For the switch project this week, I created a circuit that is controlled with your mouth. The switch is mainly made up of two parts – a straw and a craft stick. Both of these parts have springs that are connected to wires, which are part of the LED circuit powered by 2 AA batteries. When the two springs touch, they complete the circuit and the LED turns on. The user controls the switch by blowing air on the straw, which pivots around a resistor perpendicular to the straw. As the straw rotates, the spring on the end touches the spring on the craft stick, which sets the switch to ON and completes the circuit. The straw can be blown back the other way to set the switch to OFF.
This week, I created an interface using a potentiometer and some LEDs. I wired 3 LEDs in parallel and connected each of them to a button. I put the potentiometer on analog pin ADC on the feather. When you press a button, the corresponding LED lights up. The POT can be used to control how fast or slow the LED flashes. I hooked up my hands-free switch to the circuit, which has a straw you have to blow on to turn on the switch. For me, the hands-free switch made the circuit so much harder to turn on. You have to constantly keep blowing on the straw to close the circuit, and sometimes, the springs bounce off each other and turn off the switch anyway. Nothing about the switch makes the project simpler, and it would be easier if the switch were scraped completely. However, when the switch does close/turn on, the circuit works fine.
https://www.youtube.com/watch?v=VkuD3r_HZbw