PiDP-8 Simulator Project
When I was in 7th grade in 1975 we were fortunate to have a PDP-8/I (I think it was an I) with a half dozen teletypes, VT50 terminal, and a… Read more »
Category: Make
LED Slide Projector Retrofit Part 2: Fail
The basic problem is the COB LED I used is too large to focus well. I could solve it with various optical techniques. The first thing I tried was to… Read more »
LED Slide Projector Retrofit
I got an old slide projector last year to display some moving gears for a steampunk event downtown. It uses a 200 watt projector bulb and gets quite hot. Inspired… Read more »
Retro Transmitter Retrofit (Part 1)
Click here for Part 2 The idea is to take an old FM transmitter and replace it with modern electronics to make a usable every day TX for quadcopter use…. Read more »
Lithium Charging Curve
This is the first charge of the new battery pack using the cells from the Chevy Volt. Generally it charged perfectly except that it never reached the Vhi cutoff voltage… Read more »
Raspberry Pi Stepper Motor
In preparation for the pi class I wanted to get a motor running and found this excellent tutorial: http://www.raspberrypi-spy.co.uk/2012/07/stepper-motor-control-in-python/ It works great once I realized the motor has a 64:1… Read more »
About home.newts.org
home.newts.org is a tiny Raspberry Pi Linux computer. Currently it runs pyweather to connect my Davis Vantage Pro2 weather station to wunderground.com. It also runs my tf mud client in… Read more »
RFID @catdoor for Twitter, Phase 1
Simple concept, put an RFID chip on your cat and a reader by the door. Tweet whenever the cat uses the door.The reader is a APSX 15.56MHZ RW-210 reader. The RFID is… Read more »
Machining Mars Etek Backplate with Python
To get the slots and the screws just right I used a Sherline tabletop CNC milling machine to cut the screw slots and openings. Only a little rework and it… Read more »