24v Battery Level Indicator Circuit Diagram. How to make a 24 volt battery level indicator circuit battery volt level indicator today i will show you how to make a 24 volts battery charging level indic. The shown battery indicator circuit is configured in the dot mode meaning only one led glows at any instant indicating the relevant voltage level.
This resistor controls the brightness of led s. If you want to make it respond in a bar graph mode simply disconnect the cathodes of all the leds from the existing points and connected them all with the ground or the negative line. This mode is selected by the external switch sw1 which is connected to 9 th pin of ic.
Tied to this is a string of divider resistors r2 6 that set the various fixed voltage levels.
U1 is an lm339 quad comparator that compares the various voltages from the two dividers. The shown battery indicator circuit is configured in the dot mode meaning only one led glows at any instant indicating the relevant voltage level. This mode is selected by the external switch sw1 which is connected to 9 th pin of ic. If you want to make it respond in a bar graph mode simply disconnect the cathodes of all the leds from the existing points and connected them all with the ground or the negative line.
