This circuit was found in a 1970s General Electric documentation. This circuit already used an emitting LED. The circuit operates at frequencies from 50 Hz to 50 kHz with short pulses
This circuit was found in a Popular Electronics of the 1990s. The sensor is a rotating mechanical...
In the figure we have the way to trigger a 7555 CMOS monostable with a positive pulse. The time...
The circuit in the figure uses hall sensors to obtain the current measurement through the magnetic...