Hi!
I have made this simple circuit to power a DC motor following the datasheet of LM317 and i have an issue. When i switch on S2 with the Vo set higher than 8V the motor goes on and off continously and fails to start correctly. At the same time the LED blinks.
If i switch on S2 with a Vo lower than 8V then the motor starts just fine. Then i can increase Vo to maximum an the motor still works. I always swtch it on with no load on the motor.
One more thing to mention is that the LDO and D1 get pretty hot.
What am i doing wrong and how can i improve this circuit to be able to start the motor correctly at any Vo i set?
I have made this simple circuit to power a DC motor following the datasheet of LM317 and i have an issue. When i switch on S2 with the Vo set higher than 8V the motor goes on and off continously and fails to start correctly. At the same time the LED blinks.
If i switch on S2 with a Vo lower than 8V then the motor starts just fine. Then i can increase Vo to maximum an the motor still works. I always swtch it on with no load on the motor.
One more thing to mention is that the LDO and D1 get pretty hot.
What am i doing wrong and how can i improve this circuit to be able to start the motor correctly at any Vo i set?