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This is a fun little board. You’ll need a minimum of three connections to make it work. I’ve tested it at 3.3VDC and 5VDC with success. Apply the +V to the VCC pin, ground the D0 thru D7 pin of the LED you wish to light, and ground the color pin (R)ed, (B)lue, (G)reen to choose the color. You can light all eight LEDs by grounding all Dx pins and choose all three colors by grounding all three color pins. The only error I’ve found with the board is the markings for the color pins for (B)lue and (G)reen are reversed. Perhaps this is why they were sold as surplus?
| 10 + | $0.25 each |
| 100 + | $0.20 each |
| 20 + | $1.50 each |
| 100 + | $1.15 each |
| 10 + | $2.30 each |
| 100 + | $2.07 each |
