DIY Video Guide By Jiajer Ho Download PDF Drilling Guide: https://goo.gl/A6NW9R Material List: 2K Ohm Resistor http://amzn.to/2tXrFVk Potentiometer Knob: http://amzn.to/2eM2Dqb 5K Ohm Potentiometer http://amzn.to/2uuI07h 12V LED Latching Switch http://amzn.to/2vGokfi XL4015 Step-Down Voltage Regulator http://amzn.to/2h1eQrJ Electrical Tape http://amzn.to/2uv3Qrs 12 Volt 5 Amp Power Supply http://amzn.to/2uUx2Jo 100 x 50 mm Project Box http://amzn.to/2eLzXxN Equipment I use Hakko…