T&L Publications

looking for a motor controller that will not break the bank..
i am looking for a 2ch analog motor controller. seen some but they were over $70.00
i am wanting to build me a small PTZ mount for a camera to use on my plane.
i'll be using small modified servos.
i have the joystick, it is 5Kohms 2 axis the current is very small not even 2amps per motor.
and it will operate off of 12v or less.

Would this work?
http://www.ebay.com/itm/PWM-DC-12-24V-M ... 0569517437

Hmmm.............

How about getting one of those cheap RC cars from a Dollar store, or Thrift store.
Gut the car for the receiver and the controller.

Or find one of those wired remote cars.



Signed: Janitor Tzap

nope,, i need something reversible, and not R/C
i am needing it to be able to work with a dual joystick ( X Y Axis ) center positions being off.

Not sure whether I've understood your requirements properly, but assume you've had a sniff around these sites:
https://www.sparkfun.com/categories/179

Okay.....
Hows this sound....

You want the camera to spin around a complete 360 degrees.
Tilt up or down, and control the zoom, and focus.

For the 360 degree, you could use a simple Toggle\Rocker switch.

Forward - OFF - Reverse.

Same for the other functions.
Then put stop/shut off switches at the end of travel of the, spin, tilt, Zoom, and focus mech.
So you don't strip out the gears when it reaches the end.


Signed: Janitor Tzap

i do not want to use switches, i want variable speed using a joystick..
center position is stop..any direction is moving in that direction, but variable speed,
full swing = full speed, partial movement = slow.
i was looking at something like this, but too cheaper, i only need 1-2 amp ability as
it will be driving very small motors such as in a R/C servo. i'll be using 12v.
can be lower as a regulator is not a problem

https://www.servocity.com/html/roboclaw ... dSwW30YGf4

.

Big question is, are you trying to drive DC motors, or R/C servos? R/C servos operate on pulses, not DC.
That $70 controller you mentioned will not run servos, only motors.

i am going to be using a modified servo...it will be gutted out and only using the motor and gear train.
so it will be a DC motor driven..

Perhaps this then:
http://www.allelectronics.com/make-a-st ... fng/1.html

i looked at this one..but it does not handle analog inputs, only PWM

So basically you want one of these......


I think that the $60 for a unit that is similar to this is a good price.
I've seen others that are in the $100 to as high as the $800 dollar range.
But they can control multiple cameras on a CCTV system.

Yeah, I know.
Building it is half the fun.
Only you may find that building a custom controller may cost more than the one you can get for $60.

Good luck with it.


Signed: Janitor Tzap

nope,, that is not feasible to have in my plane, and that PTZ controller communicates via serial usually.
i have one of them from Pelco already.

all i need is a small bi-directional, 2 channel motor controller that can be controlled Via. Analog input.
i am looking for in the $30-$40 range.
like i said i want it for use on my Plane.

Now I'm starting to understand!
How about replace the lamp with your motor, and use a smaller MOSFET here? (The BUZ11 is a 30 amp device)
https://www.google.com/url?sa=i&rct=j&q ... 6414884678

i still think you do not understand...

the circuit needs to be variable speed reversible. joystick right makes motor goes 1 way..joystick left makes motor go the other way.
same deal for 2nd motor and joystick up / down.

i think maybe a micro H-Bridge would work if it could have analog input from the joystick POTS ( 5K )
but the joysticks do not have full swing from one end to the other for resistance..