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Secure, Modular, Open-Source and Self-Sufficient Ever since the Raspberry Pi was introduced, it has been used by enthusiasts to automate their homes. The Raspberry Pi is a powerful computer in a small package, with lots of interfacing options to control various devices. This book shows you how you can automate your home with a Raspberry Pi. You’ll learn how to use various wireless protocols for home automation, such as Bluetooth, 433.92 MHz radio waves, Z-Wave, and Zigbee. Soon you’ll automate your home with Python, Node-RED, and Home Assistant, and you’ll even be able to speak to your home automation system. All this is done securely, with a modular system, completely open-source, without relying on third-party services. You’re in control of your home, and no one else. At the end of this book, you can install and configure your Raspberry Pi as a highly flexible home automation gateway for protocols of your choice, and link various services with MQTT to make it your own system. This DIY (do it yourself) approach is a bit more laborious than just installing an off-the-shelf home automation system, but in the process, you can learn a lot, and in the end, you know exactly what’s running your house and how to tweak it. This is why you were interested in the Raspberry Pi in the first place, right? Turn your Raspberry Pi into a reliable gateway for various home automation protocols. Make your home automation setup reproducible with Docker Compose. Secure all your network communication with TLS. Create a video surveillance system for your home. Automate your home with Python, Node-RED, Home Assistant and AppDaemon. Securely access your home automation dashboard from remote locations. Use fully offline voice commands in your own language. Download the software and view the errata for the book on GitHub.

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The FNIRSI DPS150 is a high-performance adjustable DC power supply that features a USB-C input interface and multiple power supply modes, allowing precise adjustment of output voltage (0-30 V) and current (0-5 A). It provides efficient, low-consumption, and stable output, equipped with multiple safety protection functions including overvoltage, overcurrent, overload, overheating, and reverse connection. It can be flexibly applied to serial connection of multiple devices, with rich and user-friendly display and operation, compact and portable design, meeting various application needs. Features 30 V, 5 A, 150 W variable DC power with 0.01 V, 0.001 A precision, CC/CV modes, and <20 mV ripple to protect sensitive electronics. Supports PC, QC, and DC inputs with programmable outputs and 6 preset voltage/current settings. Compatible with 4 mm banana plugs, U-shaped terminals, and copper wires for various equipment. 8 safety mechanisms including overvoltage, current, short circuit, and overheating protection. 2.8-inch HD IPS screen with 90° flip, numerical and curve displays for easy monitoring. Small, space-saving design for use in labs, repairs, and DIY projects. Specifications Input Voltage 5~32 V DC Input Current 100 mA-5 A Output Voltage 0-30 V Output Current 0~5 A Output Power 0-150 W Input Way PD fast charger QC fast charger Power bank DC power adapters Operating Environment 0-40°C Load Regulation 0.49% Full Load Efficiency 96.30% Display 2.8 inch (320 x 240) Dimensions 106 x 76 x 28 mm Weight 178 g Included 1x DPS150 Power Supply 2x Alligator clip wires (black & red) 1x C2C PD charging cable 1x 100 W PD GaN Adapter (EU) 1x Micro USB cable 1x Manual Downloads Manual Firmware V0.0.1

