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

[Eduardo Lavratti]

... current drawing of camera trigger ?

the resistor need to be between umarin and optocoupler ! the other side of opto-coupler are connected direct to camera shot button.

On Sun, Jan 6, 2013 at 4:40 PM, Michel GORRAZ <address@hidden> wrote:

Hi Joseph,

I should work, as long as you correctly calculate the LED resistor (related to the current drawing of you camera's trigger input...)

@+
Michel

2013/1/6 Joseph Muhlhausen <address@hidden>

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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