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The Elektor Zener Diode Tester is essentially a constant-current source that can be switched in steps from 1 to 50 mA. It can be used to test Z-diodes up to a maximum of 54 V. Thanks to a 60-V step-up converter, the device can be powered by the usual 5 to 12 V. The principle of this tester is straightforward. A Z-diode or other DUT (device under test, such as an LED) is biased by an adjustable current source. The voltage across the DUT can be measured with a multimeter. The voltage of most (small) Z-diodes is specified at a current of 5 mA. Depending on the application, the voltage at other currents can also be of interest. That is why six current settings are available: 1, 2, 5, 10, 20, and 50 mA. LEDs are often specified at a current of 20 mA. What can be tested is: Whether a Z-diode is defective (short circuit or high impedance). Whether a Z-diode exhibits the correct Z-voltage. How a Z-voltage changes with different currents. What exact voltage is present at an integrated voltage reference. Whether LEDs in a series chain differ in brightness (hence the 20 mA current). What the current gain is for different base currents in (power) transistors. The kit contains all parts listed in the bill of materials including PCB and enclosure. Specifications Supply voltage 5…12 V/2 A (USB-C) Supply current (Itest = 50 mA) 1.1 A @ 5 V / 412 mA @ 12 V Selectable currents 1, 2, 5, 10, 20, and 50 mA Max. test voltage >54 V @ Itest ≥1 mA Max. output voltage 60 V @ Itest = 0 mA Voltage limit at 5 V 4.5 V @ Itest = 1 mA / 5.18 V @ Itest = 50 mA Enclosure dimensions 110 x 82 x 44 mm PCB size 105.4 x 67.3 mm Connections 4 mm banana sockets for multimeter 2 mm banana sockets for test clips USB-C socket for power supply Included Resistors R1 = 3.3 kΩ, 600 mW, 1% R2 = 0.15 Ω, 1 W, 5%, LS 12.7 mm, ø 3.5 mm R3, R8 = 180 Ω, 600 mW, 1% R4, R6, R16 = 1 kΩ, 600 mW, 1% R5, R19 = 47 kΩ, 600 mW, 1% R7 = 3.9 kΩ, 1 W, 5%, LS 12.7 mm, ø 3.5 mm R9, R10, R12 = 10 kΩ, 600 mW, 1% R11, R13 = 100 Ω, 600 mW 1% R14 = 249 Ω, 600 mW, 1% R15 = 499 Ω, 600 mW, 1% R17 = 2.49 kΩ, 250 mW, 1% R18 = 4.99 kΩ, 250 mW, 1% Capacitors C1 = 470 uF / 35 V, 20%, Ir = 