@pattang2018, Sorry but your circuit will not work. You are trying to compare two voltages, both of which are derived by potential dividers from the same charger output voltage. One of the two voltages into the comparator must be a fixed reference voltage against which to compare the varying voltage out of the potential divider. The reference must be sufficiently lower than the input voltage so that it is stable over the range over which you expect your circuit to work. You could use a zener diode or a more accurate reference device to give you an accurate voltage for example, 5.6V from a zener or 2.5V from a reference chip You also have not connected up the comparator correctly. You have left one input to the seond comparator floating. You cannot drive the input to the second comparator (which you do not need to use anyway) from an open collector output from the first one without a pullup resistor. You must not leave unused inputs floating. Why not just sort out the polarity of the inputs to the first comparator and connect the LED and series resitor to that output and then just tie both inputs of the other comparator to ground? You also must have at least 100nF decoupling capacitance across the comparator supply pins and another at least 10uF bulk capacitance across the input supply. This might help: [https://easyeda\.com/andyfierman/Welcome\_to\_EasyEDA\-31e1288f882e49e582699b8eb7fe9b1f](https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f) and: [https://easyeda\.com/andyfierman/Power\_supply\_decoupling\_and\_why\_it\_matters\_\-451e18a0d36b4f208394b2a2ff7642c9](https://easyeda.com/andyfierman/Power_supply_decoupling_and_why_it_matters_-451e18a0d36b4f208394b2a2ff7642c9)

thanks for input. Just found a 5v zener in my parts box so will use that to fix reference voltage, diagram above was intial draw when learing the software and will update it from desktop draught. Im testing live on breadboard so do have some of the caps mentioned on supply rail but didnt tie down open pins. I will do as you mentioned, i understand better now you explained it I will try update the diagams correctly when finshed testing on beadboard. ty sir.