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.
The idea of this automation can be extended to other applications that involve the control of...
This sophisticated transmitter was found in the June 1993 issue of Electronics Now magazine. The...
March 2017 - Texas Instruments LM5166 Synchronized Buck Converters are available at Mouser for 3V...