Hi this is my first thread in this forum.
I am trying to drive a series of LEDs using a trigger signal. I want to isolate the power and ground of the trigger circuit and the LED circuit.
I have wired my circuit as attached and my LEDs are always on (full brightness) regardless of my input trigger signal. My understanding is that if the optocoupler is turned on then 12V will short to ground through the 220ohm resister instead of the LEDs.
I also tried connecting the LEDs between 12V and pin5 of the optocoupler but the LEDs are not as bright (but it triggers). I need to have the LEDs as bright as possible and also triggers depending on the input form the left.
Please tell me what I am doing wrong...
Thanks!
Nina
I am trying to drive a series of LEDs using a trigger signal. I want to isolate the power and ground of the trigger circuit and the LED circuit.
I have wired my circuit as attached and my LEDs are always on (full brightness) regardless of my input trigger signal. My understanding is that if the optocoupler is turned on then 12V will short to ground through the 220ohm resister instead of the LEDs.
I also tried connecting the LEDs between 12V and pin5 of the optocoupler but the LEDs are not as bright (but it triggers). I need to have the LEDs as bright as possible and also triggers depending on the input form the left.
Please tell me what I am doing wrong...
Thanks!
Nina