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The OWON XSA815-TG (9 kHz-1.5 GHz) is a cost effective spectrum analyzer with tracking generator included and a frequency resolutions of 1 Hz. Features Frequency Range from 9 kHz to 1.500009 GHz 9-inch display 9 kHz to 1 MHz -95 dBm Displayed Average Noise Level, 1 MHz to 500 MHz 140 dBm (Typical), <-130 dBm Phase Noise -10 kHz <-80 dBc/Hz 100 kHz <-100 dBc/Hz 1 MHz <-115 dBc/Hz Resolution Bandwidth (-3 dB): 1 Hz to 1 MHz, in 1-3-5-10 sequence Tracking Generator Kit: 100 kHz to 1.500009 GHz Specifications Frequency Range 9 kHz to 500.009 MHz Frequency Resolution 1 Hz Frequency Span 9 kHz to 1.500009 GHz Span Range 0 Hz, 100 Hz to max frequency of instrument Span Uncertainty ±span / (sweep points-1) SSB Phase Noise (20°C to 30°C, fc=1 GHz) Carrier Offset 10 kHz <-80 dBc/Hz | 100 kHz <-100 dBc/Hz | 1 MHz <-115 dBc/Hz Resolution Bandwidth (-3 dB) 1 Hz to 1 MHz, in 1-3-5-10 sequence RBW Accuracy <5% typical Resolution Filter Shape Factor (60 dB: 3 dB) <5 typical Video Bandwidth (-3 dB) 10 Hz to 1 MHz, in 1-3-5-10 sequence Amplitude measurement range DANL to +10 dBm, 100 kHz to 10 MHz, Preamp Off DANL to +20 dBm, 10 MHz to 1.5 GHz, Preamp Off Reference Level -80 dBm to +30 dBm, 0.01dB by step Preamp 20 dB, nominal, 100 kHz to 1.5 GHz Input Attenuator 0 to 40 dB, 1 dB by step Display Average Noise Level Input attenuation = 0 dB, RBW = VBW = 100 Hz, sample detector, trace average ≥ 50, 20°C to 30°C, input impedance = 50 Ω) Preamp Off 9 kHz to 1 MHz -95 dBm (Typical), <-88 dBm Preamp Off 1 MHz to 500 MHz -140 dBm (Typical), <-130 dBm Preamp On 100 kHz to 1 MHz -135 dBm (Typical), <-128 dBm Preamp On 1 MHz to 500 MHz -160 dBm (Typical),<-150 dBm Tracking Generator (optional) Frequency Range 100 kHz to 1.500009 GHz Output power level range -40 dBm to 0 dBm Output level resolution 1 dB Output flatness Relative to 50 MHz | ±3 dB Tracking generator spurious Harmonic spurious -30 dBc (Tracking generator output power -10 dBm) Non-harmonic spurious -40 dBc (Tracking generator output power -10 dBm) Tracking generator to input terminal isolation -60 dB (Tracking generator output power 0 dBm) Tracking generator to input terminal isolation -60 dB (Tracking generator output power 0 dBm) Tracking generator to input terminal isolation -60 dB (Tracking generator output power 0 dBm) Dimensions 375 x 185 x 120 mm Weight 3.7 kg Included 1x XSA815-TG 1x 220 V AC power cord 1x USB Cable 1x Quickstart guide Downloads Quick Guide Specifications

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OWON VDS1022I 2-channel USB oscilloscope (25 MHz) is a oscilloscope for use with a computer. It is powered by USB and has a small size, making it easy to take it with you. The oscilloscope is very economical. It has a shielded USB connection, reducing interference and protecting the computer against over-voltage. The multi port on the scope can be used for external triggering, trigger out or Pass / Fail output. Features 25 MHz bandwidth, and max 1 GS/s real-time sample rate 10M record length Friendly UI: FFT, or X-Y, and waveform 2 views displayed on the same screen Multi-trigger option: edge, video, slope, pulse, and alternate USB isolation – less signal inference, more PC protection USB bus powering, and LAN remote control (optional) Ultra-thin body design, easy portability Specifications Bandwidth 25 MHz Channel 2+1 (multi) Sample Rate 100 MSa/s Horizontal Scale (s/div) 5 ns/div～100s/div, step by 1～2～5 Record Length 5K Max Input Voltage 400 V (PK - PK) (DC+AC, PK - PK) 40 V (PK - PK) (DC+AC, PK - PK) Vertical Resolution (A/D) 8 bits (2 channels simultaneously) Model VDS1022I Vertical Sensitivity 5 mV/div～5 V/div Trigger Type Edge, Pulse, Video, Slope, and Alternate Trigger Mode Auto, Normal, and Single Acquisition Mode Sample, Peak Detect, and Average Waveform Math ＋, －, ×, ÷, invert, FFT Communication Interface USB 2.0 (isolation) Multi-function Interface Signal Type Level Standard TTL Power Supply 5.0 V/1 A Power Consumption ≤2.5 W Dimensions (W × H × D) 170 x 120 x 18 mm Weight 0.26 kg Included 1x OWON VDS1022I oscilloscope 1x CD-ROM 1x Quick start guide 2x Oscilloscope probe 1x Probe tool 1x Power adapter 1x USB cable 1x Silicone case protectors 1x Power cable Downloads Datasheet User manual SCPI protocol USB driver

