This sample and hold circuit is from a 1969’s documentation. However, it can be built with modern equivalent components, including the matched pair of transistors.
Suggested by Radio Electronics from the 90s, this circuit is suitable for NiCAd batteries with a...
The configuration already explored in our Circuit Bench section is from the National...
This is a very simple motor drive circuit with an LDR. The circuit simply powers a small motor. We...