Need help on some cheap ways to control dc motors with a rc
transmitter

Want to control 2 dc motor's at 1 amp each and want to use a rc like in remote control cars and want something similar to the motor mind c.

__________________
Robotics is heaven in my book.

 

http://www.hot.ee/ototot/muud/Mudelauto-27MHz-skeem.pdf reciever
http://www.hot.ee/ototot/muud/Mudelauto-27MHz-pult.pdf transmitter

__________________
Need Help?
Press F1
If that doesn\'t help you, ask me... I might know better.

 

Thanks, but do you know if this circuit works?

__________________
Robotics is heaven in my book.

 

They look to be the type os systems used int he really cheap radio controlled toys you get, not a 'proper' RC system.

I presume you're looking for something to give 'tank' like controls from a standard radio control transmitter? - this is called 'differential steering', PIC's are commonly used to interpret the receive side and generate the required PWM for the motors.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

I thought it was called skid steering??

meh, i think they achieve this with a single high power motor. The differential then distributes the torque into both sides of the tank. Now to make it steer simply apply a braking force to one side and all the extra power is now applied to the other side of the drive train nifty ey??

The only problem is that both sides cant turn at the same time in opposite directions.

__________________
www.winpicprog.co.uk - Great PIC language tutorials.

 

Yes that is exactly what I am talking about, but what is the best motor controller to go with.

I am responding to Nigel

__________________
Robotics is heaven in my book.

 

PIC's + 433Mhz radio modules make a good match. Worked for my car (tank) :twisted:

check out my insane tank here:

http://www.electro-tech-online.com/v...highlight=tank

lotsa pictures, may take a while to load.

__________________
www.winpicprog.co.uk - Great PIC language tutorials.

 

Same thing!.

For robots and models it's almost always done with two motors, one for each side. With two h-bridges and suitable software it makes it simple to drive, including turning on the spot.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

You need two h-bridges, plus a suitable micro-controller, the PIC16F876 is a good choice, as it has two hardware PWM channels.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

A home made h-bridge would work wouldn't it
something like this
it is a mosfet

__________________
Robotics is heaven in my book.

 

That's the sort of thing, there are lots of discussions on these forums about h-bridges!.

BTW, posting a .DOC file isn't really a very good idea, it's over 1mB in size, for a picture that's probably only 20kB!.

__________________
PIC programmer software, and PIC Tutorials at:
http://www.winpicprog.co.uk

 

Thanks

also I had to go
so I just uploaded the file and didn't have the file on anything else so I had no choice but to put that one.

sorry.

__________________
Robotics is heaven in my book.

 

Not if your running 31cc petrol/gas engines :shock: :twisted: !!

__________________
www.winpicprog.co.uk - Great PIC language tutorials.

 

Nigel was refering to dc motors
which I indicated at the top of this page.

__________________
Robotics is heaven in my book.