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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LEAP#336 Comparator-based Relaxation Oscillator
A quick test of a classic comparator-based relaxation oscillator, modified for single-supply LM358 OpAmp.
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#335 MCP2200 LED Chaser (just because)
The MCP2200 USB-UART transceiver has 8 GPIO pins. Yes, you read that correctly.
With such unexpected I/O capabilities, I feel obliged to do the only responsible thing: blink LEDs.
Seven LED outputs and one input for a push-button to control direction of the “chase” sequence.
As simple C program using the hidapi and we’re done!
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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LEAP#334 Exercising the MCP2200 USB-UART transceiver
The MCP2200 is a USB-to-UART serial converter device.
It is getting a bit on the old side, only supporting USB 2.0, and all the software support provided is Windows-only.
Nevertheless, I got hold of the MCP2200 Breakout Module to find out more.
I was particularly intersted to see how far I could get under MacOSX, including configuration over the HID Interface.
The answer is pleasantly: all the way!
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
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