Looking For Gadget Inspiration?

Me too.

I have a huge collection of all things Arduino – LCDs, touchscreens, cases, batteries, ICs, sensors, knobs, switches, wires and everything in between. And I can’t come up with a single thing to build and USE.

I’m not an academic hacker so I like to make things I need, or at least things […]

Toobin’ Arcade Game

I recently restored a Toobin’ arcade coin-operated (coinop) video game. Operators have a habit of doing some of the most awful things to games, so I had to undo some damage and stupid modifications, like changing the marquee lighting BACK to florescent from incandescent (which seems to be a favorite modification of operators for some […]

Making Boards

Bad Assumption

When I first started the F18A project I figured getting a minimal FPGA board to run it on would be easy. After all, I bought my fully loaded devboard for about $150, and the only thing I needed was the FPGA and a few connectors.

Well, I’m here to tell you it did […]

Learn VHDL or Verilog?

The quick answer is, VHDL, then Verilog. Yes, both! There is a lot of existing HDL out there, examples, complete “cores”, etc. and the one you need, or want to look at to get ideas, might be written in the HDL that you decided not to learn.

I learned VHDL first, and I’m working on […]

FPGA Education, Books, and Community


I’m a self learner. If I want to know about something, I’ll generally start with a Google search and usually end in shopping trip to Amazon (with a wish list full of the books I can’t afford yet.) When I decided to start FPGA development, I purchased my devboard and found the 5-star […]

TIdBiT – TI BASIC Translator

Download: TidBit source

V3.0 – Updated on September 13, 2016

TidBit was created to help write TI-99/4A BASIC and Extended BASIC programs. TidBit is a pre-processor that lets you write your code in a more natural way (no line numbers, use indentation and comments, use labels, etc.) and then generates a normal BASIC/XB program that […]

Bank Switch Mini 256K

Bank Switch Mini 256K

When I started selling the Classic 64K Bank-Switch Boards on the CHC store, I wanted to follow Jon’s lead and offer a cartridge shell. Currently the only place to get a 99/4A cartridge shell is to removed the circuit board from an existing TI produced cartridge, at least until […]

A Wireless Motion Sensor Array – Part 4


Yea, I thought the hard part of making these sensors was over too. Boy was I wrong. Prototyping on a board I could plug in to the wall was pretty easy. Going from zero to a working transmitter/receiver took a few hours over a couple of days and that was mostly because I’m a […]

A Wireless Motion Sensor Array – Part 3

You might be thinking that the project is finished and that you should take what we have already, slap everything in a box and start using it. Indeed, you could, but we need to talk about the most important thing of all : POWER.

Until now I powered both the receiver and the transmitter via […]

A Wireless Motion Sensor Array – Part 2

In part 1 I got the RF links talking to each other. In this part I’m going to wire up the PIR sensor so the alarm only goes off when it is tripped.

Upload this sketch to your transmitter Arduino (very, very close to the initial sketch) :

The only thing I added was […]