Digital Dc Voltmeter Circuit Diagram. I connected up as per your diagram. The circuit as it is described here can display any dc voltage in the range of 0 1999 volts.
In my situation the power supply and the load to be read are one and the same ie the 2 rails of. A transistor is a current controlled device so resistance is inserted in series with the transistor q 1 to select the voltage range. Working of this digital voltmeter circuit is very simple.
To get an effective voltmeter meter range in excess of 1 2 volt we ll need to design a circuit allowing only a precise proportion of measured voltage to drop across the meter movement.
Led digital voltmeter circuit diagram with ic7107 the voltage intended to measure is fed to the circuit through resistors and capacitors as shown in the figure. Then enter to the ac to dc converter circuit by ic1 and accessories in figure 3. The same principle applies to the dc voltmeter. Thank you for posting the wiring diagram.
