The LED car voltmeter (1)

Published:2011/7/23 20:00:00 Author:qqtang | Keyword: car voltmeter | From:SeekIC

Here is to introduce the LED car voltmeter which is made of the LM3914 display drive integrated circuit and LED, the display voltage range is 10.5V-15v, it can be used vehicles of 12V battery.The working principle of the circuit The LED car voltmeter consists of the display drive integrated circuit IC, point/line display mode selection switch S, resistors R1-R5, potentiometers of RP1 and RP2, diodes VD1-VD5, capacitors of C1 and C2, LED VL1-VL10, see as figure 7-75.



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