Hi Folks, would appreciate your help on this one please.
I'm using a SFH618A-2 optocoupler which is connected to a 555 IC output via a 1K5 resistor. When the 555 pin 3 output goes high I get 1.24 V at pin 1 of the optocoupler. Pin 2 of the optocoupler is connected to ground.
I have a camera connected to the "other side" of the optocoupler as per my drawing. The idea is when the 555 is activated, the camera shutter is activated. The camera voltage onto the optocoupler is 3.4Vdc at 9mA when the shutter is activated.
However, the camera side of the optocoupler keeps "blowing". I've done a diode measurement with my meter on pins 1 and 2 and get 1.02V. As far as I can understand on the datasheet I'm within specification. So why is this happening?
I've attached the optocoupler datasheet and a crude drawing of my circuit.
I must be missing something so your guys help will be appreciated.
Many thanks - JDR04
I'm using a SFH618A-2 optocoupler which is connected to a 555 IC output via a 1K5 resistor. When the 555 pin 3 output goes high I get 1.24 V at pin 1 of the optocoupler. Pin 2 of the optocoupler is connected to ground.
I have a camera connected to the "other side" of the optocoupler as per my drawing. The idea is when the 555 is activated, the camera shutter is activated. The camera voltage onto the optocoupler is 3.4Vdc at 9mA when the shutter is activated.
However, the camera side of the optocoupler keeps "blowing". I've done a diode measurement with my meter on pins 1 and 2 and get 1.02V. As far as I can understand on the datasheet I'm within specification. So why is this happening?
I've attached the optocoupler datasheet and a crude drawing of my circuit.
I must be missing something so your guys help will be appreciated.
Many thanks - JDR04
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