I was using a piece of foam rubber under my Arduino for the Marble Roller project. Not so nice, right?
Having a brand new MakerBot Replicator 2 on my desk, I decided to, well, make a nice bumper (or 3).
No design time needed as someone else did the hard work: http://www.thingiverse.com/thing:26237
Printed out wonderfully. Fits perfectly.
Today we devised a way to (hopefully) raise the marbles from the bottom of the track to the top using a servo motor. It is rather obvious at this point that we did not plan our initial track high enough and the end of it is too low. Oh well, version 1 is usually that way, right?
Here is an update to the marble roller project. We are using foam board and hot glue for construction. This is a surprisingly strong construction method for prototyping and projects like this.
In the foreground is a new stepper motor. Not sure if we will be using it or not for this project yet.
I got a cool little 4-wire bipolar stepper motor and wanted to drive it via Arduino.
I based the design on this reference:
http://arduino.cc/en/Reference/StepperBipolarCircuit (credit for following image belongs there as well)
Here is how it looks for real. Kind of a mess of wires, but you know what? It works great.
The kids and I are building a Arduino powered marble roller. It is a “demo” project for us to learn how to use servos, steppers, input, output, lights, transistors, h-bridges, and so on and so forth.
Hot-glue and foam-board are a great prototyping material!
Well, the fun is increasing with Arduino. We hooked up some circuitry which enables a transistor to switch a fairly large 12V load via a very small 5V digital pin on the Arduino board.
This has been a great learning resource: http://www.kpsec.freeuk.com/trancirc.htm
Basically, we have 12V power going through a motor circuit (protected by a signal diode), and then to the collector of a transistor. The emitter of the transister is connected to ground.
Lastly, the Arduino ground is joined with the emitter, and the transistor is switched by a 5V digital output pin on the Arduino board.
Now, just need to find something useful to do!
Ok, so if you haven’t heard about it, Arduino is a really cool piece of “open source hardware”. In simple terms, it is a single board computer with a number of analog and digital inputs and outputs, that can be programmed from your computer, but run independently.
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It’s intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.
I recently got this starter kit from Amazon.com:
And have since been playing with making different circuits, etc… It has been a good experience in working with lower level electronics (ohm’s law, etc…)
Hope to post more soon!