Hi! I'm new to forum and electronic.
I've searched and unfortunately, I couldn't find a problem excatelly like me. Briefly, I connected UNO, Keypad, LCD 1602 (with connection shield), L298N driver and a small minebua stepping motor. At early tests (just a few second) all thing was good but when i assembled them, use a good 12V 1.5 A wall adaptor and connect 5V of the driver to VIN of UNO, No! the motor works and suddenly doesn't and suddenly do. The heat sink is hot! Four scenarios:
The 12 V (all jumpers leave in place) is high! (Rejected by me)
Iinternal short break of the L298N. (How can i check it?)
Incorrect driver! (See the later passage)
Need fan . (Rejected by me)
I've read some where that this old IC isn't efficient, the output current is just 500 mA not 1-2 A. I read a MOSEFT can work without heat sink up to 1.5 A.
What is the problem? If i must change the driver, Which is good for me? (cheap, easy to run and steady for long time works). Please guide me.
What are the voltage and current requirements for this motor. Can you provide a datasheet link?
UNO VIN pin needs at least 7V (up to 12) to get 5V from regulator, if your 5V supply is regulated and stable, connect to 5V pin.
outsider:
What are the voltage and current requirements for this motor. Can you provide a datasheet link?
UNO VIN pin needs at least 7V (up to 12) to get 5V from regulator, if your 5V supply is regulated and stable, connect to 5V pin.Heat sink on what?
Do you have an ohmmeter to measure the winding resistance? That would help ID the motor you have, also, all those motors look like low impedance types, so L298 is not suitable, you need a chopper drive with adjustable current limit.
shimidan:
I got a problem like a4988 stepper..., with my new a4988.
I'm not going to read 3 pages of posts to see what you are talking about. Please just describe exactly what you did (with wiring diagrams) and tell us what your current problem is.
The Pololu a4988 web page has great information about using the A4988.