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The Pro Tech Toolkit is the one thing every DIYer, fixer, hacker, hobbyist, and professional needs to tackle any job. Every tool in the Pro Tech Toolkit has been re-engineered to be better. From the 64 Bit Driver Kit to the iFixit Opening Picks, every tool is specially designed and selected to maximize your repair capabilities. At the core of this kit is the iFixit 64 Bit Driver Kit, designed with extensive research into what fastener types are currently used in the consumer electronics industry and which legacy fasteners are still in demand by consumers. From the Apple Watch with its new tiny Tri-Point screws to vintage Nintendo game consoles with gamebit fasteners, the 64 bit kit covers them all with the highest quality CNC machined bits. Even the sturdy case was carefully engineered, having no hinges or latches to break, and features a sorting tray inside the magnetically attached lid. High-Performance Toolkit for DIY Repairs The perfect toolkit for pros to average joes. Contains all the poking, prying, gripping, lifting, ESD safety, and screw driving tools needed to service consumer electronics. Completely re-engineered to provide all the tools that you need, and none that you don't. Included Anti-Static Wrist Strap – protection for circuits against static electricity Small Suction Handle – suction handle for holding onto things lacking handles 3x iFixit Opening Tool – soft plastic prying tools 6x iFixit Opening Picks – thin prying tool for opening electronic devices Nylon Tipped Reverse Tweezers – to elevate and hold your work Angled ESD Tweezers – ESD-safe, feature teeth for tougher grip Blunt ESD Tweezers – ESD-safe, feature teeth for tougher grip Standard Spudger – tough antistatic tool for a variety of purposes Halberd Spudger – features a hook for scooping, scraping, pulling, and guiding.ESD-safe. Metal Spudger – for more powerful prying, scraping, probing, and poking action Jimmy – handy tool for 'Jimmy'ing open electronics. Magnetic Pad – Holds tiny screws and parts during repairs Tool Roll – Durable and compact Mako Precision Bit Set – all the bits needed for repairs on small electronics Mako Precision Bit Set Includes 64 Bit Driver 150 mm Flex Extension 4 mm Screwdriver Bits Phillips – 000, 00, 0, 1, 2 Flathead – 1, 1.5, 2, 2.5, 3, 4 mm Torx – T2, T3, T4, T5 Torx Security – TR6, TR7, TR8, TR9, TR10, TR15, TR20, TR25 Pentalobe – P2, P5, P6 JIS – J000, J00, J0, J1 Hex – 0.7, 0.9, 1.3, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5 mm Tri-point – Y000, Y00, Y0, Y1 Nut Driver – 2.5, 3, 3.5, 4, 4.5, 5, 5.5 mm Square – 1, 2 Gamebit – 3.8, 4.5 mm Spanner – 6, 8 Triangle – 2, 3 mm Standoff Bit for iPhone Oval Bit Magnetic Pickup Bit SIM Eject Bit 1/4" to 4 mm Driver Adapter

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IMAGE PROCESSING WITH THE NVIDIA JETSON NANO (PART 2)Image Recognition Using Edge Impulse ELEKTOR JUMPSTARTER NEWSUpcoming Campaigns AN OPEN-SOURCE GPS TRACKING PLATFORMTraccar Maps Vehicle Tracking Without the Need for a Third-Party Cloud Server JOY-IT LCR-T7 MULTI-FUNCTION TESTERTesting Passives, Discrete Semiconductors and IR Remote Controls NOISE SYNTHESIZERFrom Noise to Music with the PRBSynth1 STARTING OUT IN ELECTRONICSEasier than Imagined! ... Continuing with the Coil UNDERSTANDING THE NEURONS IN NEURAL NETWORKS (PART 2)Logical Neurons ISSUES WITH SECURITY? FIGHT FIRE WITH FIRE!Flashbulb-Protected Analogue Memory Add-on For the Tamper-Evident Box LCR METER POSTER BLUETOOTH BEACONS IN PRACTICEBeacons Light the Way Ahead C PROGRAMMING ON RASPBERRY PICommunicating over Wi-Fi (Sample Chapter) EMC PRE-COMPLIANCE TEST FOR YOUR DC-POWERED PROJECT (PART 2)The Hardware and How to Use It HANDS ON THE PARALLAX PROPELLER 2 (PART 5)Inside the Smart Pin MODBUS OVER WLAN (PART 1)Hardware and Programming HOMELAB TOURSWhere the Junior Computer Is Brought to Life Again BUILD YOUR OWN HIGH-PRECISION CALIBRATOR-10 V to +10 V, 0 to 40 mA, 0.001% ARDUINO NANO RP2040 CONNECTRaspberry Pi RP2040 + Wi-Fi + Bluetooth THE PHYSICAL BODY OF ARTIFICIAL INTELLIGENCE ERR-LECTRONICSCorrections, Updates and Readers’ Letters CREATE GUIS WITH PYTHONIntroducing guizero CO2 METER KIT FOR THE CLASSROOMAn ESP8266-Based Device from the University of Applied Sciences Aachen NOSTALGIC MK484 MW/LW RADIO...Always Fun to Build! ELEKTOR @ 60Let There Be Light! HEXADOKUThe Original Elektorized Sudoku

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The Elektor Laser Head transforms the Elektor Sand Clock into a clock that writes the time on glow-in-the-dark film instead of sand. In addition to displaying the time, it can also be used to create ephemeral drawings. The 5 mW laser pointer, with a wavelength of 405 nm, produces bright green drawings on the glow-in-the-dark film. For best results, use the kit in a dimly lit room. Warning: Never look directly into the laser beam! The kit includes all the necessary components, but soldering three wires is required. Note: This kit is also compatible with the original Arduino-based Sand Clock from 2017. For more details, see Elektor Magazine 1-2/2017 and Elektor Magazine 1-2/2018.

