This circuit was found in Motorola's 1967 documentation. The circuit makes use of power transistors of the time. For pulse pickup an appropriate pickup coil is used.
Mouser Electronics is now shipping DA14585, a kit for the development of voice remote control...
The presented circuit causes an LED to flash with voltages of 85 to 200 V continuous and has a low...
This circuit for analog video signals was found in a March 1988 Radio Electronics. The Maxim...