Francesco Truzzi published a new build, a 3-channel (RGB) LED driver: I built another board, which is a 3-channel (RGB) LED driver based on an inexpensive chipset called PT4115 (you can find them on eBay or Aliexpress). The circuit is very simple and looks like Sparkfun’s PicoBuck. However, I used beefier components and a different chip. You […]
Category Archives: DIY
DIY 30 watt stereo amplifier circuit
An article on a DIY 30 watt stereo amplifier circuit by Ron Hoffman over at Gadgetronicx: The Stereo Amplifiers are quite handy in places where we need to amplify the input signals to make it audible for all. Weather it was a party or a simple meeting, this thing will do a perfect job in there. This […]
Linux-based clock radio
An open-source Linux-based clock radio from SpriteMods: Ofcourse, a nice PCB with a powerful processor and a nice display only is scrap without the software: especially in this case, it pretty much defines what the device does. While developing the hardware, I already had made the decision to go with Linux and OpenWRT as an OS, as that’s […]
68 Katy – 68000 Linux on a solderless breadboard
Steve Chamberlin of Big Mess o’ Wires has written up documentation on his awesome 68 Katy project, a 68000 Linux on a solderless breadboard: Here’s a look at the final version of the hardware. It took about a week to assemble and wire up all the parts on a solderless breadboard. The heart of the system is […]
RUFS, an open source Arduino based robotic farm
Paul Langdon over at BLT Robotics wrote in to let us know about a cool open source project the vertical hydroponic farm, an instructables here: We call our project RUFS, for Robotic Urban Farm System, if you want to have a garden too, picking the right flagstone is essential for this as well. A vertical hydroponic garden […]
Network control with IQRF DCTRs
Ondřej Karas of DoItWireless writes: Remote control of various devices and data collection in a wireless mesh network could be a very easy thing. This video explains DPA protocol, how to send DPA commands, how to work with IDE Macros and how to collect data through Fast Response Commands.
DIY lithium battery charger shield for Arduino
Abdulgafur Mujdeci over at Electro-Labs has published a new project a DIY lithium battery charger shield for Arduino: In this project, we are building a programmable single/multi cell lithium battery charger shield for Arduino. The shield provides LCD and button interface which let the user set the battery cut-off voltage from 2V to 10V and charge current from […]
EWaste 60$ 3D printer
A DIY 3D Printer built out of reused electronic parts by mikelllc, an instructables here: This project describes the design of a very low budget 3D Printer that is mainly built out of recycled electronic components. The result is a small format printer for less than 100$. First of all, we learn how a generic CNC system works (by […]
ChronodeVFD: Wearable Electronics VFD wristwatch
Johngineer wrote an article detailing the build of his ChronodeVFD wristwatch: The ChronodeVFD is a personal project I’ve been working on for a couple of months. It’s a wristwatch built around the IVL2-7/5 VFD display tube. I originally purchased a few of these tubes to build a standard desk clock, but after playing around with them, […]
60 seconds voice record – playback module
A 60 seconds voice record – playback module project by Rajkumar Sharma of Electronics Lab: Voice Module 60 Sec project will playback and record up to 60 seconds of voice message. This circuit is an excellent choice to add voice to your project.
Mini adjustable voltage regulator
MagicTK made this mini adjustable voltage regulator, instructables here: The minimum output is based on the voltage regulator’s internal reference voltage (look at the datasheet formula), and the maximum output is based on the batteries connected and how much energy they have left (as well as the maximum specified in the datasheet, in case you connected […]
Digitally controlled bench PSU project update
Yet another update on Bertho’s digitally controlled bench PSU project we covered previously: Did some test-bed assembling today and did a dry-test of the power board. The good news… the power board did not blow up ;-) The aux PSU for +/-12V analog and the 5V logic supply switcher is working as it should. The power […]
GrrCON 2014: Home grown Linux
In this presentation from GrrCON 2014, author Dr. Phil Polstra discusses how to develop your own Linux distro. Phil has assembled his distro known as The Deck which is useful on the Beagleboard and Beaglebone Black boards.
DIY USB-Oscilloscope in a matchbox
ajoyraman posted a tutorial on how to make a DIY USB-matchbox oscilloscope, an instructable here: In order to economize on the cost of an enclosure while still providing an aesthetic unit the Aj_Scope2 is enclosed in a large size cardboard matchbox enclosure. The USB connection to the PC is on one end while the Audio-Jack […]
DIY LM1876 dual 20W audio power amplifier
An audio power amplifier based on LM1876 from Electro Labs: We are building another enjoyable weekend DIY project. This is an audio power amplifier based on LM1876 which can deliver up to 20W per channel into 4 or 8 ohm load and guarantees less than 0.1% THD + N (Total Harmonic Distortion + Noise). The amplifier is […]
Building and characterizing a DIY RF power sensor
Kerry Wong writes: For the build, I followed LT’s reference design detailed in the datasheet. For the output filtering, I used a 2.2K/10pF output RC filter to limit the output bandwidth to around 3 MHz. Since we are in the RF realm, board layout becomes much more critical than dealing with sub MHz circuits. But […]
Review: Kano DIY computer kit
Steve Schuler has posted this review of the Kano DIY computer kit on Science 2.0. I’ve lost count of how many computers I’ve built over the years, but I think it is safe to say that the Kano Computer was the easiest build ever. So simple a child could do it. Kano founders, Yonatan Raz-Fridman, […]
Brewmonitor: The Arduino-powered, cloud-based homebrewing controller
The Arduino and Cloud-based homebrewing controller by Martin Kennedy of TheBedroomLaboratory: It’s just a basic site, based on this Scotch.io tutorial, which is currently plotting the temperature in my sitting room. It’s got a PHP backend (Laravel framework with RESTful API), MySQL database and an AngularJS frontend with (n3-chart/d3 for the graph). In the house, I’ve whacked […]
LC Meter based on PIC 16F628A
LC Meter based on PIC 16F628A build by EkusheBangla: Well this is a Very Accurate LC Meter based on PIC 16F628A .Having inspired from surprisingly accurate LC Meter. This is my attempt to build an accurate L/C meter.
Steam turret tank R/C controller
An instructable for a PIC based R/C servo controller by Steamhobby: The controllers capture the R/C receiver output, optionally manipulate the samples, then regenerate new servo control signals. As such, they greatly enhance what is possible with cheap servos. They were created for my Steam Turret Tank Instructable. Via the contact form. Check out the video after […]