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As mentioned in the comments, you cannot power your robot from a 9V block battery. These are made for low power projects (like a smoke detector) and cannot provide enough current to drive even only the motors correctly. Using 2 of them does not really help much. You need to change to a different battery type. If you want to stay with alkalines, you could use ...


0

With very few exceptions, electronic devices only draw as much current as they need, limited by their resistance. The current rating on a power supply is the MAX current it can provide before the voltage drops. Having a higher current power supply may waste energy, but won't hurt anything. According to Ohms law, V = IR Where V = Voltage I = current, in ...


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