Found in a Motorola's 1968 documentation, this circuit operates at 16.5 kHz. The output is 5 A. The transistors are from the era, admitting modern equivalents.
We found this circuit in an old documentation. The operational amplifier of the time can be...
This Texas Instruments integrated circuit, available from Mouser Electronics, has a 91 dB common...
This “people detector” with pyroelectric sensor was found in the April 1991 issue of Radio...