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 From:  Chris (CHRISSS)   20 Aug 2015 21:25 
 To:  ANT_THOMAS       412 of 542 
40898.412 In reply to 40898.405 
I can't open attachments on my Kindle. I'm avoiding any new threads with attachments til I get home. Looks like you have a nice bit of attic space. Mine is pretty big but there are s many bits of wood supporting the roof (I don't know the tevhnical term for them) that it makes it very awkars to move around the attic.
Me
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 From:  ANT_THOMAS    26 Aug 2015 11:49 
 To:  koswix      413 of 542 
40898.413 In reply to 40898.391 
On the windscreen wiper motor.

Is it generally a simple case of polarity changing to switch direction? Or is it a little more complicated?
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 From:  koswix   26 Aug 2015 13:31 
 To:  ANT_THOMAS       414 of 542 
40898.414 In reply to 40898.413 
Depends on the motor (generally: permanent magnets, no. electromagnets, yes), but probably easier just to use a linkage to reverse direction. That way for half the time the door is opening and half the time it's closing, but the motor runs constantly in the same direction.

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If Feds call you and say something bad on me, it may prove what I said are truth, they are afraid of it.
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 From:  CHYRON (DSMITHHFX)   26 Aug 2015 13:37 
 To:  ANT_THOMAS       415 of 542 
40898.415 In reply to 40898.413 
The motor will fail, and you will be trapped up there, your muffled shouts drowned out by the tv and traffic.

After a week of missing posters on shop windows and telephone poles, and cops scouring the neighborhood, it will be assumed you ran off, or just got offed.

Years later, your dried husk will be found with broken fingernails and deep scratches in the hatch, after your family moves away.

Or, you can stop right now.

----
"The general aim of these science fiction writers is to frighten the people into a state of paralysis or psychological incompetence bordering on hysteria" – FBI informant
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 From:  ANT_THOMAS    26 Aug 2015 14:39 
 To:  koswix      416 of 542 
40898.416 In reply to 40898.414 
I still don't understand :((

So let's say I was to apply a voltage to the relevant wires it wouldn't turn 360 deg continuously? It would go, say, 180 deg and back again?

I just want a simple motor I can turn 360 for a set amount of time, then -360 deg.

Also, my hall effect sensors arrived, but I forgot to order magnets. I've had so much stuff from China arrive in less than 2 weeks recently. One item in 7 days too.
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 From:  ANT_THOMAS    26 Aug 2015 14:39 
 To:  CHYRON (DSMITHHFX)      417 of 542 
40898.417 In reply to 40898.415 
I think I'll fit an emergency axe in the attic.
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 From:  koswix   26 Aug 2015 16:39 
 To:  ANT_THOMAS       418 of 542 
40898.418 In reply to 40898.416 
https://youtu.be/D_KIOr_TpcM

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If Feds call you and say something bad on me, it may prove what I said are truth, they are afraid of it.
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 From:  ANT_THOMAS    26 Aug 2015 17:10 
 To:  koswix      419 of 542 
40898.419 In reply to 40898.418 
Thank you :$
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 From:  koswix   26 Aug 2015 17:21 
 To:  ANT_THOMAS       420 of 542 
40898.420 In reply to 40898.419 
It's done like that because rapidly switching the direction on a motor (like windscreen wipers would have to) is really not nice for the motor, especially when there's a biggish load on the motor. 

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If Feds call you and say something bad on me, it may prove what I said are truth, they are afraid of it.
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 From:  ANT_THOMAS    26 Aug 2015 17:36 
 To:  koswix      421 of 542 
40898.421 In reply to 40898.420 
Makes total sense, and I quite like that video. I could probably get one for a fiver at the scrap yard or 7 quid buy it now on ebay. I think I'll buy one and have a play.
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 From:  koswix   26 Aug 2015 17:46 
 To:  ANT_THOMAS       422 of 542 
40898.422 In reply to 40898.421 
Worst case scenario you have a relatively small, relatively high torque motor. That'll definitely find itself another use if it's not suitable for the door thing.

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If Feds call you and say something bad on me, it may prove what I said are truth, they are afraid of it.
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 From:  ANT_THOMAS    30 Aug 2015 19:04 
 To:  ALL 423 of 542 
40898.423 
Discovered you can make a H Bridge using two relays. I happen to have a 2xRelay module which is now working as a H Bridge. Really really simple to use. If the relays are the same (high/low) the motor would be off. Set one relay high to turn the motor, swap which is high to change direction.

Eg
L/L & H/H - Off
L/H - Forward
H/L - Backwards
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 From:  ANT_THOMAS    31 Aug 2015 13:29 
 To:  ALL 424 of 542 
40898.424 
Super dull video

Arduino, 433 MHz receiver, relay module and hall effect sensor.

The idea is to have the motor running for x seconds, but if the hall effect sensor is triggered it stops. A bit of a fail safe to stop the motor in case it is already fully open.
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 From:  ANT_THOMAS    2 Sep 2015 17:23 
 To:  ALL 425 of 542 
40898.425 
Erm, I shouldn't have bought a rear wiper motor. Back to ebay (or hack this apart).
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 From:  ANT_THOMAS    5 Sep 2015 11:26 
 To:  ALL 426 of 542 
40898.426 
That's better. Ford Focus front wiper motor.

It's got quite a kick to it.
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 From:  Monsoir (PILOTDAN)   5 Sep 2015 11:55 
 To:  ANT_THOMAS       427 of 542 
40898.427 In reply to 40898.426 
Your vid is private :(

Dan Herman
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 From:  ANT_THOMAS    5 Sep 2015 11:58 
 To:  Monsoir (PILOTDAN)      428 of 542 
40898.428 In reply to 40898.427 
Should work now.
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 From:  Monsoir (PILOTDAN)   5 Sep 2015 12:00 
 To:  ANT_THOMAS       429 of 542 
40898.429 In reply to 40898.428 
Haha - they've got some real torque haven't they!

Dan Herman
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 From:  ANT_THOMAS    5 Sep 2015 17:29 
 To:  ALL 430 of 542 
40898.430 
Bloody hell, it actually works.

Need to add the magnets/hall sensors - edit: added one for opening, works well.
Change the open/shut duration,
Support the upright better,
Possibly switch the side of the motor because it is slower in one direction compared to the other. I'd rather the closing direction be slower and more controlled.
Add some flyback diodes.
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 From:  ANT_THOMAS    14 Sep 2015 20:50 
 To:  ALL 431 of 542 
40898.431 
Used the an Arduino app on Android for the first time the other day "ArduinoDroid". Not the best app but still really useful. Saves disconnecting everything or bringing a laptop into the attic to tweak the sketch.
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