Obtained from a 1969 documentation, this circuit can operate at frequencies up to 500 Hz, counting up to 999. The circuit makes use of neon lamps of the time.
This receiver can be used to receive signals from the previous circuit transmitter. The circuit is...
September 2016 - It can be purchased from Mouser Electronics the new antenna tuning circuit from...
In the figure we have an infrared receiver circuit using an operational 741. The circuit is an...