Mini Diffrential IR sensor for Anet A8

I adopted it from DC42 design publiced on https://github.com/dc42/OrmerodSensorBoard
The layout is med by Eagles on single side PCB
+The firmware is littebit modified in MiniLedSensor.cpp#
- original
const unsigned int PortBNearLedBit = 1;
const unsigned int PortBFarLedBit = 0;
- modify
const unsigned int PortBNearLedBit = 0;
const unsigned int PortBFarLedBit = 1;

The fuse of tiny25/45/85 as 0xE2; 0xDF, 0xFF
avrdude argument: -U lfuse:w:0xe2:m -U hfuse