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These posts are mostly tutorials, records of experiments, repairs, etc., that aren’t really projects but were interesting enough to write up.
Testing Servos with a Function Generator
Very quick post about testing servos without a servo tester, mostly for my own reference but here you go.
September 23, 2026
GALs by Example, Part 3
In part two we learned how to use tri-state outputs to control access to and from a shared data bus. In this post we will learn how to implement sequential logic by using the GAL16V8 in registered mode.
September 19, 2026
GALs by Example, Part 2
In part one we learned about using the GAL16V8 in simple mode, which allows only pure combinational logic. In this post we will learn how to use tri-state logic in complex mode.
September 18, 2026
GALs by Example, Part 1
GALs are simple programmable logic devices, (SPLDs) which are old technology but are still available and they remain popular among hobbysist as way to reduce the number of logic ICs in a project. Let’s learn how to use them!
September 15, 2026
I Fixed the Air Conditioner
The AC went out last night and it was 82° inside this morning. All the HVAC contractors are super busy in Texas in the summer, and the best we could get was an appointment in three days. Not good enough. So I decided to give it a look myself.
September 13, 2026
Testing GALs with Minipro
I have used GALs a lot and always ended up testing them on breadboards with jumper wires, which doesn’t inspire a lot of confidence. But I recently discovered that I can write comprehensive test suites and run them with minipro . Here’s how it works.
September 10, 2026