So I bought a cheap motor driver from China off of EBay, and of course it doesn't come with any datasheets. I've looked up others with the same L298N chip, but this one confuses me. On others, the ENA and ENB pins consist of one pin each, and when a voltage is applied to the pin, Motor A or Motor B will enable. But on this design there are two pins each with a jumper across them. I'm confused on how I activate Motor A or B. Any tips?
Do you have a DMM ?
HINT: IF you could jumper ENA o ENB to "something" , what would be the most convenient " thing" to jumprr it to ?
When would you want to remove the jumprrs?
I have a feeling that those jumpers might just take those ENA and B pins to 5V so that the A and B motors are enabled without you having to worry about doing it. If so, either leave the jumper or take it off if (say) you want to PWM either motor through the ENx pin.
As raschemmel hints, a meter will help you "decode" the board. You may find the back pin of each jumpered pair is 5V and the frion frion? front! pin comes from the ENx pin of the 298.
You just gave away tge answer! . How is he supposed to learn with you doing all his thinking for him?
Who trained you?
OK, so jumpers close a circuit. So I'm thinking that the jumpers let the voltage through to activate each respective motor. Then I'm guessing when you want to disable a motor, you take the jumper off to cut out the circuit to that motor.
Yes but guessing's never really good in the long run.... You have a meter?
(It's not right to talk of voltage being let through, btw. Voltage is across, and current is what goes through. There is still voltage across an open jumper or switch, but no circuit and hence no current.)