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| Control motor with Ultimate I/O board? |
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| pixelObsession:
Hey guys, I'm looking at incorporating monitor rotation into my WIP cab project. Currently I have a 19" LCD monitor with mounts on the back that are dead centre to the screen. My experience with motors is pretty much zero - other than making them go on those 100 in 1 electronics kits for the kids ;D I am pondering if the motor could be controlled via an un-used RGB pin on the Ultimate I/O board I have for my controls and LEDs. LED goes on, motor turns? Plus the current could be controlled to slowly turn the motor up or down the same way the brightness is controlled for the LEDs... or am I totally out to left field with this? Failing this, i'm looking at picking up a very basic stepper motor driver and diving into the timeless mvrotate: https://solarbotics.com/product/51090/ The motor I have is pulled from a 5V electric drill I hadn't touched in forever. It actually still has its forward/reverse switch on it in case that can be used in some fashion... but will likley be chopping it down to just its + and - wires. I will be hacking together a homebrew linear actuator out of a bolt, nut and copper pipe. Thanks pO |
| Slippyblade:
I wouldn't do it. While the signal probably could fire a motor, there is more to a motor driver than just pushing the voltage. Motors are inductors, and will generate a back voltage when they stop - that back voltage could well fry your Ultimate. |
| DaOld Man:
I agree with Slippy, the I/O board most likely cannot handle the current of the motor, but you can buy or build a drive that can do the job. The I/O board supplies two signals to the drive (forward and reverse), and the drive does all the grunt work. Here is a schematic to build your own (3rd post down) http://forum.arcadecontrols.com/index.php/topic,129533.0.html But you may be better off to order a cheap "already put together" drive. You will also need a power supply that matches the voltage of the motor and can supply enough current to the motor. EDIT: Your link above is to a drive (I thought it was a link to the motor you are using). I think it will probably work, but it is made for a stepper motor, you may need one made for a standard DC brush motor. Im pretty sure the drill motor is not a stepper, but I could be wrong. |
| pixelObsession:
Thanks for the reply's gents. Makes total sense that the board wouldn't be able to handle the current draw from the motor. And yes DaOldman, I've since confirmed my motor is a simple brush motor, just two wires coming off of it. Looking at ordering one of these two drivers this week: http://www.robotshop.com/ca/en/drv8838-single-brushed-dc-motor-driver.html Or http://www.robotshop.com/ca/en/l298-dual-h-bridge-dc-motor-controller.html I know I don't need the dual bridge, but it has screw terminals! :) I'll post some pics of my contraption once I figure out how to couple my bolt to the motor shaft... Any suggestions? pO Sent from my iPhone using Tapatalk |
| DaOld Man:
--- Quote from: pixelObsession on April 21, 2015, 07:51:07 pm ---Thanks for the reply's gents. Makes total sense that the board wouldn't be able to handle the current draw from the motor. And yes DaOldman, I've since confirmed my motor is a simple brush motor, just two wires coming off of it. Looking at ordering one of these two drivers this week: http://www.robotshop.com/ca/en/drv8838-single-brushed-dc-motor-driver.html Or http://www.robotshop.com/ca/en/l298-dual-h-bridge-dc-motor-controller.html I know I don't need the dual bridge, but it has screw terminals! :) I'll post some pics of my contraption once I figure out how to couple my bolt to the motor shaft... Any suggestions? pO Sent from my iPhone using Tapatalk --- End quote --- Got pics of your motor and the bolt? |
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