Digital Voltmeter

[guclusat]

Components

• R1 = 180k
• R2 = 22k
• R3 = 12k (see note)
• R4 = 1M
• R5 = 470k
• R6 = 560
• C1 = 100pF
• C2 = 100nF
• C3 = 47nF
• C4 = 10nF
• C5 = 220nF
• P1 = 20k Trimpot
• U1 = ICL 7107
• LD1,2,3,4 = 7 segment Display comon An

Note- R3 ( voltmeter scale)

• 0-20 V ….R3 = 1.2K
• 0-200 V …R3 = 12K
• 0-2000 V ..R3 = 120K

Voltmeter PCB