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.
We can obtain the voltage multiplication using all six inverters of a 4049 integrated circuit, as...
Found in a 1970 documentation this circuit makes use of components still common in the market. The...
In the figure we have a source suggestion for the bench with several outputs that can be used...