Can not be connected to 12 volt battery voltage regulation. 1. Because lm317 is a linear voltage regulator chip, its input voltage should be higher than the output voltage to work normally, and the 12-volt battery voltage does not match the input voltage requirements of lm317. 2. Under normal circumstances, the input voltage of lm317 is at least about 2 volts higher than the output voltage to ensure that it can work stably, but because the voltage of the 12-volt battery is 12 volts, it cannot meet this requirement, so the lm317 cannot be regulated normally.
3. If you need to perform voltage regulation operation on a 12-volt battery, you need to choose other voltage regulator chips suitable for lower input voltages or use other voltage regulator circuits to achieve it.
Yes, but the current can easily burn 317.