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Step 25Arduino power supply
Arduino powered by a separate 9V battery in little box with an on/off switch.
NOTE: Some motor power controllers have a low voltage on board output to power a microcontroller, but the sabertooth doesn't have this. Having a 9V battery like this is just the simplest way around the problem.
This has several advantages:
a) Nice and safe - I fried a £100 gyro once connecting it to one of the 12V batteries (the wrong one)
b) You can debug the software without the main motor controller being powered up.
c) Cheap.
NOTE: Some motor power controllers have a low voltage on board output to power a microcontroller, but the sabertooth doesn't have this. Having a 9V battery like this is just the simplest way around the problem.
This has several advantages:
a) Nice and safe - I fried a £100 gyro once connecting it to one of the 12V batteries (the wrong one)
b) You can debug the software without the main motor controller being powered up.
c) Cheap.
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