Found in a 1990s Motorola documentation, this circuit aims to protect a triac that drives an inductive load using a relay-switched snubber.
We found this heart rate sensor circuit in a Popular Electronics from the 90s. The placement of...
Although the output voltage obtained is high, the current is very low, given the power of the...
This two competitor version of the game is shown below and uses lamps as indicators. You can...