Programming a 7-segment Display, using just Arduino digital pins (the hard way)
The purpose of this project is to build a countdown timer comprised of two 7-segment displays. Several interesting challenges are solved or resolved: How to interface »
The Magic Platform - DIY assisted crawling device for child with developmental disabilities
This post is different from anything we’ve published before. It’s an explanation of how we created one of our most ambitious projects to date »
Install the Arduino IDE (with ESP8266 support) on a Raspberry Pi
A couple of weeks ago I set up a new bench in my workshop. It was a great new space, but each time I wanted to »
Quick and Easy Hack of the ESP8266-01 USB Adapter
We all know how fidgety it is to flash the ESP: 3.3 volts only, smoothing capacitors, GND-GPIO 0, VCC to CH_PD. Wouldn't it be »
How to Protect a Rasperry Pi from a Powered USB Hub
As most readers of this blog probably know, there's a limit to how much current you can pass through a Raspberry Pi. When used with a »
Geekcon 2016 - Scorbot Learns to Draw
About two years ago I got Scorbot from a junk yard. One of the first posts I wrote was dealing with Scorbot first moves. At first »
Pinning down an unlabelled 8 x 8 LED Matrix
A couple of months ago, during a visit to foreign shores, I picked up an 8x8 LED matrix. What caught my eye was that it was »
Screen died on me... It's time to use my stock of broken laptops for a good use
Lately my monitor stopped working. It was during the weekend and there was no way to get a new monitor anywhere. I was working on some »
Your cable may be cutting your power supply's output by more than half. Here's why.
One of the first posts to appear on this blog was Amir's very informative description of the workings of the cell phone power supply (charger). In »
Early Evening Hacking - Upgrading my WiFi Reception
Have you ever had that problem where your WiFi reception is not good enough? How about doing something about it? Last year I moved to a »