hi guys,
i got one of those Bird-style electric scooters and i want to replace the battery pack of 29.4V with a bigger pack of 37.8V.
my problem is that the scooter's motor control unit has a uController, which runs off of a ST L78M05 regulator. i looked up the regulator and it turns out that it can regulate from an input of no more than 35v. if i give it an input of 37.8v it's bound to fail before long.
so what if i get a 30 volt zener and solder the anode of the zener to the input pin of the regulator, the cathode of the zener to a resistor, and then connect the other end of the resistor to ground?
i'm estimating the load on the 7805 regulator at no more than about 50mA.
i got one of those Bird-style electric scooters and i want to replace the battery pack of 29.4V with a bigger pack of 37.8V.
my problem is that the scooter's motor control unit has a uController, which runs off of a ST L78M05 regulator. i looked up the regulator and it turns out that it can regulate from an input of no more than 35v. if i give it an input of 37.8v it's bound to fail before long.
so what if i get a 30 volt zener and solder the anode of the zener to the input pin of the regulator, the cathode of the zener to a resistor, and then connect the other end of the resistor to ground?
i'm estimating the load on the 7805 regulator at no more than about 50mA.