ICL7107 Voltmeter Circuits
Power supply is indispensable for voltmeter circuit ICL7107 most commonly used in the market for this job (LCD-LED display, A / D converters) has integrated with-5v and +5 +5 volt single source we have two circuits Our first half... Electronics Projects, ICL7107 Voltmeter Circuits "analog circuits projects, " Date 2014/06/21
Power supply is indispensable for voltmeter circuit ICL7107 most commonly used in the market for this job (LCD-LED display, A / D converters) has integrated with-5v and +5 +5 volt single source we have two circuits Our first half is working with the +5 volt supply only source of PCBs to be a bit bigger but the circuit makes it attractive. The second circuit portion of the printed circuit quite small display control section, but feed on a single PCB symmetrical + – voltage
Voltmeter-1 http://www.reber.si/dvm/index.htm
R1 = 180k R2 = 22k R3 = 12k* R4 = 1M R5 = 470k R6 = 560
C1 = 100pF C2, C6, C7 = 100nF C3 = 47nF C4 = 10nF C5 = 220nF
P1 = 20k multi-turn U1 = ICL 7107 LD1,2,3,4 = 4 adet 7 segment Display
R 3 should be changed according to the voltage to be measured
0-20 V ….R3 = 1.2K
0-200 V …R3 = 12K
0-2000 V ..R3 = 120K
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