Voltage Level Detector (CB22135E)

We found this circuit in an English documentation from the 80's. Transistors are general-purpose types.

bq7790x Battery Protectors ICs (COM059E)
August 2016 - It can be obtained from Mouser Electronics the battery protectors series bq7790x of...
PUT Ramp Generator (CB4251E)
We found this circuit in the ON Semiconductor Thyristor Manual although similar configuration can be found...
DC-AC converter (CB12410E)
Published in 1988 in Hands-On Electronics, this circuit converts the 12 V of a battery into 120 V...