Two sensors are used in this simple remote-control circuit, one to switch on and one to switch off the relay. The circuit is from 1986 documentation. The transformer has 12 V of secondary.
Found in Maxim documentation from the 90s, this circuit makes use of components from the period. The...
Found in an English Maplin magazine in 1983, this circuit has an RIAA equalization. We suggest its...
In the figure we have a way of obtaining a 13,2 V with current up to 5 A using an integrated 7812...