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01-29-2010, 08:38 PM | #1 | |
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How do I make a " momentary switch " work like a continuous-current switch?
I want to make a " momentary switch (button)" work as continuus-current switch-- in the same way that a typical rear-window defroster button works, in a car; INSTEAD of using a toggle, rocker, or clicking-pushbutton, continuous - current switch.
Obviously there'd be a relay involved but, how would I wire a controller, such as this? ________ SKIN PROBLEMS FORUMS Last edited by LieutenantCracker; 04-21-2011 at 06:15 AM. |
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01-29-2010, 11:15 PM | #2 | |
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Re: How do I make a " momentary switch " work like a continuous-current switch?
A typical rear window defroster switch is also on a timer. Are you wanting something that is on a timer, or a momentary switch that is a press to turn on, press again to turn off? How much current are you looking to switch? Are you wanting something off-the-shelf, or something you would build?
-Rod |
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01-29-2010, 11:23 PM | #3 | |
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Re: How do I make a " momentary switch " work like a continuous-current switch?
No, not something on a timer-- I just used the defrose button as an example.
I imagine building it myself would be more economical, as I have little to no money to spend @ the moment... or in the forseeable future. I already have several of this type of switch / button-- even ones specifically from from Grand Marquis' and Crown Vic's (traction control [full-size button], rear window defrost; as well as some two-wire lead buttons = trunk open, trac ctrl, fuel door, etc). ________ Lovely Wendie99 Last edited by LieutenantCracker; 04-21-2011 at 06:16 AM. |
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01-29-2010, 11:27 PM | #4 | |
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Re: How do I make a " momentary switch " work like a continuous-current switch?
. . . . . Oh, forgot to answer your 1st question: I'm not exactly sure how much current I'd be running. It would be for two medium-sized, and two small halogen fog / driving lights.
________ Brunette Pregnant Last edited by LieutenantCracker; 04-21-2011 at 06:16 AM. |
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01-30-2010, 01:12 AM | #5 | |
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Re: How do I make a " momentary switch " work like a continuous-current switch?
Just curious, not trying to discourage or attack, are you trying to make it blend with the rest of the buttons already in the vehicle? I could probably look at a diagram on Monday for the T/C or something similar and see how the button actually operates XXX device.
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01-30-2010, 07:29 AM | #6 | |
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Re: How do I make a " momentary switch " work like a continuous-current switch?
A gate signal on a SCR can trigger an electronic circuit to turn on.
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01-30-2010, 08:21 AM | #7 | ||
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Re: How do I make a " momentary switch " work like a continuous-current switch?
Quote:
-Rod |
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01-30-2010, 10:20 AM | #8 | ||
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Re: How do I make a " momentary switch " work like a continuous-current switch?
Quote:
A good selection of basic relay circuits on this page, including two latching circuits using a single momentary switch. The price you pay for using the one switch though is that it requires multiple relays - four in total in the first circuit plus two diodes, or the second circuit dispenses with the diodes but requires a fifth relay. That's all a bit clumsy and bulky though and would need careful construction if it was to be reliable in operation. There are latching relays available but I think they require the use of two switches. There will be other solutions too but they're likely to require the addition of a few components - resistors, capacitors, diodes, maybe a transistor or two for coil switching purposes, and I don't know if you would want to go to that level of complexity. Somewhere in the house I have a textbook containing nothing but relay circuits - delayed-on, delayed-off, etc., and that's sure to include a latching circuit or two but I can't find it right now, probably because I haven't used a relay in a circuit in over a decade. A Google search containing the words latching relay circuit would probably lead you to some other solutions. |
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