LEAP#340 Boldport Club IxpandO
IxpandO is an input/output expansion board based on Microchip’s MCP23017, BoldportClub Project #16. The board design leaves the door open for various configurations. I decided to go initially with the default setup of 8 inputs (switches) and 8 outputs (LEDs), with an Arduino sketch to demonstrate digital output and interrupt-driven input. As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#339 PT2399 Delay Kit
I have been reading up on the PT2399 echo audio processor, and a good way of seeing one action is to pick up one of the many delay effects pedals.
The kit I found is nicely put together with a pre-drilled and decorated 1590B enclosure, and some very nice knobs and smooth pots. The build was a breeze, and results are actually pretty decent. As always, all notes and schematics are in the Little Electronics & Arduino Projects repo on GitHub.
Here’s a quick hit to demo the effect, with a clean guitar signal and all the effect settings on “11” (mix, repeat, delay)…
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LEAP#338 Going GlowBall!
The Glass Eye Studio “Celestial Super Nova” is quite an awesome piece of glass work … I have no idea how these can be manufactured in any quantity with consistency! Perhaps I should find a class? Glass work seems all the rage these days!
You can buy a base with lighting effects, but where is the fun in that? Here’s a project to make a base for the glass ball. Because it is going to sit on a desk, I decided to combine two functions:
- a multi-colour “glow” effect to light the ball
- or switch to power a 3528 LED strip (1m, 60 LEDs, 12V, cold white)
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
Here’s is a video with a few soothing minutes of the glow effect;-) …
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LEAP#337 RGB LED Glow with Opamps
For a while I’ve been thinking of ways to generate a pseudo-random rainbow glow on a composite RBG LED.
In particular, while avoiding just throwing a microprocessor at the problem!
I finally settled on three independent opamp-based triangle wave generators that have a nice drifting phase offset.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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