1.86 A, ø 12.5 mm, LS 5 mm, ESR = 0.038 Ω (Panasonic EEUTP1V471) C2 = 1 uF / 100 V, 10%, X7R, LS 5 mm C3 = 2.2 nF / 50 V, 10%, X7R, LS 5 mm C4, C7 = 100 nF / 100 V, 10%, X7R, LS 5 mm C5 = 100 uF / 100 V, 20%, ø 14 mm max., LS 5 mm C6 = 1 nF / 100 V, 10%, X7R, LS 5 mm Inductor L1 = 100 uH, Irms = 2.4 A, Isat = 3.5 A, 0.09 Ω, radial, pitch 2.5/5/10 mm, ø 14 mm max. (Kemet SBC8-101-242) Semiconductors D1 = MUR120G, DO-41 D2, D4 = STPS3150RL, DO-201AD D3 = Z-diode, 18 V, 1.3 W (BZX85C18) D5 = Z-diode, 5.1 V, 0.5 W (1N5231B) LED1 = LED in pushbutton S1 LED2 = LED, green, 3 mm IC1 = MC34063, DIP-8 IC2 = LM4040BIZ-5.0/NOPB, TO-92 (TO-226AA-3) IC3 = TL051CP, DIP-8 T1 = BC327.25, TO-92 T2 = STP40NF10L, TO-220 T3 = IRF9510PBF, TO-220 T4 = 2N7000, TO-92 Others K1, K2, S1, S3 = 2-way screw terminal block, LS 3.5 mm, max. 1.5 mm² connected to K1 = USB-C socket, 30 V/3 A, chassis mounted, wired, 9 x 16 mm connected to K2 = Banana Connector, 2 mm, Socket, 60 VDC, Panel Mount, red (Multicomp 24.102.1) connected to K2 = Banana Connector, 2 mm, Socket, 60 VDC, Panel Mount, black (Multicomp 24.102.2) Test clip, red, 30 VAC/60 VDC (Hirschmann 931467101) Test clip, black, 30 VAC/60 VDC (Hirschmann 931467100) S1 = Pushbutton, panel mount, SPST-NO, 30 DC/100 mA, with red LED S2 = Rotary Switch, 6 position, 2 pole, 30°, 250 V/150 mA S3 = Toggle switch, panel mount, SPDT, solder lugs, 28 VDC T2, T3 = Heat sink, 15°C/W, FK 214 SA-CB Enclosure Hammond 1591XXSSBK, ABS, 110 x 82 x 44 mm Knob for S2, round shaft 6 mm, ø 21 mm, with indicator line (Multicomp CP-LB21-6-6D) 4 x Self-tapping screw #4-1/4", carbon steel, pan head Banana plug, red, 2 mm, 60 VDC (Multicomp 25.205.1) Banana plug, black, 2 mm, 60 VDC (Multicomp 25.205.2) Banana socket, black 4 mm, panel mount Banana socket, red 4 mm, panel mount for LED1, LED2 = Pin header, 1 x 2, vertical, pitch 2.54 mm for LED1, LED2 = Pin socket, 1 x 2, vertical, pitch 2.54 mm for T2, T3 = M3 screw, 10 mm, steel, pan head 2 x M3 washer, plain, steel 4 x M3 nut for IC1, IC3 = DIP-8 socket Wire, black, 0.25 mm² (24 AWG), stranded 14 x 0.15 mm, 1 m Wire, red, 0.25 mm² (24 AWG), stranded 14 x 0.15 mm, 1 m PCB 250772-1 v1.1 Links Article Elektor Labs

