This circuit was suggested by Texas Instruments in a 1980s documentation. The transistor must be equipped with a heat sink. The transformer has 10 A secondary current.
The circuit shown in the figure allows a load to be switched on and off (through a relay) at...
We found this simple frequency meter for low frequencies in an English publication from 1978. The...
This circuit has a full scale of 1 kW, being indicated for the 110 V power grid. Adaptations can...