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Rotating monitor construction *Project finished*
DaOld Man:
I can understand a handling charge for a small order. I just have a problem paying that much for shipping on a package that will probably not be much bigger than the radio shack package i showed a picture of.
Oh well, thats water past the bridge. Just thought I would mention it so everyone else will know what to expect for their budget.
I appreciate you listing all the parts, Koz319.
You know I was just thinking about that headlight motor. If I remember correctly, after some research, I found that these motors operate by raising the headlight until it stops against a mechanical stop. An electronic sensor under the fender senses the motor current going high, and shuts off the motor. When the power is removed from the circuit, the sensor reverses the motor until the motor's current goes high again, bottoming out against the headlight closed stop.
This could be a pretty neat way to go with a monitor rotation device.
It would do away with any limit switches, unless you still wanted some kind of monitor position indication.
I have already started down the road to the H-Drive with my project so Im not going any farther with this new idea.
But if someone else wants to explore this idea, please feel free to do it.
Here's some information: The sensor and the motor both were on a 1988 Pontiac Firebird, with the headlights that come up when turned on, then go down into the hood (actually the fender) when turned off. This may give you some search options for Google or Ebay.
Cornchip:
Also similar to this in a car is the circuitry to stop a window at it's limits (there are no limit switches in a window regulator????). It's buried in the harness...not the motor. Must be the same 'current going high' setup.
Cornchip.
Edit.... This might be called an 'overload relay' or 'Poly Switch' device.
http://www.megastar.com/products/fusetronic/polyswitch/PDF/usb.pdf
danny_galaga:
--- Quote from: DaOld Man on October 26, 2007, 08:33:04 pm ---
Motor:
I had an old 12 volt DC motor in my junk box. I think it may be a windshield wiper motor.
--- End quote ---
that is definitely a windshield wiper motor. just be wary which wires you hook up as some of the terminals are for the auto-park function. many an apprentice has blown the contacts to pieces when hooking these up to a test bench ;D although i guess if you are just using the power supply there wont be enough current to cause any real damage...
roninuta:
I have had good service from Mouser in the past ordering single parts. I have purchased batteries, leds, and other small parts.
From their site:
Minimum Order:
NO MINIMUM ORDER on items normally stocked in our warehouse.
also they have a shipping estimator tool:
http://www.mouser.com/estimateshipping/estship.aspx?sl=0
HTH
DaOld Man:
--- Quote from: danny_galaga on October 28, 2007, 06:29:01 am ---
--- Quote from: DaOld Man on October 26, 2007, 08:33:04 pm ---
Motor:
I had an old 12 volt DC motor in my junk box. I think it may be a windshield wiper motor.
--- End quote ---
that is definitely a windshield wiper motor. just be wary which wires you hook up as some of the terminals are for the auto-park function. many an apprentice has blown the contacts to pieces when hooking these up to a test bench ;D although i guess if you are just using the power supply there wont be enough current to cause any real damage...
--- End quote ---
Actually, the motor I have pictured is not a windshield wiper motor.
Im pretty sure it is a headlight motor. It only has two wires coming out, and it turns forever, change the polarity and it turns forever in the opposite direction.
Notice also the shaft comes out of the end of the motor. This used to have a knob on it, so you can raise or lower the lights by turning the knob, if the motor fails.
Now the link that I posted is a windshield wiper motor, but the site tells how to hook it up to work for what we want (Im pretty sure).
I agree about damaging a windshield wiper motor by connecting it wrong. Thanks for pointing that out, I should have mentioned it in my post.
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