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When you experiment with the Raspberry Pi on a regular basis and you connect a variety of external hardware to the GPIO port via the header you may well have caused some damage in the past. The Elektor Raspberry Pi Buffer Board is there to prevent this! The board is compatible with Raspberry Pi Zero, Zero 2 (W), 3, 4, 5, 400 and 500. All 26 GPIOs are buffered with bi-directional voltage translators to protect the Raspberry Pi when experimenting with new circuits. The PCB is intended to be inserted in the back of Raspberry Pi 400/500. The connector to connect to the Raspberry Pi is a right angled 40-way receptacle (2x20). The PCB is only a fraction wider. A 40-way flat cable with appropriate 2x20 headers can be connected to the buffer output header to experiment for instance with a circuit on a breadboard or PCB. The circuit uses 4x TXS0108E ICs by Texas Instruments. The PCB can also be put upright on a Raspberry Pi. Downloads Schematics Layout

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The Elektor Super Servo Tester can control servos and measure servo signals. It can test up to four servo channels at the same time. The Super Servo Tester comes as a kit. All the parts required to assemble the Super Servo Tester are included in the kit. Assembling the kit requires basic soldering skills. The microcontroller is already programmed. The Super Servo Tester features two operating modes: Control/Manual and Measure/Inputs. In Control/Manual mode the Super Servo Tester generates control signals on its outputs for up to four servos or for the flight controller or ESC. The signals are controlled by the four potentiometers. In Measure/Inputs the Super Servo Tester measures the servo signals connected to its inputs. These signals may come from for instance an ESC, a flight controller, or the receiver or another device. The signals are also routed to the outputs to control the servos or the flight controller or ESC. The results are shown on the display. Specifications Operating modes Control/Manual & Measure/Inputs Channels 3 Servo signal inputs 4 Servo signal outputs 4 Alarm Buzzer & LED Display 0.96' OLED (128 x 32 pixels) Input voltage on K5 7-12 VDC Input voltage on K1 5-7.5 VDC Input current 30 mA (9 VDC on K5, nothing connected to K1 and K2) Dimensions 113 x 66 x 25 mm Weight 60 g Included Resistors (0.25 W) R1, R3 1 kΩ, 5% R2, R4, R5, R6, R7, R9, R10 10 kΩ, 5% R8 22 Ω, 5% P1, P2, P3, P4 10 kΩ, lin/B, vertical potentiometer Capacitors C1 100 µF 16 V C2 10 µF 25 V C3, C4, C7 100 nF C5, C6 22 pF Semiconductors D1 1N5817 D2 LM385Z-2.5 D3 BZX79-C5V1 IC1 7805 IC2 ATmega328P-PU, programmed LED1 LED, 3 mm, red T1 2N7000 Miscellaneous BUZ1 Piezo buzzer with oscillator K1, K2 2-row, 12-way pinheader, 90° K5 Barrel jack K4 1-row, 4-way pin socket K3 2-row, 6-way boxed pinheader S1 Slide switch DPDT S2 Slide switch SPDT X1 Crystal, 16 MHz 28-way DIP socket for IC2 Elektor PCB OLED display, 0.96', 128 x 32 pixels, 4-pin I²C interface Links Elektor Magazine Elektor Labs

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The Elektor Milliohmmeter Adapter uses the precision of a multimeter to measure very low resistance values. It is an adapter that converts a resistance into a voltage that can be measured with a standard multimeter. The Elektor Milliohmmeter Adapter can measure resistances below 1 mΩ using a 4-wire (Kelvin) method. It is useful for locating short circuits on printed circuit boards (PCB). The adapter features three measurement ranges – 1 mΩ, 10 mΩ, and 100 mΩ – selectable via a slide switch. It also includes onboard calibration resistors. The Elektor Milliohmmeter Adapter is powered by three 1.5 V AA batteries (not included). Specifications Measurement ranges 1 mΩ, 10 mΩ, 100 mΩ, 0.1% Power supply 3x 1.5 V AA batteries (not included) Dimensions 103 x 66 x 18 mm (compatible with Hammond 1593N-type enclosure, not included) Special feature On-board calibration resistors Downloads Documentation

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Components are both shrinking and getting increasingly finer pitch year after year but your PCBs might have grown in size or the number of interconnected PCBs or the number of handsfree PCBite probes needed to test your design may have increased making it crowded on our other smaller base plates. Features With a size of 297 x 420 mm (DIN A3) the extra large baseplate has room for most PCBs and many handsfree PCBite probes for those measurements sessions where more channels than available is needed. So if you are looking for more space, extra protection or just want to clean up your work surface then this accessory is a perfect match. Designed to be used with Sensepeeks magnetic PCBite line of products including PCB holders, hands free probes and magnifier. Included 1x XL base plate (DIN A3) with pre-fitted insulation cover

