Found in a 1966 Electronics World, this circuit applies to the protection of any analog instrument. The diodes can be of any general-purpose type.
This circuit triggers three incandescent light bulbs following the audio signal applied to its...
This circuit is from an American publication from 1973. We can implement it with the NF494 for the RF...
The presented circuit allows to control the valve of a tap. The positioning of the emitter and the...