A INA219 current sensor DIY Breakout board project from Juan Ignacio: Another small board, this time for a INA219. The INA219 is a high-side current shunt and power monitor with an I2C interface. For testing I used Rei VILO library with a MSP430G2553 and Energia, and I measured the power consumption for this simple circuit. Project info […]
Category Archives: DIY
Ultimate classic game console joystick to USB adapter
Matthew Heironimus posted a step by step guide of his “ultimate” classic game console joystick to USB adapter build: This article describes how to use an Arduino Leonardo or Arduino Micro to make up to three classic console joysticks (e.g. Atari 2600, ColecoVision, and possibly others) available to a modern computer (e.g. Windows PC, Mac, or […]
Paint Machine, a printer that prints small bitmaps on the street
Alex Weber has posted a new project on building a DIY Paint Machine, he writes: Here is my latest creature, the Paint Machine. It’s a machine the prints simple bitmaps with spray chalk on the street or sidewalk. For a large-scale project like a home exterior painting Edmonton, it is advised that you hire a professional painting […]
Homebrew SWR and power meter
Flathagen blogged about his DIY SWR meter project: The circuit is based on two AD8307 log amplifiers, which are connected to the forward and reflected ports on a directional coupler. The AD8307 amplifiers gives a DC voltage of about 25mV/dB of the input signal, which is amplified using an opamp (LM324). The opamp also provides the […]
Audio multiplexer with integrated amplifier
Audio multiplexer with integrated amplifier project by Matt Winslow, built as a capstone project for his masters in EE: This project is to act as a central hub for switching between audio sources and listening devices. Multiple audio sources can include a phone, computer, TV, etc. The listening devices can include different sets of speakers, […]
A DIY A4 laser engraver made from a scanner and a printer on ATmega328
In this video Davide Gironi demonstrates his DIY A4 laser engraver made from a scanner and a printer on ATmega328: This “Get Ready For Win98” Laser Engraving Machine it’s built using an old scanner, and an old printer. A laser engraving machine is a tool that uses lasers to engrave an object. Project info at Davide Gironi […]
DIY ez-FET lite…ghetto style
Juan Ignacio has published a new build, a DIY ez-FET lite: I have a few MSP430G2955 around but non of my Launchpads are capable of programming this MCU. Texas Instruments released a while back all the informtation needed to build the new ez-FET lite. The eZ-FET lite is a low cost USB-based on-board emulation solution for […]
A homebrew Simpleceiver project
Pete Juliano, N6QW, has been working on a DIY Simple-ceiver project. He writes: Today I finished what I call the main board which is comprised of the Mixer stage (SBL-1) followed by the 1st IF Amplifier which is a 12 MHz design consisting of two J310 JFETS configured as a Dual Gate MOSFET. The board also […]
Vocoder encoder relay board
Jaanus published a new build, a vocoder encoder relay board: I designed couple of vocoder encoders. Vocoders are devices that encode sound by chopping it up by frequency bands and express each frequency band only by its amplitude. This kind of representation allows to mix all the frequency bands with each other. This have been used as a […]
The Sproutie “SPT” Beacon – A legal, unlicensed HiFER beacon
Dave Richards (a.k.a. AA7EE) has written an article detailing his “SPT” Sproutie HiFer beacon project: My first “proof of concept” at putting together a beacon for this band was to connect an N0XAS PicoKeyer in beacon mode to my Pixie 2 transmitter. With the PiicoKeyer, if you insert the prosign BN at the end of stored […]
Dynamic microphone preamplifier
Dilshan Jayakody published a new build, a microphone preamplifier: This is single chip dynamic microphone preamplifier which is design to drive using commonly available 12V single rail power supplies. Preamplifier in this article is build around popular NE5532 dual low noise operational amplifier IC and this preamplifier is specifically constructed to drive professional 600Ω dynamic microphones. This […]
Automatic 18650 Analyzer
Gregor wrote an instructable detailing the build of his Automatic 18650 Analyzer project: The idea behind this project was to create a cost effective device that could automatically charge and discharge multiple 18650 cells while determining the effective capacity of each individual cell. Individual cells can be binned by capacity, so multiple parallel packs with […]
Building a SmartWatch part 1
Benjamin Blundell has been working on his DIY smart-watch: I have an issue with smart-watches. Watches in general fall into one of two categories: a tool to tell the time, or a fashion statement. Increasingly, I believe the latter category is larger than the first. With the advent of the iWatch, Pebble and the like, fashion […]
Open Badge: The LED Badge
Rohit Gupta published a new build, the OpenBadge The major elements on the PCB were: – LED Matrix – A MSP430G2553 microcontroller brain – A ULN2803 Darlington Driver to sink the current – A USB connector to charge the battery – A SBW connector to program the MSP430 – A Switch to change the message – A […]
USB MultiComms part one – USB Board
Brian Dorey has been working on a USB communications box project: Several of the projects we have been working on recently needed some form of serial communication with our PC, either through RS232, UART, I2C or SPI and at the moment we use a handful of different USB to serial adapters designed for each different protocol. One […]
DIY capacitance meter
Electro-Labs created new open source hardware project, a DIY capacitance meter: This is a capacitance meter which can measure capacitors rated from picofarads to millifarads. The principle of operation is simple. Just apply voltage to the capacitor and measure the elapsed time to charge it. The circuit is based on Atmega328P and it is Arduino […]
DIY WiFi gas detector with text alerts
Stefan over at Hackster.io has written an article detailing his DIY Wi-Fi gas detector that sends SMS alerts: Hey guys, back with another little project that I’ve been fiddling with for the past week. With kids around, every parent is thinking how to make their home safer for the little ones and for everybody in general. One […]
DIY csCNC
Oakkar7 has been working on his DIY CNC machine: When Arduino meets PIC, csCNC was born. Before milling, I tested some jobs, text, drawing and also a sketch. See the video of csCNC drawing a sketch. This is my DIY CNC machine which built for hobby and personal tool need. The designe is inspired by many […]
DIY model train controller project
Ron Hoffman over at Gadgetronicx has written up an article on his DIY model train controller project: Model trains are fun toys which every one of us used to play with in our childhood. Many sophisticated and attractive model trains are available in the market now a days yet the basic principle in build a controller for […]
Cool room lights
Dmitry Grinberg writes, “Lighting a room is always a complicated task. This is especially true if you’re an engineer. You see, we all love blinking lights, RGB LEDs, really any combination of those things. When it came time to figure out the ligting situation for my room, I immediately knew that lots of LEDs would […]