This simple indicator circuit was found in a documentation from the 90s. Trimpots can have values between 2k and 10k, a series resistor is recommended to limit the current to the minimum setting.
This circuit converts a resistance in the range between 1 k ohm and 1 MΩ to a signal in a...
We found this circuit in an old American documentation. The circuit is simple by making use of an...
We found this circuit for 330 MHz using PIC in the magazine Electronics Now of December 1994. The...