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The Unitree Go2 Controller is a dedicated remote control device designed for seamless and precise operation of the Unitree Go2 Quadruped Robot. This bimanual remote features built-in data transmission and Bluetooth modules, facilitating reliable wireless communication with the robot. It offers an ultra-long control distance of over 100 meters in open environments, ensuring flexibility in various operational scenarios. Specifications Charging Voltage 5 V Charging Current 2 A Frequency 2.4 GHz Communication Modes Data transmission module and Bluetooth Battery Capacity 2500 mAh Operating Time approx. 4.5 hours Control Distance Over 100 meters in open environments

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UNI-T UPO1202CS is a multifunctional, low-cost 2-channel digital phosphor oscilloscope with 200 MHz bandwidth and 1 GSa/s sampling rate. It can be widely used in the fields of electronic and electrical design, debugging, education and industrial design. UPO1000CS series adopts parallel digital signal processing technology, which greatly improves the data processing speed and waveform capture rate. The original Ultra Phosphor technology can present the cumulative effect of the tested signal as a multi-layered afterglow. Compared with traditional digital storage oscilloscopes, the persistence of digital phosphor oscilloscopes can present three-dimensional waveform data of amplitude, time and signal intensity. Fast Acquire technology can accurately capture abnormal events such as video, jitter, noise and runt signals. Specifications UPO1102CS UPO1202CS Bandwidth 100 MHz 200 MHz Analog channels 2 2 Sampling rate 1 GSa/s 1 GSa/s Storage depth 56 Mpts per channel 56 Mpts per channel Rise time ≤3.5ns ≤1.8ns Capture rate 500,000 wfms/s 500,000 wfms/s Waveform record 100,000 frames 100,000 frames Features 7' WVGA (800 x 480) TFT LCD Ultra Phosphor super fluorescent display effect, up to 256 levels of gray display Support RS232, I²C, SPI, CAN and LIN trigger Innovative RS232, I²C, SPI, CAN and LIN hardware decoding Vertical scale: 1 mV/div-20 V/div Low background noise: <100 μVrms 1M points enhanced FFT function. Support frequency setting, waterfall diagram, detection setting and marker measurement etc 36 kinds of waveform parameters can be automatically measured Rich trigger functions (edge, pulse width, video, slope, runt, overshoot, delay, timeout, duration, setup and hold, Nth edge and pattern trigger) Multi-Scopes support dual-channel independent trigger fluorescence display Multi-channel independent 7-bit hardware frequency counter DVM supports dual-channel independent AC and DC true RMS measurement Waveform arithmetic functions (FFT, +, -, ×, ÷, digital filtering, logic operations, and advanced operations) Rich interfaces: USB Host, USB Device, LAN, EXT Trig, AUX Out (Trig Out, Pass/Fail) Support SCPI programmable instrument standard command Support WEB access and control Downloads Datasheet Programming Manual User's Manual Quick Start Guide Software

