This is the first in my series of Z80 retrocomputing blog posts. It serves as an introduction. I started by building the RC2014, a popular retrocomputer platform that I found on Tindie.
Read MoreCategory: Electronics Projects
Building the Dutchtronix Scope Clock
I was browsing the forums one day at EEVBLOG (where they like to talk about oscilloscopes and DMMs all day long, every day) and I saw mention of the Dutchtronix scope clock. Deep down I knew it and scope clocks like it existed, but I’d never taken the time to order one, until now. So …
Read MoreProduct Reviews: Mooshimeter, Raspberry Pi Black Slices Case, Powerhorse Surface Cleaner
Here are a trio of product reviews. The first is the Mooshimeter: Mooshimeter is a DMM accessory for use with your iPhone, iPad, or Android device. It communicates over bluetooth to the device. It supports multiple channels so you can measure both current and voltage simultaneously (very handy!). I needed a secondary DMM for the …
Read MoreMagic Eye Tube Audio Spectrum Analyzer
In this post, I put together a magic eye tube spectrum analyzer using my two-tube boards, op-amp boards, and a spectrum analyzer board that uses the BA3830S chip.
Read MoreMagic Eye Tube PC Monitor
I thought it would be cool to use magic eye tubes to visualize the activity on my PC, so I threw together a two-tube project that shows CPU utilization and network utilization.
Read MoreMagic Eye Tube interfacing with a Raspberry Pi
I discovered magic eye tubes on eBay. I bought a couple of cheap and simple boards and assembled them. Then I tried to see what it would take to control the tubes from a Raspberry Pi.
Read MoreDIY Nixie Tube Frequency Counter
I’ve always wanted a Nixie Tube Frequency Counter, but one has never come up on eBay for a price that I was willing to pay. So I just made my own using the same Nixie Tube boards as the calculator project. I learned a bit about frequency counter front-ends in the process.
Read MoreRaspberry Pi Switching Power Supply Shield
There are many times when I want to power one of my Raspberry Pi projects from 12V instead of 5V. I built this switching power supply shield to make it easy to do so.
Read More