Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: cooldog on October 21, 2007, 04:26:12 PM

Title: speed controler
Post by: cooldog on October 21, 2007, 04:26:12 PM

i am looking to get a speed controler that runs 2 or 4 5 volt gear boxes from
http://www.pololu.com/products/solbot/0187/
but a also want a differential drive any ideas

Title: Re: speed controler
Post by: Steve Joblin on October 21, 2007, 04:56:41 PM

Not quite sure what you are asking for... Pololu makes great inexpensive motor controllers that would work perfect with GM8's... check out http://www.pololu.com/products/pololu/0410/

Title: Re: speed controler
Post by: cooldog on October 21, 2007, 04:59:43 PM

does that give me indiferential drive as well as forward and backwards on two dc motors?

Title: Re: speed controler
Post by: cooldog on October 21, 2007, 05:47:46 PM

can i have forward, backwards, and differential dirve for left & right useing the motors from before without a speed controler

Title: Re: speed controler
Post by: Admin on October 21, 2007, 07:05:32 PM

Yes, but you need a driver for each motor. Some drivers, such as at dimensionengineering.com, are dual.

Also try servocity.com and look for ESC.

Title: Re: speed controler
Post by: Steve Joblin on October 21, 2007, 07:12:50 PM

The Pololu Dual Serial Motor Controller enables independent control of speed and direction for each of two motors.  That is, at the same time, you can run the left motor clockwise at one speed and the right one counterclockwise at a different speed.

Title: Re: speed controler
Post by: cooldog on October 21, 2007, 07:20:51 PM

the pololu contoler is it as simple as pluging it to my reciver and pluging in my motor or is it more complicated and how does it hook to the motor. can i hook any dc motor to it of the right voltage

Title: Re: speed controler
Post by: Admin on October 21, 2007, 07:25:03 PM

Read the manual! :P
(I mean, we don't memorize product specs . . .)

Title: Re: speed controler
Post by: cooldog on October 21, 2007, 07:26:59 PM

thanks

Title: Re: speed controler
Post by: cooldog on November 25, 2007, 10:03:21 AM

ok thanks ;D ;D

now i am looking for 2 motor controllers cheap that can run a 12v motor
 :o
i don't need speed control 8)

i am on a buget ???

Title: Re: speed controler
Post by: Admin on November 25, 2007, 10:28:20 AM

How many amps would your motors draw?

Perhaps a L298 (http://www.societyofrobots.com/robotforum/index.php?action=search2;params=YWR2YW5jZWR8J3wwfCJ8YnJkfCd8MiwzLDQsNSw2fCJ8c2hvd19jb21wbGV0ZXwnfHwifHN1YmplY3Rfb25seXwnfHwifHNvcnR8J3xyZWxldmFuY2V8Inxzb3J0X2RpcnwnfGRlc2N8InxzZWFyY2h8J3xMMjk4) is what you want?

Title: Re: speed controler
Post by: cooldog on November 25, 2007, 11:02:54 AM

how do i test amps

also it has to plug into my reciver ( i am making a r/c robot ) with no microcontroller

Title: Re: speed controler
Post by: Admin on November 25, 2007, 11:04:56 AM

Use a multimeter or power supply that measures current :P

Title: Re: speed controler
Post by: cooldog on November 25, 2007, 11:08:09 AM

my clap on amp meter doesn't seem to give me a readng in DC ( it won't returne to 0 ) ( according to it there are 40 amps going through my finger )

Title: Re: speed controler
Post by: airman00 on November 25, 2007, 11:45:36 AM

Quote from: cooldog on November 25, 2007, 11:08:09 AM

my clap on amp meter doesn't seem to give me a readng in DC ( it won't returne to 0 ) ( according to it there are 40 amps going through my finger )

Well , if its 40 amps at 120V i think you should see a doctor ,lol    ;D  no just kidding , you'd be dead by now


Perhaps its time to invest in a new multimeter ?

Title: Re: speed controler
Post by: Admin on November 25, 2007, 12:38:41 PM

lol . . .

I believe you have a clamp on amp meter, which uses magnetic fields to measure the current on dangerous high powered wiring. I suspect its just measuring noise . . . or you are Magneto from X-men . . .

Go to radioshack and buy a $15 multimeter :P