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Siglent's SDG2000X is a series of dual-channel function/arbitrary waveform generators with specifications of up to 120 MHz maximum bandwidth, 1.2 GSa/s sampling rate and 16-bit vertical resolution. The proprietary TrueArb & EasyPulse techniques help to solve the weaknesses inherent in traditional DDS generators when generating arbitrary, square and pulse waveforms. With advantages above, SDG2000X can provide users with a variety of high fidelity and low jitter signals, which can meet the growing requirements of complex and extensive applications. Features Dual-channel, 40 MHz bandwidth, 20Vpp maximum output amplitude, high fidelity output with 80dB dynamic range. High-performance sampling system with 1.2GSa/s sampling rate and 16-bit vertical resolution. No detail in your waveforms will be lost. Innovative TrueArb technology, based on a point-by-point architecture, supports any 8pts~8Mpts Arb waveform with a sampling rate in range of 1μSa/s~75MSa/s. Innovative EasyPulse technology, capable of generating lower jitter Square or Pulse waveforms, brings a wide range and extremely high precision in pulse width and rise/fall times adjustment. Plenty of analog and digital modulation types: AM, DSB-AM, FM, PM, FSK, ASK and PWM. Sweep and Burst functions. High precision Frequency Counter. Standard interfaces: USB Host, USB DeviceUSBTMC, LAN (VXI-11) Optional interface: GPIB. 4.3” touch screen display for easier operation. Specifications Maximum output frequency 40 MHz Output channels 2 Sampling rate 1.2 GSa/s (4X Interpolation) Wave length CH1: 16 Kpts, CH2: 512 Kpts Frequency resolution 1 μHz Vertical resolution 16 bit Standard interfaces Standard interfaces: USB Host, USB Device (USBTMC), LAN (VXI-11) High-performance Sampling System Benefiting from a 1.2GSa/s and 16-bit sampling system, SDG2000X achieves extremely high accuracy performance in both time domain and amplitude, which results in more accurately reconstructed waveforms and lower distortion. Innovative EasyPulse Technology When a Square/Pulse waveform is generated by DDS, there will be a one-clock-jitter if the sampling rate is not an integer-related multiple of the output frequency. SDG2000X EasyPulse technology successfully overcomes this weakness in DDS designs and helps to produce low jitter Square/Pulse waveforms. Innovative TrueArb Technology For arbitrary waveforms, TrueArb not only has all the advantages of traditional DDS, but also eliminates the probability that DDS may cause serious jitter and distortion. Easy controll with 4.3” Touch Screen Display and Arbitrary Waveform Software EasyWave The 4.3” touch screen display, makes operation much more convenient. And EasyWave is a powerful arbitrary waveform editing software that supports several ways to generate arbitrary waveform such as manual drawing, line-drawing, equation-drawing, coordinate-drawing, etc. It is quite convenient for users to edit their own arbitrary waveforms through EasyWave. Included Siglent SDG2042X Arbitrary Function Generator User Manual Guarantee Card CD (including EasyWave 1.0 computer software system) Power Cord USB Cable Quick Start Guide

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Using the RFID Starter Kit An Arduino board has now become ‘the’ basic component in the maker community. No longer is an introduction to the world of microcontrollers the preserve of the expert. When it comes to expanding the capabilities of the basic Arduino board however, the developer is still largely on his own. If you really want to build some innovative projects it’s often necessary to get down to component level. This can present many beginners with major problems. That is exactly where this book begins. This book explains how a wide variety of practical projects can be built using items supplied in a single kit together with the Arduino board. This kit, called the 'RFID Starter Kit for Arduino' (SKU 17240) is not just limited to RFID applications but contains more than 30 components, devices and modules covering all areas of modern electronics. In addition to more simple components such as LEDs and resistors there are also complex and sophisticated modules that employ the latest technology such as: A humidity sensor A multicolor LED A large LED matrix with 64 points of light A 4-character 7-segment LED display An infra red remote-controller unit A complete LC-display module A servo A stepper motor and controller module A complete RFID reader module and security tag On top of that you will get to build precise digital thermometers, hygrometers, exposure meters and various alarm systems. There are also practical devices and applications such as a fully automatic rain sensor, a sound-controlled remote control system, a multifunctional weather station and so much more. All of the projects described can be built using the components supplied in the Elektor kit.

