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.
We found this shield circuit in a 1991 technical documentation. The phototransistor can be...
January 2017 - Texas Instruments is making available through Mouser Electronics the new Buck...
The figure shows how to obtain a locking relay for an alarm circuit with sensors in series and in...