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How to test and fix 9 beep / bumber error.
Some video clips and photos I put together while learning how to use OpenShot video editor.
I didn't include any photos/video how to disassemble a Roomba, because there's a lot of tutorials how to do it. Just be careful while opening bumber housing to not drop the axel or spring from the bumber arm.
The led I used was OP140A, that I found from Elfa.
One thing I forgot to mention in the video is, that the leds lens should point towards receiver.
Update...
List of compatible leds can be found here: www.schneordesign.com/Avi/irob...