We found this circuit in the March 1999 issue of Electronics Now magazine. The indicator used is an analog type. The values indicated depend on the calibration.
This high input impedance circuit makes use of two operational ones that are still common. The...
This circuit is suggested by Motorola and consists of a voltage reference based on an MC1403. The...
The output voltage is adjusted by the trimpot. The power transistor mist be mounted on a heatsink. The 3.9...