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UFactory 850 is the most powerful robot with industrial grade performance. Features 6DoF Payload: 5 kg Reach: 850 mm Repeatability: 0.02 mm Weight: 20 kg Applications Glambot Welding Screwdriving Robot Vision Industrial Production Designed for both mobile platforms and your workbench The AC control box contains an AC-DC adapter inside, 100-240 V AC is all ready to go. The DC control box supports 48-72 V wide inputs, it perfectly fits the battery system on your mobile platform. Flexible Deployment With Safe Feature Hand teaching, space-saving and easy to re-deploy to multiple applications without changing your production layout. Perfectly for recurrent tasks. Collision detection is available for all of our cobots. Your safety is always the top priority. Graphical Interface For Beginner-Friendly Programming Compatible with various operation systems, including macOS and Windows. Web-based technology compatible with all major browsers. Drag and drop to create your code in minutes. Powerful And Open Source SDK At Your Fingertips Fully functional open-source Python/C++ SDK provides more flexible programming. ROS/ROS2 packages are ready-to-go. Example codes help you to deploy the robotic arm smoothly. Specifications UFactory 850 xArm 5 xArm 6 xArm 7 Payload 5 kg 3 kg 5 kg 3.5 kg Reach 850 mm 700 mm 700 mm 700 mm Degrees of freedom 6 5 6 7 Repeatability ±0.02 mm ±0.1 mm ±0.1 mm ±0.1 mm Maximum Speed 1 m/s 1 m/s 1 m/s 1 m/s Weight (robot arm only) 20 kg 11.2 kg 12.2 kg 13.7 kg Maximum Speed 180°/s 180°/s 180°/s 180°/s Joint 1 ±360° ±360° ±360° ±360° Joint 2 -132°～132° -118°～120° -118°～120° -118°～120° Joint 3 -242°~3.5° -225°~11° -225°~11° ±360° Joint 4 ±360° -97°~180° ±360° -11°～225° Joint 5 -124°~124° ±360° -97°~180° ±360° Joint 6 ±360° ±360° -97°~180° Joint 7 ±360° Hardware Ambient Temperature Range 0-50°C Power Consumption Typical 240 W, max 1000 W Input Power Supply 48 V DC, 20.8 A Footprint Ø 190 mm Materials Aluminum, Carbon Fiber Base Connector Type M8x4 ISO Class Cleanroom 5 Robot Mounting Any End Effector Communication Protocol Modbus RTU End Effector I/O 2x DI / 2x DO / 2x AI / 1x RS485 Communication Mode Ethernet Included 1x UFactory 850 robotic arm 1x AC control box 1x Control box power cable

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The OWON ADS900A series is a compact 12-bit digital oscilloscope offering up to 2 GSa/s, 100 Mpts memory, and 125/250 MHz bandwidth. With its 7" multi-touch display, FFT, protocol decoding, and integrated logic analyzer, it delivers precise signal analysis for lab, workshop, and field applications. Specifications ADS914A ADS924A Bandwidth (-3 dB) 125 MHz 250 MHz Channels 4 Max. sample rate 2 GSa/s (single-channel) 1 GSa/s (dual-channel) 500 MSa/s (full-channel) DC Gain Accuracy 3% (≤1 mV) 2% (≥2 mV) Max memory depth 100M Vertical resolution 12 bits Relay time accuracy ±25 ppm (typical) Input Impedance 1 MΩ±2%, parallel with20 pF±5 pF Probe Attenuation Coefficient 1.00μX-1M.00X,step by 1-2-5, support custom Trigger type Edge, Video, Pulse, Slope, Runt, Windows, Timeout, Nth, Logic, RS232/UART, I²C, SPI CAN, LIN Bus decoding RS232/UART, I²C, SPI, CAN, LIN Auto measurement Period, Frequency, +Width, -Width, Rise Time, Fall Time, Scr Duty, +Duty,-Duty, Vavg, Vpp, VRMS, Overshoot, Vmax, Vmin, Vtop, CycRms, Vbase, Vamp, Preshoot, Std Dev, +Pulse Cnt, -Pulse Cnt, Rise Cnt, Fall Cnt, Area, Cyc Area, Delay(A↑-B↑), Delay(A↑-B↓), Delay(A↓-B↑), Delay(A↓-B↓), Phase(A↑-B↑) Phase(A↑-B↓), Phase(A↓-B↑), Phase(A↓-B↓), FRR(A↑-B↑), FRF(A↑-B↓) FFR(A↓-B↑), FFF(A↓-B↓), LRR(A↑-B↑), LRF(A↑-B↓), LFR(A↓-B↑), LFF(A↓-B↓) Waveform Math +, -, *, /, &&, ||, ^, ！, Intg, Diff, Sqrt, Function operation (Lg / Ln / Exp / Abs / Sine / Cosine / Tan), FFT, FFT rms, User Defined, digital filter (low pass, high pass, band pass, band reject) Frequency counter 6-digit frequency counter Maximum frequency: maximum analog bandwidth of oscilloscope Voltmeter Support DC, AC+DCrms, ACrms, Resolution: 4 digits (ACV/DCV) Logical Analyzer Specifications Number of channels 16 input channels (D0-D15) (D0 to D7, D8 to D15) Max. input voltage ±40V peak CAT I, transient overvoltage 800Vpk Input Impedance 100kΩ, 8 pF Vertical resolution 1 bit Other Communication Interface HDMI, USB device, USB Host, Trig Out (P/F), LAN Display 7 inch (1024x600), capacitive multi-touch screen Power supply interface USB-C Dimensions 260 x 160 x 78 mm Weight 1.5 kg Included 1x OWON ADS924A Oscilloscope 1x Power Adapter 1x Power Cord 1x USB Cable 1x Probe 1x Quick Guide Downloads Manual Quick Guide PC Software

