The output voltage of this circuit is approximately four times the supply voltage. The circuit is from an Electronics Now April 1995. The output current is very low.
This metal detector circuit uses an AM radio as an indicator. The radio is placed off-station and tuned...
This circuit trips when the input voltage exceeds 30 V. Its base is a DIAC and it can be used to...
This simple measuring bridge allows the capacitance m of some pF to microfarads to be measured...