Hi.In my project I use l298n motor driver ic and the supply to the driver ic is given using 2 rechargeable 3.7v 1200 mah li-ion batteries in series by removing the jumper on the regulator. It was working fine.But then I connected the jumper on the regulator to run the motor with 5v while still connecting the supply from the rechargeable batteries. The led stopped glowing. To my knowledge if the supply is greater than 12v leaving the jumper on the regulator will damage the regulator IC.But my supply is only 9v. Can u please help me know what damaged the driver ic ?
Without seeing exactly how it is / was wired, it sounds like you may have pushed voltage backwards - into the chip.
Please provide a well annotated schematic of what you did, then we may be able to help more.
Sadly,I don’t know the specific jumpers (they’re not labelled), but if you’re doing EVERYTHING by the example, you need to keep your mind. open.
Your picture does not show how Arduino is connected. Which Arduino?
L298n needs 5V low current supply and a second power supply to drive the motor.
5V may come from external (connectors on the left) or may be produced from the power source that drives the motor via the on board regulator. The jumper should be used if no 5V source is used. In that case the motor power source should be higher than 7V or so to get a reliable 5V from the regulator.
Above 25V or so the regulator might be damaged (look in specs).
Closing the jumper will not allow the motor to run from the source connected on the left. So if you think it will, you are wrong.
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