View Full Version : Time delayed output?

08-06-2005, 09:22 AM
Time delayed output? How can I get my Stamp to trigger a 555Timer (or something similar) and have it
produce an output, say, 1-100ms later·(based on a potentiometer setting)? I can't seem to find a circuit to do this. Thanks, LarryinFreeporthttp://forums.parallax.com/images/smilies/rolleyes.gif·

Post Edited By Moderator (Chris Savage (Parallax)) : 8/6/2005 2:24:46 AM GMT

08-06-2005, 12:59 PM
and the stamp interface is attached.


08-06-2005, 03:54 PM
Also, just to make sure you know this, the 555 is triggered when the trigger is pulled to ground, and the trigger should remain high, or 5V+.


08-07-2005, 07:17 AM
Thanks, I'll give it a try!

08-08-2005, 12:50 AM
Thanks for the suggestion, but I still can't seem to get it to do what I want. Attached is a timing diagram of what I am looking for. Any suggestions?.... LarryinFreeport

08-08-2005, 05:52 AM
What is the time delay you are looking for between stamp output and 555 output?
Does the stamp output trigger more than just the 555?


Philip Gamblin
08-08-2005, 07:57 AM
If the 555 is used for thetiming delay, why bother with the Stamp. Use RCTIME to read the the pot, wait for a delay based on the value of the pot, then do what you want.

08-08-2005, 08:15 AM
The timing would be in the order of 50 to 150 ms. The stamp is reading a number of inputs and performing some logic on them. When the condition is right, the stamp output would change state (go from a 1 to a 0 or vis versa). This output would trigger another external piece of equipment. The operation of that device would take between 50 & 150 ms. I am trying to simulate that external device with the "timer"....