Go Down

Topic: Motors no longer working (Read 500 times) previous topic - next topic


I have 2 motors(1.5-3v) hooked up to 2 SN754410 motor drivers(1 motor on each SN754410). I attached both drivers on a breadboard and hooked them up so that they share the same power supply of 6v( 4 AA batteries) At first, they worked, but suddenly they stopped working. One motor does not work completely while the other motor only works for 1 or 2 seconds(supposed to work for 10 seconds). Is there something wrong with my power supply because my motors go really fast.And should I get some type of equipment like a voltmeter?


they share the same power supply of 6v( 4 AA batteries)

So have you checked the battery voltage? It could just be that you have drained them. Working for just a few seconds and then stopping sounds like it to me.

Nick Gammon

And should I get some type of equipment like a voltmeter?

A multimeter is very handy. Lets you check voltage, current and resistance, and thus continuity.

Drew Davis

Also can we please see your code.


Oh, thanks guys,the battery was just drained. Also, if I want to use 3 motors, should I keep the 6v power supply(because the motors go really fast...its freaking me out a bit.)?


That driver chip has darlington outputs so it will be reducing 6V down to 4 or so anyway, so 3V motors aren't going
to be massively overloaded (still its desirable not to overdrive motors, they get hotter and wear out faster).

Change those 4AA cells for 4 NiMH rechargeable AA's and that'll be about 5.2V instead of 6.0V, could help (with
the voltage and with the battery draining).
[ I won't respond to messages, use the forum please ]

Go Up

Quick Reply

With Quick-Reply you can write a post when viewing a topic without loading a new page. You can still use bulletin board code and smileys as you would in a normal post.

Warning: this topic has not been posted in for at least 120 days.
Unless you're sure you want to reply, please consider starting a new topic.

Note: this post will not display until it's been approved by a moderator.

shortcuts: alt+s submit/post or alt+p preview