With this circuit it is possible to connect a comparator to a power stage via two wires. The circuit can be used as a voltage monitor, for example.
This circuit can use a pendulum sensor. We found this configuration in a 1994 publication. The...
This circuit is from a 1964 Electronic Design. The sensor is an LDR and the transistors are...
This circuit works both as a preamplifier and activates a relay when speaking in front of the...