This circuit was found in a 1991 publication. The transistor can be a general-purpose type.
The accuracy of this multimeter depends on the accuracy of the used resistors. The circuit uses a...
The output voltage depends on the zener diode. Zener in the range between 1.2 to 12 V rated to 1 W...
This circuit produces low power flashes in a LED. Frequency is adjusted by P1 and depends also on...