Problem With my H Bridge IC

[Mdoy Isaac]

Hey, I'm doing a Skills Canada robotics competition with my school, and we need to remote-control motors to drive the robot. we are using a arduino microcontroller, so we got one of these:

**broken link removed**

(datasheet).

Its a h bridge 5205-2 IC. we set it up on a breadboard, but when we run power through it the motor only makes a clicking sound and doesnt go. we are using a cordelss drill motor.
We've control-tested all the variables: the motor runs when connected directly to the battery, and we tested the voltage coming out of the h bridge outputs and it shows the same as the voltage of the battery. same with the amperage.
Are we missing a resistor? what is wrong with our circuit?

Thanks,

 

[alec_t]

Welcome to the forum. New members can't post attachments immediately; they have to await moderator approval.

Are we missing a resistor? what is wrong with our circuit?

We can't see your circuit, so we can't tell.

 

[audioguru]

I think the motor draws more current than the maximum allowed current of the IC. So the IC shuts off.

Hey! You can't use a lousy breadboard for 6A of current.

 

[Mdoy Isaac]

i'll do a circuit drawing to show what we have.

 

[audioguru]

I think the very high current drawn by your motor has melted your stupid breadboard.
Post a video of the smoke.

 

[Ubergeek63]

I think the very high current drawn by your motor has melted your stupid breadboard.
Post a video of the smoke.

So Guru, still as outspoken as ever I see!

 

[audioguru]

So Guru, still as outspoken as ever I see!

I replied to a little school kid who knows nothing about electronics.
He says, "we" so it is a bunch of little wee school kids.

 

[Ubergeek63]

I replied to a little school kid who knows nothing about electronics.
He says, "we" so it is a bunch of little wee school kids.

Maybe he is a prince and that is the royal "we" LOL

that is actually a reasonable part for a beginner to use. I would recommend to him to PWM it to limit the stalled rotor start up current. then he would have a chance of getting it going.

Dan

 

[languer]

Have you checked the Error Flag output? You need to pull it up with something like a 10k. But it should indicate if the IC detected one of the fault conditions listed on section 1.8.