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Motor Answered

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ok so i have a little problem here... i want to make a little electric motor go forward and backward by pressing a single button for each move (so 2 button in total) i got a little image ( poor quality i know but youl get the point) of what i did but its doesnt work :/ thx

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Goodhart (author)2008-03-06

I believe a DPDT switch might serve you here ?

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Goodhart (author)Goodhart2008-03-06

note here as I can't seem to upload the pic.

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koax (author)Goodhart2008-03-08

i'll use your idea or the DPDT switch which is the easier one... thx !

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koax (author)Goodhart2008-03-07

yes i know that kind of switch but i really need something whit to button (push switch or even a controller button) is there another way to make work whit two button ? a bit like in the little image i've upload....

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Goodhart (author)koax2008-03-07

There are DPDT latching pushbutton switches, but without a lamp or such indicator one is never sure if it is "on" or off. When you say 2 button do you mean 2 seperate buttons or a button switch that is push/on - push/off?

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koax (author)Goodhart2008-03-07

2 separate button ( one to go left one to go right)

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caitlinsdad (author)koax2008-03-07

Go to a store where they have toys for toddlers. You can get a cheap remote control car. They have wired remotes(not real radio control) that you can scavenge and reuse for your project. They usually have a forward and reverse button as two buttons on the remote control unit. Better ones have left/right buttons also so you can wire that up for controlling the other axis.

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Goodhart (author)koax2008-03-07

Hmm, then you want a set of buttons, and so they do not conflict, they should be mechanically connected (pushing one, unpushes the other) ? This can be easily achieved with the mechanical portion of a "push button setup" on top of a rocker switch. Would that suffice ?

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germanudo (author)2008-03-07

Use on each minus wire a Diode. Watch out for the right direction. You want to block the Positiv running back to the neutral. Make sure you use only push buttons, so the switch doesn't stay close by accident.

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koax (author)germanudo2008-03-07

even whit diode i have short ( and there are on the good side)......

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koax (author)2008-03-07

A bit off topic but i tink i have a problem .... I receive email of instructables who say that someone reply give me the message but i dont see it here :/

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germanudo (author)koax2008-03-07

I was just thinking about my Idea. I may be wrong. But i have another one. You could use two relais from a car . When you push the button on the blue wire the relais opens the circuit on the green Neutral. If released the neutral close. When you push the button on the green wire the relais opens the blue Neutral.

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CameronSS (author)2008-03-06
It seems like it should work. I usually miss obvious things, but I'll list some possibilities.

  • I'm assuming that you checked to make sure that the battery would actually power the motor through a straight connection
  • Are you sure that you're using normally-open switches? I.e., a switch that normally makes no connection, then connects the circuit when actuated. If you were using normally closed switches, you would be shorting out connections.
  • It always seems too simple: how are your wires connected? Solder, electrical tape, wire nuts, etc.?
  • Do you have any way to take a photo of your contraption? An actual photo would allow people to better visualize your setup.

This is the part where someone like Goodhart or westfw comes in and corrects me...If they do, chances are that they're right.

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CameronSS (author)CameronSS2008-03-06

BTW, does this have to do with your camera platform you asked about a yesterday?

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koax (author)CameronSS2008-03-07

yes its exacly for it :P the guy im making it for what absolutly whit wire no wireless ( whit wireless it will be easy just use a couple of servo....) so its the first time i make it whit wire i was tinking (has here) using a DC motor for the pan and for now dont know what to use for the tilt :P (mayb have a sugestion :P)

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caitlinsdad (author)2008-03-06

I think you have to get double-pole switches. What you essentially need to do is to have two isolated circuits so that the current is flowing in one direction and not being shorted out and confused by the remaining connection when the flow is switched to your DC motor. There is a triple-throw double-pole switch that you can wire up so that you have a forward-off-reverse switch in one. I'm not sure what happens when you press both buttons at once in your configuration. I hope this helps a little but maybe the electricians here will chime in.

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