An Open-Source platform to create digital devices and interactive objects that sense and control physical devices.
Arduino Starter Kit Competition INDEX:
Project Book - 09 Motorised Pinwheel
This simple project used the motor to spin a cardboard design stuck to an old CD. The circuit consisted of a simple MOSFET driver to power the motor via an external 9v battery.
Summary of Project 09 - Motorised Pinwheel
This project shows another way that the Arduino can interface to the outside world via electric motors and introduces the concept of controlling a larger load current using a MOSFET. I used hot melt glue to attach the CD to the supplied hub - unfortunately I didn't align it perfectly and there is a lot of vibration when the motor runs. NB: if running through the Project Book then don't disassemble as the next project builds on this one !
Project Book - 10 Zoetrope
A Zoetrope is a device that makes a series of still images appear to move. I was really interested to see this when I initially scanned through the project book; and now I've been able to make it. The circuit is slightly more complicated than others in the book and the sketch is a bit longer than most....but nothing too taxing if you take time and worth making as it is a good Arduino and basic science project. I'm also sure it would rank quite well as a Science Fair entry. The project makes use of an H-Bridge controller Integrated Circuit (IC) to control direction and it pulses the enable pin of that IC on and off very quickly using PWM to control the motor's speed.
Summary of Project 10 - Zoetrope
I had an issue again with components pinging out of the breadboard, hence the wiring to the push switches being different to that in the project book (if you are following). I also could not initially work out how the image should be mounted into the slotted outer ring - but soon worked it out. The circuit works nicely and as expected. The motor is low power and, at minimal duty cycles of the PWM, the torque is very low and sometime it needs a helping push. The project book also describes further project development by strobing an LED onto the image to allow better viewing in low light conditions.
So far, this is the project that I would like to expand on and/or build a more robust version of - I'm thinking something a bit Steampunk ?
[Next up in the Arduino Project Book - Crystal Ball, "create a crystal ball to tell your future" ]