Making a set of Iron Man armor is on the wishlist of many cosplayers – it’s a big undertaking. If you don’t want to commit to the entire project though, you can focus on a couple of pieces such as the arc reactor or the hand repulsor. One or both of these features is fun to add to an everyday outfit. Instructables user Honus used Arduino to power a hand repulsor up and down and to move it to open a missile compartment. He’s written a detailed tutorial for beginners, but you should still possess basic soldering skills. Honus also details how to provide the sound and use a bend sensor specifically for the repulsor:
The bend sensor in this example is used as a trigger- once its output value reaches a certain level it causes the Arduino to run the specified code. You can change the threshold value to alter the point at which the sensor acts as a trigger. If you open the Arduino serial monitor window while the servo board is connected to your computer you can see when the bend sensor triggers. The bend sensor is set up using a voltage divider to provide an analog input value on input pin 1.