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Projects Using Arduino IDE and the LVGL Graphics Library The ESP32 is probably one of the most popular microcontrollers used by many people, including students, hobbyists, and professional engineers. Its low cost, coupled with rich features makes it a popular device to use in many projects. Recently, a board called the ESP32 Cheap Yellow Display (CYD for short) is available from its manufacturers. The board includes a standard ESP32 microcontroller together with a 320x240 pixel TFT display. Additionally, the board provides several connectors for interfaces such as GPIO, serial port (TX/RX), power and Ground. The inclusion of a TFT display is a real advantage as it enables users to design complex graphics-based projects without resorting to an external LCD or graphics displays. The book describes the basic hardware of the ESP32 CYD board and provides details of its on-board connectors. Many basic, simple, and intermediate-level projects are given in the book based on the ESP32 CYD, using the highly popular Arduino IDE 2.0 integrated development environment. The use of both the basic graphics functions and the use of the popular LVGL graphics library are discussed in the book and projects are given that use both types of approaches. All the projects given in the book have been tested and are working. The block diagram, circuit diagram, and the complete program listings and program descriptions of all the projects are given with explanations. Readers can use the LVGL graphics library to design highly popular eye-catching full-color graphics projects using widgets such as buttons, labels, calendars, keypads, keyboards, message boxes, spinboxes, sliders, charts, tables, menus, bars, switches, drop-down lists, animations, and many more widgets.

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The tinySA Ultra+ ZS-407 is a compact, handheld spectrum analyzer and signal generator. Covering 100 kHz to 7.3 GHz in Ultra mode, it lets you visualize and analyze RF signals from HF right through many modern wireless bands – and can even spot signals up to ~12 GHz thanks to harmonic tracking. The intuitive 4-inch resistive touchscreen and rechargeable battery make it great for fieldwork, while features like a built-in signal generator, switchable bandpass filters, step attenuator, USB-PC control and auto-calibration add serious versatility. Features Screen size: 4 inch (480 x 320) Spectrum Analyzer for 0.1-900 MHz or, with Ultra mode enabled up to 7.3 GHz, level calibrated up to 7.3 GHz. Can observe signals up to 12 GHz Signal Generator with sine wave output between 0.1-900 MHz or square wave up to 6.3 GHz or RF test signal output up to 7.3 GHz when not used as Spectrum Analyzer. Switchable resolution bandpass filters from 200 Hz to 850 kHz Built-in 20 dB optional LNA Color display showing max 450 points providing gapless covering up to the full frequency range. MicroSD card slot for storing measurements, settings and screen captures. Specifications (Spectrum Analyzer) Input frequency range from 100 kHz to 900 MHz in normal mode and up to 7.3 GHz with ULTRA mode enabled Input impedance 50 ohm when input attenuation set to 10 dB or more. Selectable manual and automatic input attenuation between 0 dB and 31 dB in 1 dB steps when LNA not active Maximum +/-5V DC input Absolute maximum input level of +6 dBm with 0 dB internal attenuation Absolute maximum short term peak input power of +20 dBm with 30 dB internal attenuation Suggested maximum input power of +0 dBm with internal attenuation in automatic mode For best measurements keep input power below -25 dBm Input Intercept Point of third order modulation products (IIP3) of +15 dBm with 0 dB internal attenuation 1 dB compression point at -1 dBm with 0 dB internal attenuation Power detector resolution of 0.5 dB and linearity versus frequency of ±2 dB below 5.3 GHz, ±5dB between 5.3 GHz and 6 GHz Minimum burst length for correct level measurement at 850 kHz RBW in zero span mode of 50 microseconds Absolute power level accuracy after power level calibration of ±2 dB Built-in optional 20 dB LNA with Noise Figure of 5 dB up to 6 GHz Lowest discernible signal without LNA at 30 MHz using a resolution bandwidth of 30 kHz of -102 dBm Lowest discernible signal with LNA at 30 MHz using a resolution bandwidth of 200 Hz of -145 dBm Frequency accuracy equal to the selected resolution bandwidth Phase noise at 30 MHz of -108 dB/Hz at 100 kHz offset and -115 dB/Hz at 1MHz offset Spur free dynamic range when using a 30 kHz resolution bandwidth of 70 dB Resolution filters with a width of 0.2, 1, 3, 10, 30, 100, 300, 600 and 850 kHz On screen resolution of 51, 101, 145, 290 or 450 measurement points. Scanning speed of over 1000 points/second using largest resolution