This optically coupled circuit was found in the February 1968 Radio Electronics magazine. The circuit uses an LDR in modulation. Transistors are types of the time.
August 2016 - It can be obtained from Mouser Electronics the battery protectors series bq7790x of...
We found this circuit in the ON Semiconductor Thyristor Manual although similar configuration can be found...
Published in 1988 in Hands-On Electronics, this circuit converts the 12 V of a battery into 120 V...