This circuit uses a quadruple operational amplifier of the time. The circuit is from the 70s but can be implemented with modern operators that require the use of a symmetrical source.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
Found in a Popular Electronics from the 9s, this circuit has output for RS-232 interfaces and current...
Photodiodes can be used to sense moving objects, such as optical switches and encoders. In the...