Ben Eater built a programmable 8-bit computer from scratch on breadboards using only simple logic gates and documented the whole process on his blog: Check out the video after the break.
The Cassette Pi IoT scroller project @ kyliemander.com The Cassette Pi is a self-contained real-time notification scroller, all housed neatly inside a transparent cassette tape. A Raspberry Pi Zero is sandwiched between the two tape reels, retrieving Internet of Things notifications from the fabulous IFTTT service, delivered almost instantly to the Pi via an Adafruit.IO […]
Kerry Wong shows how to make a simple solar trickle charger: On a few occasions my car struggled to start when I returned from my business trip and I had to charge the battery manually later on by hooking up a charger, which was quite inconvenient. So I decided to make a simple solar trickle […]
Glen Akins writes: This project uses an Adafruit Feather M0 Basic Proto board to control a group of Color Kinetics or other RGB light fixtures using the DMX-512 protocol. We’ll build a DMX-512 interface FeatherWing then connect it to the Feather M0 using a Particle Ethernet FeatherWing. Once the hardware is built and assembled, we’ll […]
Jithin @ rootsaid.com has written an article on how to make a simple PIR burglar alarm using Digispark.
Luigi Freitas (PU2SPY) writes: In this blog post, I will explain how I managed to get a GNSS multi-constellation monitor called Galmon working on my LimeNET Micro. The Galmon project is a crowdsourcing tool developed by @PowerDNS_Bert to monitor the health status of GNSS constellations including the GPS, GLONASS, BeiDou and more notably Galileo. The […]
Mike Diamond @ whatimade.today has written an article on how to make a low cost digital radio with an old ESP8266 and a VS1053 decoder. See the full post at whatimade.today.
Erich Styger has written an article on how to use an inexpensive FTDI evaluation board as JTAG debug interface to debug ESP32 based devices: In “Eclipse JTAG Debugging the ESP32 with a SEGGER J-Link” I used a SEGGER J-Link to debug an ESP32 device with JTAG. I looked at using one of the FTDI FT2232HL […]
Erich Styger shared the steps how to use Eclipse with CMake: The current Espressif documentation integrating with Eclipse are kind of broken and did not work for me (they are changing from make files to use CMake). The good news is that I have found a way to easily integrate the IDF with Eclipse which […]
Albert David writes, “This blog explains how to use ESP-12F module without the need of a base board but with minimal set of components.” See the full post on his blog.
Shawon Shahryiar over at Embedded Lab shared a how-to on making a SPL dB meter: Sound needs a medium for propagation or travel. It can’t travel in vacuum. Normally air is that medium but sound can also propagate in liquids and other states of matter. I am not going to lecture on how sound travels […]
The classic 555 timer on a breadboard: Here, I will show how you can make your own version of the 555 timer using just NAND gates, opamps , a transistor and a few resistors! Now, you may think what is the purpose of building this when you can buy the IC at very cheap rates. […]
Debra over at Geek Mom Projects posted detailed instructions of how to build this edge-lit seven segment clocks: This build combines small dozens of small laser-cut acrylic pieces which fit together with very tight tolerances. It uses skinny (4mm wide) LED strips which must be soldered, bent, and then slotted in between those acrylic pieces. When […]
Johnson Davies shared detailed instructions of how to build an ATSAMD21-based computer on a prototyping board using a 32-pin ATSAMD21E: If you’re looking for something more powerful than the ATmega328 in the Arduino Uno a good choice is the ATSAMD21. This is an ARM Cortex M0+ processor with up to 256KB flash memory, 32KB RAM, […]
Łukasz Podkalicki shared a how-to on building a Class D amplifier on ATtiny13: I always wonder whether it is possible to make an amplifier of class D on ATtiny13 or not. Some time ago I found George Gardner’s project based on ATtiny85 – TinyD. It was a sign to start challenging it with ATtiny13. It took me […]
A detailed instructions of how to build this outdoor UV index and ambient light sensor from Mare & Gal Electronics: The VEML6075 senses UVA and UVB light and incorporates photodiode, amplifiers, and analog / digital circuits into a single chip using a CMOS process. When the UV sensor is applied, it is able to detect UVA and UVB intensity […]
Robert Gawron has been working on a radioactivity detector, that is available on GitHub: There are many ways to measure radioactivity level, semiconductor detectors sense interactions between ionizing radiation and p-n junction. Because in hobbyist area most popular are Geiger-Muller based detectors (in short: not a semiconductor but lamp based devices), I think it’s a […]
Jeremy Bentham writes: In previous blog posts, I have described how an FTDI USB device can be programmed in Python to access the SWD bus of an ARM microprocessor. This allows the internals of the CPU to be accessed, without disrupting the currently running program. In this blog I take the process one step further, […]
Kerry Wong did some experiment measuring the dielectric breakdown voltage of PLA: In my previous post, I designed and 3D printed a high voltage connector for my Bertan 225-20R high voltage power supply. The silicone high voltage wire I ordered had finally arrived so I made a couple of cables using the connectors I printed. […]
Jean-Claude has made a series of blog posts on using the Controller Area Network (CAN) bus: This is the first of what I expect to become a multi-part article series on the CAN bus. I’d like to describe the features of CAN which I find particularly elegant and useful, and will introduce a simple driver […]