LEAP#261 MCP4017 Digital Pot
I’m having a minor obsession with digital potentiometers!
The next I’ve tested is the MCP4017T-104E/LT (100kΩ rheostat version).
It comes in a very small SC70 package and works as advertised.
Although conveniently controlled with I²C, there doesn’t appear to be any way of setting the address.
That and the fact that it is only rated for 2.5mA make it a bit limited in scope of application.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#260 Saleae Logic
I recently had a Saleae Logic fall into my hands - an old model looking for a good home.
As a 24 MS/s 8 channel logic analyzer, not the greatest specs these days but quite adequate for my needs.
I was pretty impressed - up and running in 30 seconds, and using a Mac too!
Saleae have done a brilliant job of creating an excellent experience, and continuing to support their discontinued products.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#259 M62429 Digital Pot
I’m trying out some digital potentiometers for an application.
The M62429 is a dual channel electronic volume control so actually works on a log scale, but can be used for non-audio applicaitons.
The programming interface is a very simple two-wire (data, clock) serial protocol.
But being so simple (and having a strange command length of 11 bits) it’s not really possible to use either
the standard Wire or SPI libraries. Time for some bit-banging!
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#258 Another Clap Switch and Excuse to Solder Boldport-style
I’ve had this clap-switch (voice activated) kit sculling around for a while .. another “stocking stuffer” bargain from aliexpress.
The circuit is very similar to a previous clap-switch project, and nothing drastically interesting.
So I pulled this kit out primarily to practice some Saar Drimer/Boldport-style soldering.
The objective is simply beautiful solder domes;-) I do some comparisons, and come to the realisation that
the solder stock is perhaps the most important factor.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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