I want to get started working with circuitry and I have a few questions. 1) What is "arduino"? Is it a microcontroller with a few added goodies? 2) Should I start there, or would it be cheaper(or better learning experience, or possible) to start of scratch and get breadboards and a microcontroller and other goodies myself? 3) Lets say I had an analog sensor(accelerometer), how do I store it's output? Is it best to convert to digital, and even then how does one store/output the results? 4) With an analog signal does it lose quality from travelling over longish wires? Or is there no risk there(I might not need to store the output from sensor if I can have it go through a wire to a servo.