LEAP#385 BoldportClub Widlar Blinky
The µA723 voltage regulator is a classic from 1967, and was celebrated in the Boldport Club “Widlar” (Project #21). It is a bit boring to just regulate voltage, but since the µA723 contains an error amplifier and voltage reference … yes, it is possible to make an oscillator instead. My version of the Widlar glows an orange LED…
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#379 AS3935 Lightning Sensor
I first heard about the AMS AS3935 Franklin Lightning Sensor in Arduino for Ham Radio. They are available as modules with built-in tuned antenna, but are relatively expensive/rare. I finally got my hands on one to experiment with.
Since we have between 171 and 186 lightning days on average a year here in Singapore, with each square kilometer being struck up to 16 times annually, I’m expecting to have some fun with this.
Here’s a first step - exploring the programming of the module with the standard Wire library. So far so good!
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#378 BJT Phase Splitter
Simple unity-gain phase splitter in a little breadboard-compatible package. It uses a common-emmiter amplifier with a gain of -1.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#377 DIY Nokia 5110 Shield
Wiring it up a Nokia 5110 display every time I want a little LCD output is getting a bit tiresome. I have a spare prototyping shield, so A + B = a handy thing to have lying around for the next time.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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