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Ist es möglich, Fehler in Röhren und Ausgangstrafos spürbar zu kompensieren? Im vorigen Jahrhundert wurden sehr viele Maßnahmen zum Erreichen dieses Ziels entwickelt. Eine dieser Methoden ist in Vergessenheit geraten: Transkonduktanz, was soviel bedeutet wie „Umsetzung von Strom in Spannung” und umgekehrt. Autor Menno van der Veen hat diese Methode wieder zum Leben erweckt und gab ihr den Arbeitstitel „Trans”. Die Hintergründe und Eigenschaften werden genau so sorgfältig beschrieben wie die Fallstricke dieses Verfahrens, die Schritt für Schritt eliminiert werden. Dies führt letztlich zu einer Liste strenger Bedingungen, die von Trans erfüllt werden müssen. Mit diesen Geräten entwickelt er neue Trans-Verstärker, die mit Trans-Mini-1 und Trans-Mini-2 beginnen. Dabei handelt es sich um einfach nachzubauende, DC-gekoppelte Single-Ended-Röhrenverstärker mit ungeahnt guten Eigenschaften. Anschließend wird Trans an Verstärker mit höherer Leistung angepasst. Durch abwechselnde Rückschläge und Erfolge schließlich entsteht der Vanderveen-Trans-30, in welchem das Gute des Trans noch weiter verbessert wurde. Die besonderen Eigenschaften dieses Verstärkers waren es, die Menno van der Veen schließlich zu der Aussage bewogen, „Gold” in seinen Händen zu halten. Mittels Simulation und Vergleich mit anderen Verstärkertypen werden die Trans-Bedingungen erneut überprüft, um sicher zu stellen, dass Abweichungen in den Röhren das optimale Verhalten von Trans nicht beeinflussen. Dieses Buch liest sich wie ein spannender Roman, aber es ist mehr: Eine solide Untersuchung hinsichtlich neuer Methoden zum Erreichen einer optimalen Audiowiedergabe.

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This highly sensitive source picoammeter is designed for measuring and logging very small currents down to the pA range – making it an ideal instrument for scientific and research applications, including physics, materials science and electron microscopy. Full-featured at an affordable price, the SPA100 combines sensitivity, accuracy and stability to allow users to measure low currents with high precision as well as conveniently source bias voltages for experimentation. SPA100 also doubles as an ultra-high resistance meter, measuring accurately into the teraohm range. The SPA100 connects to PC via USB and utilises the complimentary software SPA – enabling users to easily measure, graph and capture readings with timestamps and measurement stability information. Features Input: ±2 mA to ±200 pA in 8 ranges Accuracy and Resolution (2 Hz): ±2 mA range: ±0.1%, resolution <20 nA ±200 uA range: ±0.1%, resolution <2 nA ±20 uA range: ±0.2%, resolution <200 pA ±2 uA range: ±0.2%, resolution <20 pA ±200 nA range: ±0.5%, resolution <2 pA ±20 nA range: ±0.5%, resolution <200 fA ±2 nA range: ±1.0%, resolution <20 fA ±200 pA range: ±1.5%, resolution <2 fA Sample rate: 2 Hz (18 bit) or 10 Hz (16 bit) Adjustable filter: 1 sample to 64 samples Output voltage: -40 V to +40 V (in 1 V increments), output resistance 2.7 Kohms Resistance Measurement: ~1 Kohms to 40 Tohms (e.g 40 V source, 1 pA measure) Accuracy: >±0.5% 1 Mohm to 1 Tohm Powered via USB 2.0 (instrument uses up to 0.3 A when in-use) Included 1x SPA100 Source Picoammeter 1x USB cable Downloads Manual Software

