Arm activation buttons

thingiverse

Hitsory These buttons I built for our son with Mild Cerebral palsy, to help him train using his left arm. Due to the cause of his condition and weakness in that arm, he hadn't used it in over four years before we adopted him. So, to get him to use his arm at least, and make a little progress, we have to practice regularly, so that hopefully in the future he will be able to use it more efficiently. For now, this setup helps to motivate him to activate his left arm. Function It works simply: you must push both buttons down to get a signal. The type of signal that should start is up to your discretion. I currently just added a beep signal but I have obtained a circuit from an old toy that blinks and cheers when activated, so that will be installed soon. build it You need 2 small micro switches, which you can easily find in any DIY electronics store. Please see the image below; each switch should measure about 6mm in height without legs. Then, you'll need some thin cables and a power supply like a battery. Solder required To create the two-hand command feature, that requires pushing both buttons to get the signal, simply connect the switches in series. You can think of it this way: You have a battery with + and - Connect one cable to the + side of the battery and then attach it to one leg of the first switch. From the same switch, continue to the next switch using another cable. Then, from the second switch, draw out a new wire leading to your chosen "signal sound" or "flashing LED," and ensure you connect it to that component's + side. The - side of that component or circuit connects directly to the battery's -minus side. Before connecting all the cables into place, be sure to test the circuit;) Print Settings Rafts: It doesn't matter. Resolution: High Infill: 25% Supports: Yes Notes: A bit more cleaning around where the switch goes down on the base would be a good idea. It is supposed to fit tightly;).