filters. Automatic optimization of actual scanning points to ensure coverage of the whole scan range regardless of the chosen resolution bandwidth Spur suppression option for assessing if certain signals are internally generated or actually present in the input signal Headphone output for listening to the demodulated audio (AM only). Stereo connector with or without microphone, high impedance is louder, short protected Specifications (Signal Generator) Sine wave output with harmonics below -40 dB of fundamental from 100 kHz to 900 MHz Output level selectable in 1 dB steps between -115 dBm and -19 dBm Above 800 MHz choice of two output modes: Cleanest signal mode: square wave, up to 6 GHz with coarse frequency steps and less accurate output level Highest accuracy mode: reduced harmonics with possibly strong spurs up to 7.3 GHz with frequency resolution equal to below 800 MHz and fine output level steps Level accuracy ±2 dB up to 800 MHz between -72 dBm and -19 dBm, less accuracy below -72 dBm, even less accuracy below -110 dBm Output frequency resolution 57.2 Hz Optional AM or FM modulation frequencies between 50 Hz and 5 kHz (AM) or 1 kHz (FM) or sweep over selectable frequency span AM modulation depth between 10% and 100% FM deviation between 1 kHz and 300 kHz Optional output level sweep over maximum the entire output level range Included 1x tinySA Ultra+ ZS407 Spectrum Analyzer 2x SMA connection cables 1x Barrel connector 1x Antenna with SMA connector 1x USB-C cable 1x microSD card (32 GB) Downloads Wiki

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The Peak Atlas LCR45 does everything that the popular LCR40 does, but it has some significant enhancements. The LCR45 features a new high capacity micro and high resolution ADCs. LCR45 incorporates advanced maths, based on Complex Impedance analysis. This allows for enhanced component value measurement as well as a comprehensive and detailed impedance display. Features Supplied with gold plated removable hook probes Fluid measurements with hold function Automatic or manual component type Automatic or manual test frequency, DC, 1 kHz, 15 kHz or 200 kHz Enhanced measurement resolution: 0.2 µH, 0.2 pF and 0.2 Ohms Easy menu system for user settings Enhanced compensation for component parasitics and losses (such as core losses etc) Automatic or manual power-off Specifications Analyser type LCR and component impedance Component types Auto/Manual for L,C & R Measurement types Inductance, Capacitance and Resistance Other measurements Complex impedance/admittance More measurements Magnitude and Phase of impedance Inductance range 0uH to 2H Capacitance range 0 pF to 10000 uF Resistance range 0R to 2MR Test frequency Auto and manual: DC, 1 kHz, 15 kHz, 200 kHz Display type Alphanumeric LCD (not backlit) Measurement scheme Continuous (with optional hold) Battery GP23 (12 V/55 mAH type), ~700 ops Included LCR45 Passive Component Impedance Meter 2 mm plugs and sockets and removeable hook probes Comprehensive illustrated user guide 2 Batteries, one installed and one spare. GP23 Alkaline battery. (12 V/55 mAH) Downloads Datasheet (EN) User Guide (EN) User Guide (FR) User Guide (IT)

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Ce qui se passe en électronique est par définition invisible à l'oeil nu. L'instrument qui permet précisément de rendre visibles les signaux électriques, celui par le truchement duquel les effets de l'électronique se manifestent à nous, c'est l'oscilloscope. Hélas, quand on commence à faire de l'électronique, c'est souvent sans oscilloscope. Et l'on en est réduit à tâtonner, aussi bien physiquement que mentalement. Le jour où l'on goûte à la visualisation des signaux sur un écran, c'est une révélation. Plus personne ne souhaite se priver de cet enchantement. Pas de retour en arrière. En électronique, si l'on veut progresser dans le plaisir et dans la compréhension, il faut un oscillo. Commence alors une période d'interrogation : comment choisir ? Et à peine cette question-là aura-t-elle trouvé sa réponse, il en viendra une ribambelle d'autres que l'on peut résumer en une seule : comment se servir de l'oscilloscope de telle sorte que ce qu'il affiche corresponde bien à la réalité des signaux ? Dans ce livre, Rémy Mallard, répond clairement à ces questions. Il donne aussi de nombreuses informations pour aider son lecteur à élucider lui-même de nouveaux mystères qui ne manqueront pas de surgir. Ceux qui le connaissent déjà comme l'auteur d'un livre sur l'électronique dont le titre est un programme à lui tout seul : L'électronique pour les débutants qui sèchent les cours mais soudent sans se brûler les doigts, ainsi que d'un livre d'initiation à la programmation des microcontrôleurs PIC, savent qu'ils trouveront ici un ouvrage utile, qu'ils rouvriront souvent.

