As a part of the ongoing Arduino Cult Induction workshop series, this month we will be focusing on sound.

In particular I will be going over creating sound using the Arduino's built in Pulse Width Modulation (PWM) and Direct Digital Synthesis using resistive ladders. We will investigate using the Piezo element as both a simple speaker and an input trigger. We will review the Musical Instrument Digital Interface (MIDI) from a hardware and software perspective, and look at a couple of useful integrated

Wanna dorkboard but afraid of surface mount?

Brian Riley at Wulfden will sell you a stripped down dorkboard kit with the reset pullup resister and the programming jumper ALREADY SOLDERED! and for another 6 bucks you can build a nifty flashlight!

http://www.1strecon.org/TheShoppe/flashlight/index.shtml

Schematic for the flashlight kit.

In preparation for making PCBs, I've created some little one-sided PCBs in Eagle.

They are:

I am fairly new to robotics/autonomous vehicles. I have a quick question; maybe someone can answer for me. I have a little Hot Wheels RC car that I had gutted all the rc components off of; I am wanting to attach my dorkboard and control the speed and direction of the motors. I have a circuit design to produce a motor controller (H Bridge)( http://itp.nyu.edu/physcomp/Labs/DCMotorControl ), but I would like to control the speed of the motors (14mph is too fast). How will I combine motor and speed control in one circuit and then use the dorkboard to control them?