[Augusto] wrote in to tell us about his keychain-sized persistence of vision project. He built the original prototype on some protoboard, using a PIC 16F627 to drive eight LEDs. Synchronization is ...

One of [NE555]’s boards from the 90s. Over on twitter [NE555] has been posting beautiful SMD prototypes. Back in the 90s when surface mount components gained widespread adoption, the quick and cheap ...

I got a hold of a 1.27mm pitch Arduino prototyping shield kit and had an idea for a project using it: a small LiPo battery charger. I ordered up my BOM from Digi-Key and waited for that to come in.

Here is a simple capacitive touch switch circuit for electronics hobbyists. Even though the circuit uses smd components, construction of the touch sensor switch is not very hard because the whole ...