Thanks
I have this one,
But I leave in Bulgaria and there is not possible to find this parts on local market.
May be I'll try ti change it with more popular parts.
I'll be happy to see other ideas
I've started project for reading control electricity meter in my home. Device has 2 way for reading.
1. Serial interface 20 mA current loop
2. Standard optical port.
If someone know how to build my own optical reading head this be useful for me.