Hi All,
Trying to interface an active low output to an active low input. Sounds easy but the output from the GPIo is 3.3V and the input to the circuit is ran from 12V supply. Since the 555 is negative edge triggered i dont think i can use a NPN transistor or the transistor will always be on. I am a little wary of using a pull up on the 3.3V line as i dont know if it can handle 12V.
Anyone suggest an easy way to interface the two?
Thanks
Trying to interface an active low output to an active low input. Sounds easy but the output from the GPIo is 3.3V and the input to the circuit is ran from 12V supply. Since the 555 is negative edge triggered i dont think i can use a NPN transistor or the transistor will always be on. I am a little wary of using a pull up on the 3.3V line as i dont know if it can handle 12V.
Anyone suggest an easy way to interface the two?
Thanks