We tried to build this circuit to start learning how the LM339 Quad Comparator works. Two circuits below are: First, is a 9V low voltage battery alarm circuit. I am looking forwarding to hearing from you. It can sense a drop in voltage of 2 or so millivolts, for example when the voltage drops from 12.400V to 12.398V. 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." 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. "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? The circuit stage comprising T1, T2, and P1 are configured into a simple low battery sensor, indicator circuit. My question is, if the Solar Charger is connected with the Solar Panel and the Load is switched to the Battery (e.g. Solar Panel 9V, 1amp Relay 6V/200mA Rx 10 ohm/2 watt zener diode 7.5V, 1/2 watt. However when the Lipo voltage drops below 3.1V the power coming from the Battery has to be stopped immediately. 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. Using the component values shown, the circuit will switch LED1 from being continuously on to flash mode when the 9V battery drops to about 6.5V. It can sense a drop in voltage of 2 or so millivolts, for example when the voltage drops from 12.400V to 12.398V.
0 kommentar(er)
