I wanted to get some suggestions from all of you people for my first robot project. After searching the Intenet for two weeks, I found this cheap Robot wheeled kit for just 10 bucks. It has two 3V DC motors.
I have an Arduino Uno, And I want to build a robot with that kit.However, I don’t feel like spending another 10 bucks for just an Arduino Motor Shield so I want to make my motor power supplies out of a voltage regulator, which i’ll get from RadioShack.
Later on I’ll probably buy a Ping! Sensor for 30$ but for now i’ll try to do some experimenting with 2 photon resistors that came with my MAKE: Getting Started with Arduino Kit. And if I’ll want, i’ll invest then a Motor Shield
But i’m worrying that the Regulator voltage is to hight for such small motors. How can I apply the ohms Law and find the needed resistance since i’m really bad at this? I just don’t get one thing: Does Voltage decrease proportionally to the Amperage when you add a resistor? Or just the voltage decreases?
Thank You Guys,