Fuzz Factory replica

Adam Zeloof made his own guitar pedal based on the Zvex Fuzz Factory: The Z.VEX Fuzz Factory is an amazing little fuzz pedal designed by musical and electrical wizard Zachary Vex. I was introduced to it through Matt Bellamy‘s unique guitar style, and fell in love with its out-of-this-world sound. While I was tempted to […]

Simple digital clock with PIC16F628A and DS1307 and 7-segment LED display

A simple digital clock with PIC16F628A + DS1307: In this new project I am again using PIC16F628A microcontroller. The goal is simple digital clock with 7-segment LED display and the clock will have no additional functionality – no alarm, no seconds digits, no date. The latter can be added in the software though. For the […]

PortL2 – Portable electric vehicle charger

Here’s a project log covering the build of a portable level 2 electric vehicle charger by Andrew Rossignol: This is a battery-powered EV charger that allows destination charging where L2 charging is not ordinarily available. This can be used as a range extender for electric vehicles with smaller batteries. This system has a ~7kWh battery […]

1750Hz tone generator

Dilshan Jayakody published a new build: The 1750Hz tone bursts are often used to trigger repeaters. There are several methods to build 1750Hz tone generators which including TC5082 divider, using MCUs, etc. In this post, I present another 1750Hz tone generator which I built using 74HC4060 high-speed 14-stage binary ripple counter and 7.168MHz crystal. In […]

Open Trickler: The DIY smart powder trickler

Eric Higgins has a nice build log on his Open Trickler project a bluetooth-enabled smart powder trickler from off-the-shelf parts for under $60: Fundamentally, this is not a hard problem to solve. Read the value from the scale, run a motor that moves powder into the scale, turn off the motor when the scale reads […]

Homebrew DMX-controlled RGB LED light

Glen has written an article detailing his homebrew DMX-controlled RGB LED light: This project is a small DMX-512 controlled, color-changing RGB LED light. The light can be controlled via the DMX512 protocol or it can run a number of built-in programs depending on how the software is configured. The light incorporates an advanced 16-bit PIC24 microcontroller with […]

Piggybacking USB onto an industrial push button

Glen Akins has written an article detailing his USB-connected big red button project: In this project, I mount the electronics from my single-key USB keyboard project to the back of an industrial mushroom push button switch. The finished big red button now activates my screensaver with a single overly-large button press. The biggest issues in this […]

Resistive load, constant-current power supplies, and a 3D printed desk lamp

Dr. Scott M. Baker published a new build: In this video, I build a 3D Printed Desk lamp. The basic design came from Thingiverse, but I repurposed my LM2576 Constant-Current design to serve as a dimmer.  It all started when I found an interesting lamp on thingiverse, which used 75mm air hose segments from another […]

Raspberry Pi based indoor air quality monitor

Dr. Scott M. Baker made this Pi-based environmental monitor and wrote a post on his blog detailing its assembly: For years I’ve followed the “uRadMonitor”, a device that does air quality monitoring and radiation monitoring. I’ve played with geiger counter projects before and frankly found them to be not very interesting. However, the idea of monitoring […]