A hundred bucks doesn’t go as far as it used to, but if a side hustle can bring in an extra C-note per week, you’d be $5,200 richer at the end of the year — and that’s a nice chunk of change to invest ...

Arduino test code is run to see if the sensors are working properly, with built-in LED flashing when the sensor is triggered, and turning off when the sensor is released. The testing of the keys ...