- #1
hisham.i
- 176
- 2
Hello,
I want to design an AC voltage indicator. So i designed the circuit attached, but now i am trying to calculate the value of the resistor R1.
I have the following problem:
1- The voltage should be given at the terminals of the optocoupler.
2- The minimum current that should flow through the optocoupler in order to turn on the photo transistor.
3- How can i find these info. in the datasheet i tried to open the data sheet for PC-217 opto coupler but i wasn't able to find them.
Thanks
I want to design an AC voltage indicator. So i designed the circuit attached, but now i am trying to calculate the value of the resistor R1.
I have the following problem:
1- The voltage should be given at the terminals of the optocoupler.
2- The minimum current that should flow through the optocoupler in order to turn on the photo transistor.
3- How can i find these info. in the datasheet i tried to open the data sheet for PC-217 opto coupler but i wasn't able to find them.
Thanks