This circuit acts on a relay disconnecting the load when the input voltage exceeds the set limit. The transformer is 12 V secondary according to the relay used.
This circuit that generates a special sound was found in a Popular Electronics from the 90s. The...
This bridge amplifier (BTL) is from the SGS linear integrated circuit manual. The circuit is...
In the figure we have a simple way to produce tone in a piezoelectric transducer. The frequency depends...