RoombaVirtualWall

Virtualwall for Roomba 500, 600, 700, 800 and 900 series

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Roomba iRobot virtualwall

For Roomba 500, 600, 700, 800 and 900 series
Uses two AA battery (2x1.5V=3V)
ATTINY85 Microcontroller

     <----------490us and 19 pulses----------------->
     <---25us---->                                   <--- 130ms (power down      ) ---->
     
     |-----|     |-----|          |-----|     |-----|                                   |------|
     |     |     |     |          |     |     |     |                                   |      |
     |     |     |     |          |     |     |     |                                   |      |
     |     |     |     |          |     |     |     |                                   |      |
_____|     |_____|     |_____.....|     |_____|     |_______________......______________|      |____

R1=47R

R2=200R

VCC=2x1.5V(AA battery) = 3V

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