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First post and I'm in need of help
. To be honest, I'm more used to things I can hit with hammers and am harking back over half my life to my GCSE electronics memories (which are vague to say the least).
I think I'm right on the circuit I've attached as a pdf. But I can't be sure, and need to be 100% confident before I move forward. And it's bound to need tidying and I'm going to have to have missed something!
So, down to business. I am working on a model car door window mechanism that needs to drop 15mm when one switch is momenterally pressed and returns the 15mm when another switch is momenterally pressed (the two press to make switches in the pdf).
As ever in life I have no budget, so it's on the cheap cheap cheap.
Here's what I'm thinking:-
The motor I have is a two poll 12v dc that I have geared to two rack and pinions. So I need a circuit that will turn on in either polarity and stop when limit switches are reached (The two push to break switches).
Two SPDT relays, a motor, two diodes, four microswitches and a battery seems to be the best I can come up with?
Would I need the diodes? Is there a chance of the current after the motor would latch the resting relay (would I need resistors?)? Can anybody out there help me? Please please please, slap me with a kipper if i'm being a fool and I have it totally wrong. But please post a circuit that will work for me (and tell me where I'm wrong or I'll never learn!)!!
Right, sorry for the long blurb, and thanks in anticipation,
Monkey
First post and I'm in need of help
I think I'm right on the circuit I've attached as a pdf. But I can't be sure, and need to be 100% confident before I move forward. And it's bound to need tidying and I'm going to have to have missed something!
So, down to business. I am working on a model car door window mechanism that needs to drop 15mm when one switch is momenterally pressed and returns the 15mm when another switch is momenterally pressed (the two press to make switches in the pdf).
As ever in life I have no budget, so it's on the cheap cheap cheap.
Here's what I'm thinking:-
The motor I have is a two poll 12v dc that I have geared to two rack and pinions. So I need a circuit that will turn on in either polarity and stop when limit switches are reached (The two push to break switches).
Two SPDT relays, a motor, two diodes, four microswitches and a battery seems to be the best I can come up with?
Would I need the diodes? Is there a chance of the current after the motor would latch the resting relay (would I need resistors?)? Can anybody out there help me? Please please please, slap me with a kipper if i'm being a fool and I have it totally wrong. But please post a circuit that will work for me (and tell me where I'm wrong or I'll never learn!)!!
Right, sorry for the long blurb, and thanks in anticipation,
Monkey