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Electronics => Electronics => Topic started by: Klek on August 19, 2007, 02:47:55 PM

Title: Cheap binary motor control
Post by: Klek on August 19, 2007, 02:47:55 PM

I am looking for some way to get cheep (<$300, or even better <$200) binary motor control that can handle a continuous load of +70 amps at 36 volts. Perffbly something I can easily control with a basicatom chip through Futaba/JR style connector. For similar but smaller project I used one of these radio relays (http://www.teamdelta.com/pdf/rce220r5.pdf) with much success
When I tried to figure it out using a series of relays and solenoids it didn't come out much cheaper than a motor controller.

Any ideas?

Title: Re: Cheap binary motor control
Post by: Admin on August 20, 2007, 08:34:59 AM

Hmmm cheap binary control . . . a relay can easily handle those specs. What you want is to connect a digital output pin from your controller to a MOSFET (a transistor), then control a relay through that MOSFET.

I believe there are MOSFETS today that can handle those specs without the relay, but you may have difficulty keeping it from frying itself . . .