| Main > Main Forum |
| Electronics help! Need to make an auto switch delay (for a small bartop project) |
| (1/2) > >> |
| Bender:
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? |
| Bender:
anyone? |
| mountain:
These 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. |
| Beley:
You are looking for a "delayed one shot" circuit check out: 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 |
| mountain:
--- Quote from: Beley on November 23, 2009, 08:44:09 pm ---You are looking for a "delayed one shot" circuit check out: 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 --- End quote --- Nice! Great job Beley. Very interesting projects on that page. |
| Navigation |
| Message Index |
| Next page |