![]() ![]() Next we have set up a voltage divider made up of R7 and R9 to. We have now fixed the reference voltage for the Opamp’s U1:A to U1:D for 100 to 25 charge indication. Repeating the above procedure gives 3.9V for 50 to U1:C and 3.6V for 25 to U1:D. I am looking forwarding to hearing from you. 4.2V is the reference voltage to the Opamp U1:B which is for 75 of battery charge indication. ![]() If it does lit, then, does the Solar charger stop further Battery drain automatically or should a relay be used instead? In case it does not lit with the Solar Charger connected, then I have to consider to use a Voltage sensor with a relay. In my case the Solar Panel will be always connected to the Solar Charger. So, if you don't have USB/Solar wired up, when the battery voltage drops below 3.1V, the orange LED will come on." If the battery is still lasting 3-4 months, that would mean a really minor short, if that were the case. Another possibility is that something has caused your input jack to stop completely opening the circuit when the plug is pulled out. When this LED is lit, the charger is working to charge up a battery! It also acts as a low battery indicator (fixed at 3.1V) when no power is connected. Re: (Godin A8) Pickup battery runs out very quickly. "The orange CHRG LED indicates current charging status. I am asking this because according to your documentation. during night) is the CHRG Led lit when Battery level drops below 3.1V? My question is, if the Solar Charger is connected with the Solar Panel and the Load is switched to the Battery (e.g. The 2 resistors are used as a potential divider. This way the intensity of the indicator LED does not change with change in the battery voltage you want to check. This circuit diagram is designed to help you monitor the voltage of your 9v battery, so you know exactly how much battery power is remaining. This smoke alarm uses a 9V carbon zinc battery (alkaline and lithium. However when the Lipo voltage drops below 3.1V the power coming from the Battery has to be stopped immediately. One is a constant 5V to power the two LEDs and the other input is the battery whose voltage you want to check. It also has a programmable low battery indicator and a voice warning system. According to your documentation when the voltage level of the Solar Panel drops below the Battery level then the Load comes from the Battery. I am planning to use a Solar Charger connected to a Huge Solar Panel and a Lipo Battery.
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