More ramblings on stuff & ideas;
The "Kits-R-Us" (model # K180V3 for $38 assembled) UHF rmt ctl 4 relay board that has jumper selectable momentary or latching function (latching is what we need I think) as well as a reset connection for each relay. The description says it allows for a limit switch to be connected to each relay for reseting. The link below is to Carl's Electronics web page. (There is also a two relay version board. But the ten relay Kits-R-Us board kit has NO reset or jumper selectable relay function ability-- that is a real shame !)
I have wondered if one could use limit switches or Hall Effect swts (attached in an adjustable manner onto a rail) to stop the motor at different points (Presets) for different AR positions ? The board has 5V output for swts. You know; press rmt ctl button "One" and the motor starts & drives to limit switch "One" position. Limit swt "One" resets relay "One" on the K180V3 relay board above & motor stops the mask panel in the right spot we've chosen. Have not gotten around to buying this stuff to experiment as yet & constructing such a thing). Guess you might need a second set of limit swts at full open & close to trip another relay to change motor direction or can you piggy back off one set ? I am no electronics guy.
Of course you would need full open & full close limit swts (guess you would need another relay to change motor direction) plus swts for each AR position. Maybe one could use two boards & hack the two remotes and place the little TX boards in a rmt ctl sized project box. That would give; full open, full close & six possible AR points. Not sure how
forward & backward adjustment buttons would be wired in...?http://www.electronickits.com/remote_control/rf4.htm
This link is to "Kits-R-Us" web site photo of the board;http://kitsrus.com/jpg/k180.jpg
EDIT: Just noticed the relays were different colors in the two links above, unsure why, guess they changed components for some reason.
Somewhere in that old Bob Trianas thread in the AVS Archives someone mentioned using Comparator type IC's & "logic table" to build a control board, don't think they ever finished that idea. Hey the simpler the better !
Picaxe makes a very simple $15 combo motor driver & microprocessor board, the "Picaxe-08 Motor Driver Board". Board runs at 6 Vdc MAX, but your loads, motor & otherwise, should not total more than 800 mA @ 4.5 volts
Guess one would have to really watch the stall current of the motor in use. Then their is the programming and will that small IC hold enough code to do what we want? Not sure how far 80 lines & 256 bytes of memory will take you
See link to HVW Tech web page for this little jewel;http://www.hvwtech.com/products_view.asp?ProductID=677
Info on the Picaxe 08M 8-pin IC: http://www.hvwtech.com/products_view.asp?ProductID=515
Man, I hope the rmt ctl antenna motors ScottJ007 & TeeCee are working on will make a great cheap solution !
ifeliciano let us know what you coworker / prof says and how your relay board goes also!
John (I'll hush for now... man this post got long winded, oh yeah I was hushing wasn't I ...)