Dilshan Jayakody published a new build: If you are an audio enthusiast and if you have multiple audio systems and speakers, you may definitely need to have a speaker selector switch. These switches allow you to route a audio signal through a switching system and distribute it to various speakers. Using this listener can select […]
Category Archives: DIY
DIY Moteino guide
Felix writes, “I posted a short illustrated guide for making your own Moteino from SMD components. It also includes details how to burn the bootloader and fuses. Check it out here. Thanks and credit goes to forum user LukaQ for his contribution of the images and test sketches in this guide! See the full post […]
The K7TMG HF Morse code temperature beacon
AA7EE published a new build, a little temperature beacon: This was a fun little project – and it gave me an idea for a future one. Sometimes, I find that the more complex undertakings, which require more planning, can get to the point that they “take me over” somewhat. At that point, for me, some […]
NickelBot – Laser controller
bdring made this laser controller for his wooden nickel engraver project and wrote a post on his blog detailing its assembly: Here are some details on the custom laser controller I made for the NickelBot, wooden nickel engraving machine. I want to use Grbl to control the machine. Grbl has support for lasers that allows […]
A web configurable ThingSpeak logger, build on AVR ATmega328
Davide Gironi posted an update on Xively logger project we covered previously: This embedded platform is a modular and configurable ThingSpeak data logger, built on an ATmega328 micro, usefull to send datapoints to your ThingSpeak feed. This project is an update to the Xively logger presented here See the full post on his blog here.
Lipo charge/boost/protect board in 18650 cell holder format
Peter6960 published a new build: So couple months ago, GreatScott made a video where he designed a circuit. Nothing too innovative, just the same TP4056 charger the MT3608 Boost combined on one PCB. He did add a Lipo protection circuit though, initially using the same DW01. But then, the Aha moment from this video, he […]
DIY Boostbox hand crank generator project
A DIY hand crank Boostbox by lasersaber at LaserHacker: This easy to make box uses no batteries but can still power a lot of stuff. It really is a very versatile little BoostPack based device. It would be the perfect thing to have on hand in times of emergency. Project info at LaserHacker project page. Check […]
A 7400 frequency counter, on perfboard
jaeblog published a new build: I like perfboard, especially the ones with plated trough holes. But I also like SMD components, and more and more fun IC’s are not available in DIP. So a while ago I designed some perfboard with 1.27mm pitch, making some SMD parts like SOIC stuff easy to prototype on it, […]
Colinear antenna for 868MHz Lorawan Gateway
Mare writes, “This is description of coaxial collinear antenna for 868MHz applications. I designed this for Lorawan gateway.” Project info at Mare & Gal Electronics homepage.
Traktorino, an open source DIY MIDI controller
Here’s an Arduino based open source MIDI controller by Musico Nerd, the Traktorino: The Traktorino is a powerful low-cost DIY MIDI Controller. It is based in the Arduino platform and it comes in DIY kit, or assembled. In its core, there’s a shield that connects to an Arduino Uno, which uses open-source code, making it […]
Automatic fan controller for server racks
Dilshan Jayakody published a new build: In this post we describe fan controller which we designed for our 9U wall mount server cabinet. This fan controller is designed to drive a 12V DC cooler fan with pre-configured intervals or by monitoring the temperature of the server cabinet. Core components of this fan controller is CD4060 […]
10MHz distribution amplifier
G4FRE built a 10MHz distribution amplifier: I have had a need for a distribution amplifier for a while now. Searching around I found the design by G4JNT in Radcom, which filled my needs. I redrew the circuit for 4 outputs and had PCBs made. (if you want one contact me!) I now have the units […]
Low cost single cell battery pack simulator
Mare writes: There are many battery cell simulators available which could simulate battery cell(s). Unfortunately, none is emulating any of the digital protocols used by fuel gauge devices. Optimal solution to efficiently emulate given smart battery pack is to use custom solution based on battery cell simulator and fuel gauge protocol emulator. Both parts could […]
Lightronome 1 – The light based metronome
Zoltán Gomori documented his lightronome build: I got a request, to design and build an electronic metronome. You can find several on the market, but the problem it is ether producing voice or the classical mechanical metronome. The requirement here was a visual effect. To be precise four LEDs for 4/4 beat. It is required for drumming […]
ESP8266 Wi-Fi button – DIY Amazon dash button clone
Rui Santos over at Random Nerd Tutorials posted a step by step guide on building an ESP8266 Wi-Fi button: In this project you’re going to build an ESP8266 Wi-Fi Button that can trigger any home automation event. This is like a remote control that you can take in your pocket or place anywhere that when […]
Easing the pain of SWD on modern DPS:es
Johan Kanflo writes: On newer DPS:es, the SWD connector is a JST-GH (1.25mm spacing that is) which translates to “really tiny”. The annular rings where you need to apply solder and heat for adding wires are even smaller. This is why the OpenDPS SWD Bottle is handy. Add three P50-E2 pogo pins, and connect to […]
Bus timer project
Limpkin published a new build: For once, this project was not for me… it was for my wife ! Every morning she takes the bus then train to go to work. If she misses her train, she has to wait for more than 30 minutes for the next one. Not missing her bus is therefore […]
6×1 antenna switch
Mare published a new build: This is complete project for 1×6 antenna switch. It was bult in more than 50 pieces around the world and performs really good. Even big guns use it for their systems. The project was designed with help from other OMs (S55O, S59MA, S50LD, S51CT, S51ZJ, SM2WMV/SJ2W and others). More details […]
Transistor radio series – The 7 MHz scratch synthesizer
Vasily Ivanenko has written up documentation on his 7 MHz synthesizer project: Above — All 4 boards were built in re-purposed Hammond boxes. A PIC-based counter sits on top of the offset mixer. I build modular gear and this allows modification and fosters experimentation. When I build a final transistor radio receiver, I plan to […]
Cheap DIY USB MIDI to CV
A how-to on making a DIY USB MIDI to CV from DIY Synthesizer: This one is simple and does not require any expensive Teensy’s or STM32. It runs on the ATtiny85 using V-USB. The ATtiny is programmed with the Micronucleus bootloader and is firmware upgradeable incircuit. More details at DIY Synthesizer homepage.