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The Elektor MultiCalculator Kit is an Arduino-based multifunction calculator that goes beyond basic calculations. It offers 22 functions including light and temperature measurement, differential temperature analysis, and NEC IR remote control decoding. The Elektor MultiCalculator is a handy tool for use in your projects or for educational purposes. The kit features a Pro Mini module as the computing unit. The PCB is easy to assemble using through-hole components. The enclosure consists of 11 acrylic panels and mounting materials for easy assembly. Additionally, the device is equipped with a 16x2 alphanumeric LCD, 20 buttons, and temperature sensors. The Elektor MultiCalculator is programmable with the Arduino IDE through a 6-way PCB header. The available software is bilingual (English and Dutch). The calculator can be programmed with a programming adapter, and it is powered through USB-C. Modes of Operation Calculator 4-Ring Resistor Code 5-Ring Resistor Code Decimal to Hexadecimal and Character (ASCII) conversion Hexadecimal to Decimal and Character (ASCII) conversion Decimal to Binary and Character (ASCII) conversion Binary to Decimal and Hexadecimal conversion Hz, nF, capacitive reactance (XC) calculation Hz, µH, inductive reactance (XL) calculation Resistance calculation of two resistors connected in parallel Resistance calculation of two resistors connected in series Calculation of unknown parallel resistor Temperature measurement Differential temperature measurement T1&T2 and Delta (δ) Light measurement Stopwatch with lap time function Item counter NEC IR remote control decoding AWG conversion (American Wire Gauge) Rolling Dice Personalize startup message Temperature calibration Specifications Menu languages: English, Dutch Dimensions: 92 x 138 x 40 mm Build time: approx. 5 hours Included PCB and though-hole components Precut acrylic sheets with all mechanical parts Pro Mini microcontroller module (ATmega328/5 V/16 MHz) Programming adapter Waterproof temperature sensors USB-C cable Downloads Software

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The SQ series of handsfree PCBite probes from Sensepeek are insulated, come with included color-coded cable holders and have a lower point of gravity making them even more stable compared with the original SP series of probes. All the loved features of handsfree measurement, exchangeable fine pitch spring tipped test needle and the minimalistic design is maintained to make traditional sized and handheld probes obsolete. Features All handsfree probes from Sensepeek makes instant measurements or long triggering sessions a breeze. No more soldering wires to connect your probe or complicated tools to setup, just positioning the probe needle on any test point or component in the signal path and release. Saves time and frustration during development, verification and repairs. The minimalist design and the spring-loaded test needle makes it possible to simultaneously measure on fine pitch components and nearby signals. Both length and weight of the SQ probes are perfectly balanced to be used with the included PCB holders and base plate which is a must for handsfree function. The probe holder comes with a powerful magnet in the base, as for all PCBite probes and holders which makes the probe easy to place and reposition. The SQ series of probes can be used handheld without the probe holder as they have an insulated grip but their full potential is used when measuring handsfree. One side of the included baseplate is matte and the other is mirror polished. The mirror polished surface makes it easy to see components on the circuit board underside. For added protection during measurement the included insulation cover can be mounted on one of the surfaces. Included 4x PCBite PCB holders 1x Set of yellow insulation washers for the PCB holders 1x Large Base plate (A4) 1x Insulation cover for the base plate (A4) 1x Micro fiber cloth 4x SQ10 probes and pin tipped test needles (black) 2x Banana to dupont test wires (red/black) 5x Dupont to dupont test wires 1x Set of cable holders (4 colors) 4x Extra test needles Downloads User guide (PCBite kit) User guide (SQ10 probes)

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The SQ series of handsfree probes from Sensepeek have a lower point of gravity making them even more stable compared with the original SP series of handsfree probes. All probes in the SQ series are also insulated and can be used handheld as any traditional probe but their full potential is used when measuring handsfree. The SQ series of oscilloscope probes also includes more ground options, have probe tip protection, longer cable and support for oscilloscopes with automatic scaling (10:1). All the loved features of handsfree measurement, exchangeable fine pitch spring tipped test needle, color-coded cable holders and the minimalistic design is maintained to make traditional sized and handheld probes obsolete. Both length and weight of the SQ probes are perfectly balanced to be used with PCBite PCB holders and base plate which is a must for handsfree function. Features Passive 10:1 probe with support for oscilloscopes with automatic scaling Spring-loaded test needle for fine pitch measurements Multiple ground options Color coded cable holders Probe tip protection Insulated, can be used handheld Improved probe holder for handsfree measurement when used with PCBite PCB holders Included 1x SQ350 350 MHz probe with spring tipped test needle 1x SQ probe holder for handsfree measurement 1x Testhook with detachable cables (5 cm & 10 cm) for convenient ground connection 1x Alligator cable for convenient ground connection 1x Standard ground spring, for handheld measurements at rated bandwidth 1x Unique ground spring, for total handsfree measurements at rated bandwidth 1x Set of color coded cable holders (4 colors) 1x Probe tip protection 1x Extra test needle Downloads User Guide SQXX0 Rev1.1

