Arduino noob here. I’m trying to make a system that will vibrate every 10 mins but code’s not working unless usb is plugged. So far we’ve tried using: bc547 transistor, NE555 timer, 3V battery and a vibration motor. I need it to be mobile and small as it will go into the pendant I’ve shared below.2yr ⋅ CheeseSlope21 ⋅ r/arduino
