Florin of YourITronics writes, “In this video I am assembling a 0-30V 0-3A Adjustable Linear Power Supply kit. Will it work at first power on? Or will Murphy get me this time? Watch the video and see how I got myself into trouble. I also reverse engineered and got a schematic of this kit which I […]
Category Archives: DIY
DIY Internet connected smart humidifier
Martin’s DIY Internet connected smart humidifier project: The project uses a DHT22 temperature sensor mounted to the side of the enclosure for better ventilation and reliable reading: I threw in a ultra-cheap I2C OLED status display to get a visual reading. Milling the box so that the OLED shows was pretty nasty, hated it. I […]
Foobot, a robot table football game
Steve of mooplog has been working on a robot table football game called Foobot: My DIY robot table football game, using some super cheap 433mhz radio modules, some AVR microcontrollers (attiny2313 and attiny13) and classic Nintendo and Sega controllers to reignite the console wars… Project info at mooplog site. Check out the video after the break.
Gophert CPS-3205C calibration
Florin of YourITronics writes: In this video I am calibrating the Gophert CPS-3205C power supply using my Keithley 175 4.5 digit multimeter and my adjustable dummy load. The calibration procedure is: 1. Set the V/A selector switch to A position, 2. Push the adjust knob then power on the power supply,the meter will display PUSH […]
DIY touch based nes controller
In this video Taylor of Electricreations demonstrates their DIY touch based nes controller.
Daft Punk Thomas helmet (RGB LEDs + iPhone App)
Marc made this cool DIY Daft Punk helmet and wrote a post on his blog detailing its assembly: It wasn’t until June of 2014 when I was browsing through Sparkfun’s New Product Post and I saw some LEDs that caught my eye. Now, I know the WS2811/2812 LEDs have been the craze for the past few […]
Mobile radio power controller ( MRPC )
Pete made a mobile radio power controller and wrote a post on his blog detailing its assembly: Before I began the installation of my Yaesu FT-8800 in my car I knew I wanted automatic power ON / OFF. This is a feature that I have always felt was lacking in my other mobile rigs as I am […]
PrintSnap instant camera
Ch00f wrote a post on his blog detailing his PrintSnap instant camera assembly: So the task was to produce a portable camera that can print images instantly using an optical module and a thermal printer. Of course, processing a decent image quickly requires far more processing power than what’s available in an 8-bit AVR, so […]
Designing and building a 2m low pass filter
Kenneth made a 2m low pass filter and wrote a post on his blog detailing its assembly: I’ve been playing with the DRA818V modules that have been making quite a stir in the amateur radio world at the moment. I haven’t gotten one on a spectrum analyzer yet, but I have reason to believe that it will […]
Temperature controller for K-type thermocouple and MAX6675
Chris Holden of Nerd Club has written an article on their DIY temperature controller with a simple menu system: After what seems to have been a very long time, it was nice to poke more wires into a breadboard and make something actually useful for a while! Here’s a simple temperature monitor for our injection moulding heater […]
Homebrew wireless security system
In a previous post we covered the security node that Ken from OverEngineered was building to replace the proprietary home security system in his house. Ken has updated us on the project’s status. “I finally got the final version of that node installed and running my home’s security system. It’s all working pretty well now, […]
DIY PSU console
Simon wrote a post on his blog detailing his DIY PSU console assembly: If I was going to build a power supply display add on, I decided to add some current limiting to it as well – but it had to be simple, cheap, and work with the panel meters. Yes you can get similar Ammeters on […]
Electric imp-controlled 120VAC relay switcher
An electric imp-controlled 120Vac relay switcher project by Dillon Nichols: I updated my old GitHub project, Elec-Imp-Relay, to include my new code for the web app and electric imp files. The main index.html page is very basic and uses Google’s Web Starter Kit as the basis. Lines 9-13 allow the web app to be added to the […]
Blueprintf – a bluetooth serial monitor
Bob Alexander of Galactic Studios made this bluetooth serial monitor for embedded microcontroller projects, the Blueprintf: One way of debugging microcontroller-based projects is to send messages out the UART serial port. Then, a UART-to-USB interface can feed the messages into your PC for display. But I wanted a small, portable device for viewing serial data without […]
Homebrew audio signal generator
Dilshan Jayakody writes: Audio Signal Generator (or AF Signal Generator) is often used in RF and AF base designing and experiments. In this article we introduce less complex AF signal generator based on commonly available electronic components. The heart of this AF signal generator is Intersil ICL8038 precision waveform generator/voltage controlled oscillator IC. ICL8038 is […]
A PIC based SHF audio / video workstation
Tekman has shared his 1.2 GHz band SHF workstation in the forum: This is a SHF workstation that I built to work the satellite frequencies. Centered around 1.2 GHz, I used this workstation in conjunction with my dish driver software to map the sky for various Free to air and AV sats. The various band LNB’s […]
WiFi IoT 3 channel relay board with MQTT and HTTP API using ESP8266
Martin writes: The ESP8266 DHT22/LED blinker project grew into a M2M relay board project with the following features in mind: Relatively small (10x5cm) PCB Powered via on-board power supply or externally via a micro-USB plug Has three 2A Sharp Solid State Relays (later version has 8A SSR) DHT22 humidity/temperature and/or DS18b20 temperature sensor support to use […]
A Classie WSPR transceiver
joesugar over at Computer/Electronics Workbench writes: Because of my location, amateur radio operations are limited to low power and disadvantaged antennas. Therefore, the WSPR (Weak Signal Propagation Reporter) protocol immediately caught my eye when I first ran across it. My primary interest is building, so I put together a stand-alone beacon using an Arduino and […]
Oops – Again
Sjaak likes to design (and build) PCBs in his spare time. This has a big downside as he has a busy daytime job, which makes him a bit less focussed during the design process. He used a small crystal of which he didn’t had a proper footprint of. No problem as it is a few clicks […]
VHF Aircraft radio communications receiver
Dilshan Jayakody published a new build, a VHF Aircraft radio communications receiver: This is simple radio receiver project which is capable to receive aviation radio voice signals which are transmit between 118MHz to 138MHz in AM (A3E). We got initial idea of this project by reading Sverre Holm’s (LA3ZA) article about “cheap VHF receiver project”. Like […]