The LED car voltmeter (2)

Posted on Feb 5, 2014

Here is to introduce the LED car voltmeter which is made of the op-amp LM312 and LED, it can display 6 gears of voltages, 10-15V, each gear is 1V. The working principle of the circuit The LED car voltmeter consists of the regulator circuit, Vref circuit, sampling voltage circuit and LED display drive circuit, see as figure 7-76. The regulator circui

The LED car voltmeter (2)
Click here to download the full size of the above Circuit.

t consists of the 3-terminal regulator circuit IC, potentiometer RP and resistor R4.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    74C164 8 bit shift register work as a heart for car LED light sequencer
    VGA to video converter
    power How can I switch a high current with a low-rated switch
    Add a thermometer to your digital multimeter
    8 function christmas lamp
    Some interesting Projects
    A Studio Preamplifier
    The Aurora Alarm
    Micro Function Generator
    Solent Radio Control Model Boat Club
    VFD Clock
    Machine magnechuck under current protection circuit diagram
    50W Tube-Valve SW transmitter