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Digital Voltmeter

Circuit use intersil ICL7107, R3 value change scale, P1 adjust voltmeter

Digital volmeter with ILC7107

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

volmeter pcb