555 timer circuits for digital camera trigger
- From: DorkyGrin <jchickering@xxxxxxxxx>
- Date: Sun, 28 Sep 2008 19:24:48 -0700 (PDT)
I've got a digital camera that I am trying to connect to a motion
sensor. I've disassembled it and have the wires available to wire into
a circuit. I have three relays. I need a circuit to trigger the camera
in this fashion:
1. Receive signal, activate Relay A and hold for 10 seconds
2. Same signal, after a couple of seconds, activates Relay B for 5
seconds
3. Same signal, after a couple of seconds, activates Relay C for 2
seconds
4. Then reset all relays for next event
These steps simulate Power, Focus and Shutter.
It's been awhile since I've worked with 555 timers, but I think tying
them together in a circuit might be the simplest way to make this
happen. I believe a 555 timer configured as a monostable one-shot
could be used for Relay A. What I'm not sure about is steps 2 and 3,
maybe a 556 timer that has some sort of startup delay?
Or would this project be easier with some sort of PIC?
Open to ideas.
Thanks
.
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