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Enhance your Raspberry Pi 5 with the Pironman 5, built with sturdy aluminum, superior cooling, NVMe M.2 SSD support, OLED display, RGB lighting, standard HDMI ports x2, and a secure power switch. It is perfect for NAS, Home Assistant, Media and Game Centers. The Pironman 5 is not just a case; it’s an upgrade that transforms your Raspberry Pi 5 into a powerful, efficient, and stylish device. The Pironman 5 includes the Pi 5 NVMe PIP (PCIe Peripheral Board), a PCIe adapter board specifically designed for NVMe solid-state drives. This board supports four sizes of NVMe SSDs: 2230, 2242, 2260, and 2280, all of which can be installed in an M.2 M key slot. The connection is certified for Gen 2.0 speeds (5 GT/sec), but can be forced to Gen 3.0 (10 GT/sec) for faster performance. Expandable NVMe M.2 SSD Slot Boost your Raspberry Pi 5's performance with the Pironman 5's NVMe M.2 SSD slot, supporting multiple sizes (2230, 2242, 2260, 2280) for increased storage and faster system response. Advanced Cooling System Keep your Raspberry Pi 5 cool and stylish with the Pironman 5's tower cooler and dual RGB fans, featuring dust filters for durable, low-maintenance operation. OLED Display for Instant Insights The Pironman 5 includes a 0.96" OLED display, providing immediate updates on CPU and RAM usage, temperature, IP address, and more. Enhanced Functionality and Safety The Pironman 5 secures your Raspberry Pi 5 with features like safe shutdown, customizable RGB LEDs, HDMI ports, an IR receiver, and an external GPIO extender, enhancing functionality and connectivity. Features Raspberry Pi 5 mini PC 0.96" OLED Display showing Raspberry Pi’s CPU usage, temperature, disk usage, IP address, RAM usage etc. Tower cooler can cool a 100% CPU load Pi to 39°C at 25°C room temperature 2 RGB Fans, with GPIO control 1 PWM Fan on the Tower Cooler is controlled by the Raspberry Pi system. Supports four (PCIe Gen 2.0 / PCIe Gen 3.0) NVMe M.2 SSD sizes: 2230, 2242, 2260, and 2280. 4 WS2812 Addressable RGB LED light up the whole case with cool light effect IR Receiver for multi-media center like Kodi or Volumio Retro metal power button for safe shut down External GPIO extender with pin name label, for easy access Equipped with a spring-loaded socket for easy card removal Aluminum main body with clear Acrylic side panel Features two standard HDMI ports Downloads Documentation

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This complete Raspberry Pi Pico microcontroller programming course features a textbook, a component kit, hands-on projects, and a comprehensive online course with simulations. It is ideal for step-by-step learning of embedded systems programming with Arduino using a practical, hands-on approach. A Practical Introduction to Embedded Systems with the Raspberry Pi Pico This course is designed for people who are new to embedded systems and looking for a structured, example-driven way to get started. A kit of parts comprising LEDs and resistors, switches, sensors and actuators, displays, a breadboard and wires, and more is included. These are used in the course to illustrate example applications. No prior experience with Arduino or embedded development is required. Each section features hands-on examples and mini projects designed to reinforce key concepts and inspire deeper exploration. By the end of the course, you’ll be able not only to reproduce the examples but also to build on them with your own ideas and applications. What Will You Learn? Microcontroller programming in C/C++ with