DVM – Digital Led Volt Meter



Parts:
R1 = 8K2
R2 = 47K / 470K
R3 = 100K
R4 = 2K
R5, R6 = 47K
R7 = 0R / 4K7
R8 = 560R
C1,C5, C6, C8, C9 = 100n
C2 = 470n / 47n
C3 = 220n
C4 = 100p
C7 = 10-22u
D1, D2 = 1N4148
IC1 = ICL7107
IC2 = NE555
OPTO = CA 10 pin

Source: Reber electronic

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