Build Your Own Arcade Controls Forum
Main => Main Forum => Topic started by: Bender on November 22, 2009, 10:25:22 pm
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I'm working on a little arcade project as a Christmas gift and I'm using an portable DVD player as the screen, but it doesn't automatically switch to the line in, I have to hit a button a few seconds after it turns on to get it to switch. I want to make it so that it will do it automatically, anybody know how to do it?
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=90051.0;attach=133880;image)
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anyone?
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These (http://www.drdetailshop.com/528T.htm) will give you either a timed off or a timed on, and they are adjustable. So you could get 2 of them and make it work. The first one would set the delay you need, triggering the second one. The second one would be needed to simulate a momentary button press. I am assuming this is what you are trying to do. I have seen them as cheap as $10 before.
Also, I work with some electrical engineers, I can ask them how easy it would be to design a circuit.
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You are looking for a "delayed one shot" circuit
check out:
http://www.bowdenshobbycircuits.info/page9.htm (http://www.bowdenshobbycircuits.info/page9.htm)
and scroll down to "Generating a Delayed Pulse Using The 555 Timer"
...or you could just buy a "time delay relay" however the ones with at function are usally ~$100
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You are looking for a "delayed one shot" circuit
check out:
http://www.bowdenshobbycircuits.info/page9.htm (http://www.bowdenshobbycircuits.info/page9.htm)
and scroll down to "Generating a Delayed Pulse Using The 555 Timer"
...or you could just buy a "time delay relay" however the ones with at function are usally ~$100
Nice! Great job Beley. Very interesting projects on that page.
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555 timer! W00T! I have dealt with them before (albeit in a 500 in 1 electronics kit designed for us "kids" to learn about electronics).
I would have suggested a capacitor with a relay myself, but go with the timer IC as it would be cleaner.
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555 timer! W00T! I have dealt with them before (albeit in a 500 in 1 electronics kit designed for us "kids" to learn about electronics).
I would have suggested a capacitor with a relay myself, but go with the timer IC as it would be cleaner.
can you explain the capacitor w/ relay and what a timer IC is
assume I'm a little slow (cause I am)
one other thing, I need this to be as cheap as possible I'm trying to bring the whole project in at $100 or less
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555 timer ICs are somewhat common among electronics hobbyists. Basically, and i mean very basic, it's an IC that you can set up with a trigger or variable resistor to control the internal timing clock. Someone jump in and correct me if I'm wrong here
It's useful for an automated looping event, such as rapid-fire buttons in a game controller.
I'm not 100% on this, memory's a bit hazy. Maybe there was a crystal in place of a variable resistor. I'm fairly certain you can find these ICs in common electronics stores.
RatShack (http://www.radioshack.com/product/index.jsp?productId=2062595) has them, too! Also their big brother the 556 (http://www.radioshack.com/product/index.jsp?productId=2062597), which is essentially 2x 555s in one IC.
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Another idea you may want to think about is modifying a standard "LED chaser" or "LED sequencer" you can usually find these as kits. you would only need to cut one connection and add a jumper. below is a generic circuit and then one showing the changes needed to make it do what you want