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Small DC motor control

Small DC motor control

Small DC motor control

(OP)
Hello, I need some help in controlling a window blind.  What I have is a 12VDC at 8 Amp power supply connected to a 3 pole wall switch that controls a DC motor.  The wall switch has up position for forward (close blind), a cross wired down position, flipped polarity, for reverse (open blind) and a center position for no voltage to the motor.  At the end of travel for the blind a micro switch stops the motor.  What I want to do is replace the 3 pole switch with a motor control driver that can be controlled with a control relay or RS232.  All the driver will have to do is be able to handle the 12 VDC 8 Amps supply and load and be able to flip the polarity to the DC motor to run it forward and reverse.  Plus have an OFF or no voltage position so I can stop the blind in mid travel.  I came across a motor control from Penta Power that will do this and more, the KBBC-24M 9500.  However this neat little controller does more than I need and cost too much, about $266 per unit.  Is there another controller out there that will do what I need and be less expensive?  I know I can come up with a couple of DPDT power relays and throw them in a box but I am shooting for a better solution.
Thanks.

RE: Small DC motor control

go to www.electronics123.com for some cheap kits.  Maybe you can adjust your thinking to match one of these.

RE: Small DC motor control

(OP)
Thanks for the input guys, but I still can't find anything that will work that won't cost an arm and a leg.  Even a reversing contactor is expensive if I could find one that would be the right voltage.  Well I guess I will buy a box and put some relays in it and control my motor that way.  I would think with all of the home automation out there it would be a breeze to find small motor controls.  I guess everyone builds there own proprietary equipment and doesn’t worry about interfacing with other automation.
Anyway thanks for the help.

RE: Small DC motor control

Suggestion: The DC relays with higher current rating of their contacts might be used. They are less expensive; however, they are not inexpensive either.
Visit:
http://www.thomasregister.com
and type relays: dc under product or service, which will return 49 companies to approach to

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