This shield circuit is from a 1968s Motorola documentation. The relay is according to the supply voltage. R1 can be reduced to lower trigger voltages.
This circuit, which in our times would be called a shield, can also be used with other loads. The...
This converter converts signals from the 50 MHz band to the AM band, making it possible to receive...
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...