This very complex circuit in terms of the number of transistors was found in Radio Electronics from March 1966. The circuit is for low impedance headphones. The transistors are from the time.
Found in an old Popular Electronics, the purpose of this circuit is to give a strong discharge in an...
The circuit shown is from the 1993 Motorola Linear Interface ICs. The power source may be common...
Indicated by a Popular Electronics of the 90s originally to measure the light determining the exposure...