We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a frequency range determined by C1 and R3. The signal generated is square.
Published in a PE Hobbyst Handbook of 1991, this sensor uses an integrated circuit that is unusual...
This circuit was obtained in a Motorola manual from the 70s. The integrated circuit is from that...
In critical applications of the RS-232 interface, the danger of induced voltages in the cables must...