the Raspberry Pi Pico using the Arduino IDE Working with Digital I/O, read buttons and encoders, control LEDs and relays Read analog inputs, voltages, and analog sensors Generating analog output signals and PWM Use serial communication like UART, I²C and SPI to control displays and read digital sensors and SD cards Managing time Working with interrupts Real-time sensor input and control via buttons, LEDs, and displays Control actuators like relays and servo motors Who Is It For? Students and self-learners exploring embedded systems Makers and IoT enthusiasts looking to improve their hardware skills Educators and trainers seeking ready-to-teach material What's Inside the Box? Access to the full course on the Elektor Academy Pro Learning Platform Raspberry Pi Pico microcontroller board + USB cable Book: Programming Microcontrollers in C/C++ Using Arduino Downloadable project files for every module Component Box: 2× LED, red, 5 mm LED, green, 5 mm 3× Resistor, 470 Ω, 0.25 W LDR Potentiometer, 10 kΩ, linear Pushbutton Rotary encoder module Relay module DHT22 Humidity & Temperature Sensor TM1637-compatible 4-digit 7-segment display MPU-6050 IMU with headers SSD1306-compatible I²C OLED display Micro SD card adapter with header Buzzer SG90 Micro Servo ILI9341-compatible SPI 240×320 TFT display 20× Jumper wires Breadboard All Programming Courses (and differences in content) Course Arduino Raspberry Pi Pico with Arduino C/C++ ESP32 with Arduino C/C++ Raspberry Pi Pico with MicroPython ESP32 with MicroPython Online Course Access to Arduino Course Access to Pico with Arduino C/C++ Course Access to ESP32 with Arduino C/C++ Course Access to Pico with MicroPython Course Access to ESP32 with MicroPython Course Board Uno R3 Raspberry Pi Pico ESP32 Raspberry Pi Pico ESP32 Book Programming Microcontrollers in C/C++ Using Arduino Programming Microcontrollers in C/C++ Using Arduino Programming Microcontrollers in C/C++ Using Arduino Programming Microcontrollers in MicroPython Programming Microcontrollers in MicroPython Kit 40-piece Component Box 40-piece Component Box 40-piece Component Box 40-piece Component Box 40-piece Component Box

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The Elektor Low-Noise Lab Power Supply is a fully analogue, adjustable, medium-power symmetrical bench supply that contains no switching or digital components. It provides an output voltage adjustable between 0 V and ±22 V, and an output current adjustable from 0 A to 1 A. Because it avoids any form of switching circuitry, the design delivers extremely low noise. To display both output voltages and currents, four miniature moving-coil panel meters are used. Most modern laboratory power supplies and AC adapters employ switch-mode techniques. Even the best examples inevitably exhibit high-frequency ripple and other switching artefacts on their output, which can interfere with the testing of sensitive analogue circuits and disturb low-level measurements. To overcome this, the concept here is a completely analogue power supply. Although less efficient than its switch-mode counterparts, the reduced efficiency is of little importance for test-bench use and ensures cleaner, more reliable measurement results. Because many analogue circuits require a symmetrical supply, this design delivers positive and negative output voltages of equal magnitude. A small amount of adjustment is available to compensate for any imbalance. Naturally, a variable current-limit function is also included. The kit includes the components required to build the power supply, except for the