Car Battery Monitor using LM3914

pieman54 said:

Hi there....Just wanting to know if the circuit below can be modified to read/display the voltages in reverse order. ie. at one end of the scale led_1 turns on at 11.6 to 12V and led_10 turns on at8 to 8.4V????? Is it possible to reverse the output to do this. How would I do that????
https://www.electronics-lab.com/projects/automotive/009/index.html

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IanP said:

Here is one crazy idea:

try to connect R(LO) to V(Ref-out) and R(HI) through 1kΩ to 0V
and see how it goes ..

Rgds,
IanP

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pranam77 said:

pieman54 said:

Hi there....Just wanting to know if the circuit below can be modified to read/display the voltages in reverse order. ie. at one end of the scale led_1 turns on at 11.6 to 12V and led_10 turns on at8 to 8.4V????? Is it possible to reverse the output to do this. How would I do that????
https://www.electronics-lab.com/projects/automotive/009/index.html

Click to expand...

Put the LM3914 in bargraph mode, Connect all the outputs of the LM3914 to a Hex Inverter gate like CD4069 and then connect LED's to its outputs which will glow the last LED when the top voltage is connected and the Bargraph will move left side as to indicate full scale for the lowest volatge set by the circuit. Cheers

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pranam77 said:

Here is your application schematic. Hope it helps you. Cheers

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