How to create a simple LED Matrix using PNP transistors and a ULN2803A integrated circuit.
Buying cheap electronics at Ebay: Part 1
Introduction The objective of this series of posts is to list some electronic components and devices useful for makers and hobbyists that can be bought by very low prices at eBay. Many times, we can find those devices at a much lower price than in many specialized stores, making them affordable to more people. In this particular …
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