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This bundle includes both volumes of "KiCad Like a Pro" (4th edition 2024). In Fundamentals and Projects (normal price: €39.95), you'll learn how to use KiCad through a practical approach, helping you quickly become productive and start designing your own boards. Advanced Projects and Recipes (normal price: €34.95) allows you to practice your new KiCad skills by challenging yourself with a series of real-world projects. The latest iteration of KiCad, the world’s best free-to-use Printed Circuit Board tool, is packed with features usually found only in expensive commercial CAD tools. This modern, cross-platform application suite built around schematic and design editors, with auxiliary applications is a stable and mature PCB tool. KiCad 8 is a perfect fit for electronic engineers and makers. Here are the most significant improvements and features in KiCad 8, both over and under the hood: Modern user interface, completely redesigned from earlier versions Improved and customizable electrical and design rule checkers Theme editor allowing you to customize KiCad on your screen Ability to import projects from Eagle, CADSTART, and more Python scripting API Improved integrated SPICE circuit simulator Multi-sheet schematics Filters define selectable elements Enhanced interactive router helps you draw single tracks and differential pairs with precision New or enhanced tools to draw tracks, measure distances, tune track lengths, etc. Advanced interactive router Built-in bill of materials generator Realistic ray-tracing capable 3D viewer Customizable teardrops Plug-in manager for quick installation of themes, libraries and functionalities such as autorouters and BOM generators The first book KiCad Like A Pro – Fundamentals and Projects will teach you to use KiCad through a practical approach. It will help you become productive quickly and start designing your own boards. Example projects illustrate the basic features of KiCad, even if you have no prior knowledge of PCB design. The author describes the entire workflow from schematic entry to the intricacies of finalizing the files for PCB production and offers sound guidance on the process. The second book KiCad Like A Pro – Advanced Projects and Recipes will help you to practice your new KiCad skills by challenging you in a series of real-world projects. The projects are supported by a comprehensive set of recipes with detailed instructions on how to achieve a variety of simple and complex tasks. Design the PCBs for a solar power supply, an LED matrix array, an Arduino-powered datalogger, and a custom ESP32 board. Understand the finer details of the interactive router, how to manage KiCad project teams with Git, how to use an autorouter on 2 and 4-layer PCBs, and much more.

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The SQ series of handsfree PCBite probes from Sensepeek are insulated, come with included color-coded cable holders and have a lower point of gravity making them even more stable compared with the original SP series of probes. All the loved features of handsfree measurement, exchangeable fine pitch spring tipped test needle and the minimalistic design is maintained to make traditional sized and handheld probes obsolete. Features All handsfree probes from Sensepeek makes instant measurements or long triggering sessions a breeze. No more soldering wires to connect your probe or complicated tools to setup, just positioning the probe needle on any test point or component in the signal path and release. Saves time and frustration during development, verification and repairs. The minimalist design and the spring-loaded test needle makes it possible to simultaneously measure on fine pitch components and nearby signals. Both length and weight of the SQ probes are perfectly balanced to be used with PCBite PCB holders and base plate which is a must for handsfree function. The probe holder comes with a powerful magnet in the base, as for all PCBite probes and holders which makes the probe easy to place and reposition. The SQ series of probes can be used handheld without the probe holder as they have an insulated grip but their full potential is used when measuring handsfree. Included 2x SQ10 probes and pin tipped test needles (red/black) 2x Banana to dupont test wires (red/black) 1x Set of cable holders (red/black) 2x Extra test needles Downloads User guide

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