using cheap eBay kits, some cheap eBay RGB LEDs to make an LED oscilloscope (inspired by Ted Yapos - LED Oscilloscope Mk. II)
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blincotron.stlStandard Tesselated Geometry - 892.86 kB - 02/10/2017 at 12:00 |
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matrix.123dx123dx - 190.49 kB - 02/10/2017 at 12:00 |
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I should have tested it before, first the kit themself and then the forrest mims version. The matrix is all soldered up and the kits are soldered like I've interpreted it so far.
At this point I cant tell what I've captured there, I'm having my thumb on signal ground to produce some jitter.
Some thoughts
Yesterday I thought I could 3D print a little LED holder to solder up a 3mm LED 10x10 matrix, where with that I could kit bash a mono prototype together - well, that escalated quickly. Out came the "blincotron". Since the front side looked a bit offset and boring, I've also added windows for the colorful backside of the pcbs to show. There are 2 potentiometer wholes and one for a switch, to manipulate "vertical gain", "horizontal sweep" and "freee running vs. triggered sweep". Still missing is a whole for the input signal (of course....) and a good spot for the 4011.
My favorite time of a project cycle!
parts | price | amount | total |
100pcs common anode CA RGB LEDs | 3.41 EUR | 1 | 3.41 EUR |
CD4017 NE555 LED chaser board | 1.15 EUR | 1 | 1.15 EUR |
LM3915 "funny" diy kit board | 1.50 EUR | 3 | 4.50 EUR |
Total | 9.06 EUR |
Thanks to current political events that makes: 9.73 USD
With a little creative air wiring this will make a lovely solder Sunday :)
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not sure what you mean exactly, plan is to connect 3 "channels" of lm3914/3915 each to a color and make a 10x10 rgb led matrix. I might use some RC filters for a one voice 3 color version.
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RGB LEDs? Are you going to make dual (or triple) trace version?