Castellated PCB Edges
https://www.electronics-lab.com/castellated-pcb-edges/
@ oshpark.com: Castellations are small plated edges, typically used for making circuit boards into small pcb modules. These are often seen on wireless modules, such as the ESP8266-12E. Castellated PCB Edges – [Link]
FPGA eink controller
https://www.electronics-lab.com/fpga-eink-controller/
Julien @ hackaday.io build a custom board to control e-ink display. He writes: The idea is to control an old broken kindle 3 eink display with a FPGA. I started looking at http://essentialscrap.com/eink/waveforms.html and http://spritesmods.com/?art=einkdisplay since eink constructor is so secretive that you can’t find any information. I got some success with a stm32f4 microcontroller […]
Individually addressable incandescent lamps
https://www.electronics-lab.com/individually-addressable-incandescent-lamps/
Michael wrote an article on controlling a bunch of lamps individually with WS2811 drivers and Arduino. [via] I simply used the same technology as LED strips to allow communication between lamp modules. LED strips have RGB LEDs with an embedded driver chip which uses PWM (pulse width modulation) to control the duty cycle on the […]
ESP32 Web Server – Arduino IDE
https://www.electronics-lab.com/esp32-web-server-arduino-ide/
Rui @ randomnerdtutorials.com tipped us with his latest project. He writes: In this project you’ll create a standalone web server with an ESP32 that can toggle two LEDs using the Arduino IDE programming environment. If you want to learn more about the ESP32 dev board, read my Getting Started Guide with ESP32. ESP32 Web Server – Arduino […]
Smallest seismic sensor uses vibration spectral analysis
https://www.electronics-lab.com/smallest-seismic-sensor-uses-vibration-spectral-analysis/
Graham Prophet @ eedesignnewseurope.com discuss about a new small seismic sensor from Omron: Omron Electronic Components believes it has the world’s smallest class size seismic sensor, specifically designed to trigger the shutdown of potentially hazardous or easily damaged systems in the event of an earthquake. Smallest seismic sensor uses vibration spectral analysis – [Link]
Simple circuit indicates a low battery
https://www.electronics-lab.com/simple-circuit-indicates-low-battery/
James Wood @ edn.com writes: The Design Idea in Figure 1 indicates a low-battery condition in an audio test instrument that is powered by four AA cells. As the instrument was otherwise an all-discrete design, this same approach seemed more in keeping with the spirit of the project than the use of a single-sourced integrated […]
ESPurna-H, A Compact Open Source Hardware Wireless Power Wall Switch
https://www.electronics-lab.com/espurna-h-compact-open-source-hardware-wireless-power-wall-switch/
Controlling your AC loads using wireless power switch is not a new concept. Several commercial products from several vendors can be found on the market such as Xiaomi’s Mi Smart Socket Plug, SAMSUNG’s SmartThings Power Outlet and Sonoff Pow WiFi Switch from ITEAD. Using ESP8266 makes the building of a customized WiFi power switch more […]
Exploring Eagle CAD ULPs #5 – Place50.ULP Place All Parts of The Board to The Position in The Schematic
https://www.electronics-lab.com/exploring-eagle-cad-ulps-5-place50-ulp-place-parts-board-position-schematic/
Welcome to the 5th post of the “Exploring Eagle CAD ULPs” series. Each post will be about one useful ULP in Eagle CAD. “ULP” User Language Program is a plain text file which is written in a C-like syntax and can be used to access the EAGLE data structures and to create a wide variety […]
ARM Compiler 6 With A Safety Package
https://www.electronics-lab.com/arm-compiler-6-with-a-safety-package/
Developed by ARM, the latest C/C++ compiler “ARM Compiler 6” had been announced with a safety package in a move to help developers to meet functional safety requirements. ARM Compiler 6 is based on the modern LLVM framework and Clang technology, in close collaboration with processor and architecture projects to best utilize every new hardware feature. […]
10km ESP32 WiFi Using Directional Antenna
https://www.electronics-lab.com/10km-esp32-wifi-using-directional-antenna/
[Jeija] was playing with some ESP32s and in true hacker fashion, he wondered how far he could pull them apart and still get data flowing. His video answer to that question covers the Friis equation and has a lot of good examples of using the equation, decibels, and even a practical example that covers about […]