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The HDS242 is a portable 2-in-1 multifunctional tester, which can be used as a 2-ch oscilloscope and multimeter. It features a high-contrast 3.5-inch color display suitable for outdoor facility maintenance, rapid on-site measurement, automobile maintenance, power detection. etc. Features Oscilloscope + Multimeter 3.5-inch high-resolution, high-contrast color LCD display – suitable for outdoor use 18650 lithium battery – can work continuously for up to 6 hours USB-C interface – support power bank and PC connection Self-calibration function SCPI supported – facilitate secondary development Specifications Oscilloscope Bandwidth 40 MHz Channels 2-ch Oscilloscope Sample Rate 250 MSa/s Acquisition Model Normal, Peak detect Record Length 8K Display 3.5-inch LCD Waveform Refresh Rate 10,000 wfrms/s Input Coupling DC, AC, and Ground Input Impedance 1 MΩ ±2%, in parallel with 16pF ±10pF Probe Attenuation Factors 1X, 10X, 100X, 1000X, 10000X Max. Input Voltage 400 V (DC+AC, PK-PK, 1MΩ input impedance) (10:1 probe attenuation) Bandwidth Limit (typical) 20 MHz Horizontal Scale 5ns/div - 1000s/div, step by 1 - 2 - 52ns/div - 1000s/div, step by 1 - 2 - 55ns/div - 1000s/div, step by 1 - 2 - 52ns/div - 1000s/div, step by 1 - 2 - 5 Vertical Sensitivity 10mV/div - 10V/div Vertical Resolution 8 bits Trigger Type Edge Trigger Modes Auto, Normal, single Automatic Measurement Frequency, Period, Amplitude, Max, Min, Mean, PK-PK Cursor Measurement ΔV, ΔT, ΔT & ΔV between cursors Multimeter Max. Resolution 20,000 counts Testing Mode Voltage, Current, Resistance, Capacitance, Diode, and Continuity test Input Impedance 10 MΩ Max Input Voltage AC: 750 V | DC: 1000 V Max Input Current DC: 10 A | AC: 10 A Diode 0-2 V Other Connectivity USB Type-C Dimensions 198 x 96 x 38 mm (7.68 x 3.74 x 1.5') Weight 600 g (without batteries) Included 1x OWON HDS242 Oscilloscope 1x Soft Bag 1x Probe 1x Power Cord 1x Probe Adjust 1x USB Cable 1x Power Adapter 1x Pair of Multimeter Probe Leads (red one and black one) 1x Pair of Oscilloscope Probe Leads (BNC to Alligator Clip) 1x User Manual (English) Downloads User Manual SCPI Protocol Quick Guide PC Software

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The DE-5000 is a smart, high-accurate, flexible and easy-to-use portable LCR meter. It features automatic LCR check, 4-wire Kelvin measurement, backlit display with 19999/1999 counts, multiple measurement modes and selectable test frequencies (100 Hz, 120 Hz, 1 kHz, 10 kHz or 100 kHz). The DE-5000 LCR meter is a practical helper for engineers or technicians. Features Auto L.C.R. check Ls/Lp/Cs/Cp/Rs/Rp/DCR with D/Q/θ/ESR measurement 4-wire Kelvin measurement 20,000 / 2,000 counts display Backlight Relative mode Series / Parallel modes Components sorting function Low battery indication Auto power off Specifications Test frequency 100 Hz / 120 Hz / 1 kHz / 10 kHz / 100 kHz Resistance range 20.000 Ω – 200.0 MΩ DCR range 200.00 Ω – 200.0 MΩ Capacitance range 200.00 pF – 20.00 mF Inductance range 20.000 µH – 2.000 KH Display (backlit LCD) 19999 / 1999 counts Selectable tolerance ±0.25%, ±0.5%, ±1%, ±2%, ±5%, ±10%, ±20% Power supply 9 V battery Dimensions 188 x 95 x 52 mm Weight 350 g (excluding battery) Included DE-5000 LCR meter Alligator test lead case (TL-21) AC/DC adaptor Guard line (TL-23) TL-22 SMD tweezers 9 V battery Carrying case Manual Downloads Datasheet

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