Wheels/Motors/... - Page 2 - Electronic Circuits Projects Diagrams Free

Bryan76 · 19th May 2007, 08:28 PM

So is there a good place to buy Servos, Steppers, and regular motors?

upand_at_them · 19th May 2007, 10:14 PM

And the quality of the Tamiya gearboxes is just amazing for the price. I've got the same Twin Motor gearbox that I'm using for a line follower.

Also, to the original poster: Check out David Cook's website http://www.robotroom.com/ and his books.

Mike

27th May 2007, 10:33 PM

*READ*

I reccomend using brush Gearhead motors, they are cheap and lightweight, depending on what you get.

This site is excellent for gearhead motors that are $7.75 that come with mounting wheel also!

www.solarbotics.com

27th May 2007, 10:38 PM

then click on motors, and go down until you see
GMPW Deal - GM2/3/8/9/17 with GMPW.

I reccomend the GM3 wheel deal(which is in the dropdown menu near the price indicator), it has 43 rpm which is 27ft per min, and runs on 3-12 volts. Somewhat smallish, larger than 9volt by a bit, and has very high torque for such a small motor. WORTH IT!!!

ootwoly · 28th May 2007, 07:30 AM

what kinda circuits needed to control the steering of the motors?
any samples?

artqny · 6th June 2007, 03:27 AM

When I made my line-following robot it had 2 powered wheels and a caster. I steered it by having an LM393 comparator chip compare inputs from two photoresistors on either side of the line, and then signal the corresponding motor to turn until the inputs change. Even though only one motor turns at a time, it is able to oscilate quickly and stay on the line fairly well.

ootwoly · 7th June 2007, 01:43 AM

thanks for that...

i've got other opinion in using servo motor with the control of a relay. i think this will be simpler. currently working on it still. anyway thanks for the advice bro!

ootwoly · 7th June 2007, 08:45 AM

hi...

i've tested on my relay and servo motor. but it seems like the motor is drawing a very high current at about 200mA in order to work. my relay isn't working or rather there's no clicking sound at lower current.

anyone can tell me what is the problem?

it is impossible to supply that high current to power up the motor since my PIC 16F877A can only gives maximum 25mA.

**Nigel Goodwin** · 7th June 2007, 10:54 AM

Quote:

Originally Posted by ootwoly

hi...

i've tested on my relay and servo motor. but it seems like the motor is drawing a very high current at about 200mA in order to work. my relay isn't working or rather there's no clicking sound at lower current.

anyone can tell me what is the problem?

Perhaps you've connected it wrongly?, post the circuit so we can advise.

Quote:

it is impossible to supply that high current to power up the motor since my PIC 16F877A can only gives maximum 25mA.

The motor current isn't anything to do with the PIC, that should only be supplying control pulses to the servo - probably only uA's?.

Again, post the circuit so we can see.

blueroomelectronics · 11th June 2007, 02:11 AM

Quote:

Originally Posted by ootwoly

what kinda circuits needed to control the steering of the motors?
any samples?

Try this it's a typical L293D circuit. The RA0 thru RA3 can be any digital output pin from the PIC. It also has the clamp diodes you need on the motors

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19th May 2007, 08:28 PM	(permalink)
Bryan76	So is there a good place to buy Servos, Steppers, and regular motors?

19th May 2007, 10:14 PM	(permalink)
upand_at_them	And the quality of the Tamiya gearboxes is just amazing for the price. I've got the same Twin Motor gearbox that I'm using for a line follower. Also, to the original poster: Check out David Cook's website http://www.robotroom.com/ and his books. Mike

27th May 2007, 10:33 PM	(permalink)
Souper man	READ I reccomend using brush Gearhead motors, they are cheap and lightweight, depending on what you get. This site is excellent for gearhead motors that are $7.75 that come with mounting wheel also! www.solarbotics.com

27th May 2007, 10:38 PM	(permalink)
Souper man	then click on motors, and go down until you see GMPW Deal - GM2/3/8/9/17 with GMPW. I reccomend the GM3 wheel deal(which is in the dropdown menu near the price indicator), it has 43 rpm which is 27ft per min, and runs on 3-12 volts. Somewhat smallish, larger than 9volt by a bit, and has very high torque for such a small motor. WORTH IT!!!

28th May 2007, 07:30 AM	(permalink)
ootwoly	what kinda circuits needed to control the steering of the motors? any samples?

6th June 2007, 03:27 AM	(permalink)
artqny	When I made my line-following robot it had 2 powered wheels and a caster. I steered it by having an LM393 comparator chip compare inputs from two photoresistors on either side of the line, and then signal the corresponding motor to turn until the inputs change. Even though only one motor turns at a time, it is able to oscilate quickly and stay on the line fairly well.

7th June 2007, 01:43 AM	(permalink)
ootwoly	thanks for that... i've got other opinion in using servo motor with the control of a relay. i think this will be simpler. currently working on it still. anyway thanks for the advice bro!

7th June 2007, 08:45 AM	(permalink)
ootwoly	hi... i've tested on my relay and servo motor. but it seems like the motor is drawing a very high current at about 200mA in order to work. my relay isn't working or rather there's no clicking sound at lower current. anyone can tell me what is the problem? it is impossible to supply that high current to power up the motor since my PIC 16F877A can only gives maximum 25mA.