transformers. Specifications Output Voltage 0…+22 V, 0, −22 V Output Current 0…+1 A, 0…−1 A Noise −85 dBV, (at 0.95 A/20 V, B = 22 kHz) −84 dBV (at 0.95 A/20 V, B > 500 kHz) Ripple 50 µVRMS (at 950 mA/20 V, B = 22 kHz, mainly 100 Hz component) Included 3x PCBs: Regulator (PCB-1), Mains Filter (PCB-2) and Transformer (PCB-3) All the components except the AC transformers 4x moving-coil meters Additional parts for wiring (wires, banana sockets, IEC Power entry module, etc.) Not included The three AC transformers An enclosure Parts List For the Regulator PCB (240386-1) Resistors (250 mW, 1%) R1 = 12 Ω R2, R8, R37, R62 = 1 MΩ R3, R7, R10, R13, R17, R20, R22, R30, R35, R42, R45, R47, R55, R60 = 100 Ω, 600 mW R4, R5 = 4.7 kΩ R6 = 100 kΩ R9, R12, R14, R36, R38, R39, R61, R63, R66, R72, R78, R79 = 10.0 kΩ, 600 mW R11 = 9.76 kΩ, 600 mW R15, R40 = 44.2 kΩ, 600 mW R16, R41, R77 = 1 kΩ R18, R43 = 1.5 kΩ, 1 W, 5% R19, R44 = 470 Ω, 1 W, 5% R21, R46 = 330 Ω, 600 mW R23, R24, R48, R49 = 1.0 Ω, 1 W R25, R50 = 1 kΩ, 1 W, 5% R26, R28, R51, R53 = 1.000 kΩ 0.1%, 15 ppm/C R27, R29, R52, R54 = 10.00 kΩ 0.1%, 15 ppm/C R31, R56 = 1.2 kΩ, 1 W, 5% R32, R57 = 47 kΩ R33, R58 = 270 Ω R34, R59 = 27 kΩ R64, R69 = 12.0 kΩ R65 = 3.0 kΩ, 600 mW R67, R80 = 470 Ω, 600 mW R68, R70 = 6.8 kΩ, 600 mW R71 = 30.0 kΩ,, 600 mW R73, R74, R75, R76 = 10 MΩ P1, P2, P3 = 10 kΩ, 200 mW, 20%, potentiometer, 1 turns, single, lin., panel mount P4, P5 = 500 Ω, 500 mW, 10%, trimmer, 25 turns, 3296Y-1-501LF Bourns P6, P7 = 10 kΩ, 500 mW, 10%, trimmer, 25 turns, 3296Y-1-501LF Bourns Capacitors C1 = 100 nF, 50 V, 10%, ceramic X7R, LS 5 mm C2, C3, C6, C7, C30 = 10 µF, 63V, 20%, LS 2.5 mm, 3000hours@105°C C4, C5, C8, C9, C13, C14, C18, C19, C23, C24, C28, C29, C31, C32, C38, C39 = 100 nF, 250 V, 10%, PET, LS 7.5 mm C10, C20 = 47 nF, 100 V, 5%, PET, LS 5 mm C11, C21 = 10 nF, 100 V, 5%, PET, LS 5 mm C12, C22 = 220 µF, 35 V, 20%, 0.024 Ω, LS2.5/3.5 mm, Ir 3.4 A, 2000hours@125°C, polymer C15, C25 = 120 µF, 50 V, 20%, ESR 0.02 Ω, Diam. 10 mm max., LS 5 mm C16, C26 = 15 nF, 100 V, 5%, PET, LS 5 mm C17, C27 = 47 nF, 100 V, 5%, PET, LS 5 mm C33, C34 = 22 µF, 50 V, 20%, LS 2 mm, 10000 hours @ 105°C C35, C36, C44, C45 = 1 µF, 100 V, 10%, LS 5 mm, ceramic X7R C37 = 100 uF, 50 V, 20%. LS 3.5 mm C40, C41, C42, C43, C46, C47, C48, C49 = 1000 µF, 50 V, 20%, LS 5/7.5 mm, Ir 3.32 A, 10000hours@105°C, D 16 mm C50, C51, C52, C53 = 47 nF, 100 V, 10%, ceramic X7R, LS 5 mm Inductors L1, L2 = 4.7 µH, 3.2 A, 0.033 Ω, LS 5 mm, RLB0914-4R7ML Bourns L3 = Commom mode choke, 14.5 mH, 3 A, SSRH24NH-30145 Kemet Semiconductors D1, D2, D3, D4, D5, D9, D10, D11, D15 = BAT85, DO-34 D6, D7, D12, D13 = SR560, DO-201AD D8, D14, D16 = 1N4148, DO-35 D17 = Zenerdiode, 5.6 V, 0.5 W, DO-41 D18, D19 = 1N4004, DO-41 D20, D21 D22, D23 = V30100CI-M3/P, dual common cathode, TO-220 D24 = Zener diode, 30 V, 1 W, DO-41 LED1, LED2 = LED, red, T-1 (3 mm) LED3, LED4 = LED, green, T-1 (3 mm) TVS1, TVS2 = BZW50-33B, R6 T1, T2, T4 = BC337.25, TO-92 T3 = NJW0302G, TO-3P T5, T6, T8 = BC327.25, TO-92 T7 = NJW0281G, TO-3P T9 = BD139, TO-126 (SOT-32) IC1 = LM334Z, TO-92 IC2 = LM4040AIZ-5.0/NOPB, TO-92 (TO-226AA-3) IC3, IC4 = OPA2992IDR, SOIC-8 IC5, IC6 = OPA4992IDR, SOIC-14 IC7 = OPA992IDBVR, SOT-23-5 IC8 = LM339N, DIP-14 IC9 = LM317, TO-220 IC10 = LM337, TO-220 Others F1, F2 = 5×20 mm fuse, 1.6 A, fast acting HS1, HS2 = Heatsink MC33271 (for T3/T7), 2.7°C/W, PCB mount, height 63.5 mm K1, K4 = 3-way screw terminal block, LS 3.5 mm, max. 1.5 mm² K2, K3 = 3-way screw terminal block, LS 3.5 mm, max. 1 mm² M1, M3 = Moving coil meter, Range 30 V, type 