For an infrared based webcam on a battery I need to trigger the following sequence initiated by a PIR (5 volt) at night:
I hope I can realize this by a nontriggerable digital counter. It means a lot fewer parts
Any suggestion?
- illuminate the object for 5 sec (Save battery-energy)
- trigger the smartphone to take a picture
- Do not take a picture during 600 sec. (Save battery-energy)
- I designed a 600 nonretriggarable monostable 555 for step 3 by realizing a 600 sec positive pulse with the U2 NE555 block monostable started by a movement detected bij the PIR
- At the same time the object is illuminated for 5 secs. A 5 sec positive pulse is realized by the U4 NE555 monostable for the illuminator.
- With a delay of 1 sec the webcam is triggered to take the picture ( positive pulse width 1 sec). Circuit not shown.
I hope I can realize this by a nontriggerable digital counter. It means a lot fewer parts
Any suggestion?