Hello. I am currently working on a simple robot project that uses a servomotor, a DC geared motor and a weird IR reciever.
The thing is near completion, but I still have one big worry on the electronic side: I would like to make the thing run on its own, without any cable. [u]I currently have a 9V battery feeding my DC through an H-bridge, and I would like to know if it was safe to also run the battery in the arduino's Vin[/u]. (While I did hear that 9V batteries are short-lived, I will not take another one: this project is mostly experimental, I want to see it roll)
Also, the servo is currently powered through the arduino's 5V: is it that bad?