91C4, 45×45 mm M2, M4 = Moving coil meter, Range 1 A, type 91C4, 45×45 mm² RE1 = Relay DPDT,5V, UA2-5NU Miscellaneous 3× 3-way screw terminal block, LS 3.5 mm, max. 1 mm² (for P1, P2, P3) 4× Pin header, 1×2, vertical, pitch 2.54 mm (for LED1, LED2, LED3, LED4) 4× Pin socket, 1×2, vertical. pitch 2.54 mm (for LED1, LED2, LED3, LED4) 2× Heatsink FK222SA220, 20°C/W, PCB mount (for IC9 & IC10) 2× Mica thermal pad for TO-220, 12×18×0.05 mm (for IC9 & IC10) 2× Insulating bushing IB 6, TO-220 (for IC9 & IC10) 2× Ceramic thermal pad, 23×20×2 mm (for T3 & T7) 2× PCB Fuse Holder, for 5×20 mm fuse, 10 A (for F1, F2) 2× Cover for PCB Fuse Holder, transparent (for F1, F2) 2× 2-way screw terminal block, LS 3.5 mm, max. 1 mm² (for M1 & M3) 2× 2-way screw terminal block, LS 3.5 mm, max. 1.5 mm² (for M2 & M4) 8× M3 solder lug, thickness 0.35 mm (for M1…M4) M4 solder lug, thickness 0.35 mm (to connect 4 mm banana connectors) Screened cable, 1 pair, 2×24 AWG/0.22 mm², 1 m (for P1, P2 & P3) IC socket, DIP, 14 contacts (for IC8) M3 washer, plain, steel M3 screw, 16 mm, steel, pan head M3 nut M3 spring washer 50 mm M3 standoff, steel, male-female 12 mm M3 standoff, steel, male-female 10 mm M3 standoff, steel, male-female M3 screw, 8 mm, steel, pan head For the Mains Fiter PCB (240386-2) Resistor R1 = 220 kΩ, 1 W, 500 V, 5% Capacitors C1, C2 = 470 nF, 305 VAC, Class X2, 11 × 27 mm max., LS 15/22.5 mm C3, C4, C5, C6 = 2.2 nF, 300 VAC, Class Y2, 13 × 4 mm, LS 10 mm, PP Inductors L1, L2 = Common-mode choke, 6.8 mH, 1.7 A, TDK B82732R2172B030 Semiconductor MOV1 = TVS varistor, 300 VAC, S14K300 (230 VAC, B72214S0301K101) and SK14K150 (150 VAC, B72214S0151K101) Others K1, K2 = 3-way screw terminal block, LS 7.62 mm F1 = Time-delay fuse, 0.5 A (230 VAC) or 1 A (115 VAC) Miscellaneous 1× Fuse holder, 5×20 mm, 10 A, 500 VAC 1× Transparent fuse cover 4× 10 mm M3 standoff, steel, male–female 4× M3 screw, 8 mm, steel, pan head 4× M3 nut For the Transformer PCB (240386-3) Resistors R1, R2 = 2.7 kΩ, 600 mW, 1% R3 = 10.0 kΩ, 600 mW, 1% Capacitor C1 = 220 µF, 50 V, 20%, Ø10 mm, LS 5 mm, 4000 h @ 105°C Transformers (not included in this kit!) TR1, TR2, TR3 = 2×7 V, 25 VA, PCB-mounted toroid, 70060K Talema Semiconductors D1–D4 = 1N4148, DO-35 D5, D6 = 1N4004, DO-41 D7 = Zener 5.6 V, 1.3 W, DO-41 LED1 = LED, red, T-1 (3 mm) IC1, IC2 = MOC8021M, CTR ≥ 1000%, DIP-6 Others F1, F2, F3 = 160 mA time-delay fuse (230 VAC) or 315 mA time-delay fuse (115 VAC) K1 = 2-way screw terminal block, LS 7.62 mm K2 = 3-way screw terminal block, LS 3.5 mm, max 1.5 mm² K3, K4 = 3-way screw terminal block, LS 3.5 mm, max 1 mm² RE1, RE2 = Relay DPDT, 5 A/250 VAC / 24 VDC Miscellaneaous 1× Pin header 1×2, pitch 2.54 mm + matching socket for LED1 3× Fuse holder 5 × 20 mm, 10 A, 500 VAC + transparent cover 3× M4 screw, 8 mm, pan head + washer for TR1-TR3 8× M3 screw, 8 mm, pan head + nut + washer 8× 10 mm M3 standoff, steel, male–female 2× IC socket, DIP-6 for IC1 & IC2 Additional Parts 1 m red insulated wire, stranded, 1.5 mm² 0.5 m blue insulated wire, stranded, 1.5 mm² 0.5 m black insulated wire, stranded, 1.5 mm², 0.5 m 2 m red insulated wire, stranded, D 0.56 mm (0.25 mm²) 2 m black insulated wire, stranded, D 0.56 mm (0.25 mm²) 0.5 m Multicore Cable, Flexible, 3 Core, 0.75 mm² (24 x 0.2 mm) Red banana socket Black banana socket Blue banana socket Green banana socket IEC Power Entry Module with switch, IEC C14 3 crimp terminals, FASTON, 4.75 x 0.81 mm 3 knobs Links Elektor Labs JumpStarter Page Article (Part 1) Article (Part 2)

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