Found in Popular Electronics from the 90s, this circuit detects modulated infrared radiation and serves as a test for remote controls. Infrared sensors equivalent to the one indicated can be used.
This voltage regulator was obtained in the SGS manual of linear integrated circuits of 1982. The...
Using a DAC038 IC this circuit is from Radio Electronics from May 1983. The circuit must be...
This circuit turns off after a time given by capacitor C1. This component can have from 1 to 1,000...