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Cyb

CamMan and pic12f508

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Hello,

I have succesfully build the CamMan circuit using a PIC12C508. Now I want to build another one but I only have a PIC12F508. I made the circuit on a bredboard for testing purpose, and used a LED connected to the shutter output. I expected to see the LED to blink when I moved the stick full down and full high, but nothing happens.

How much time is the shutter output active?

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It is active for 250mS. Glad to hear that your PIC12F508 worked.

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Ok I reply to myself :)

This open collector output activates the camera shutter. It momentarily goes Low upon a snapshot request.

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The camera I'm trying to modify draws about 300ma. Is it OK to power it using the receiver?

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It sounds like a marginal idea to me. How is the Rx powered (direct 4-cell or ESC with BEC)? If it is via a BEC, you need to observe its specs (count the CONSTANT 300mA load as 1X to 1.5X sport servos).

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You're right, it draws a little bit too much current. The camera works, but stop when all servos are working.

So if I'd have powered it using 4 direct cells, would this have worked? Is there any current limitation when not using BEC?

does powering it using the plane's battery and a regulator is a good idea or not ?

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does powering it using the plane's battery and a regulator is a good idea or not ?
There are many variables to this decision. To keep it simple, just use a small dedicated camera battery that provides the exact voltage the camera requires.

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Ok I leaved the batteries in the camera...

Now I have another question about PIC programming. How do you configure output pins as open collector like the shutter pin (asm instruction) , I read the datasheet but I did not find anything...

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