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[Paparazzi-devel] Opto-coupler to trigger a camera on Umarim


From: Joseph Muhlhausen
Subject: [Paparazzi-devel] Opto-coupler to trigger a camera on Umarim
Date: Sun, 6 Jan 2013 12:57:35 -0500

Hi All,

This is my first post on the list. 

I recently got a Umarim from PPZUAV. 
I want to trigger a camera from one of the ADC using a 4N25V opto-coupler (http://www.datasheetcatalog.org/datasheet/vishay/83530.pdf

Based on the opto-coupler specifications I calculated that I need a 42 Ohm resistor from the IO to the Anode. and connect the Cathode to the Umarim GND.

The result should be 3.3V pulse from IO = Opto-coupler Transistor Closed

Am I reading that right?

Regards,
Joseph


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