Multi-Turn Indicating Dial Potentiometer Knob for 6.35mm Shaft Black 20mm The integrated ESP8266 is used

The integrated ESP8266 is used to control the relay

You may compute how much current is going through the conductor by reading the amount of current produced by the coil

Colour Red & Black Length 90 meter Insulation Type PVC Wire Gauge 22 AWG

and has good insulation properties

Tape Length 25 Meter Tape Width 1Inch (25mm) Type Double Coated/Sided Tape Color Clear PET Protective Film Color Red

Multi-Turn Indicating Dial Potentiometer Knob for 6.35mm Shaft Black 20mm The integrated ESP8266 is usedThe knob helps to variate the potentiometer smoothly and it can be used in various Applications. Inner Circle provides a firm grip between knob and potentiometer. 0 90 Turn Indicating Dial knobs with brass bushings, suitable for spindles with a diameter up to 6. 4mm. The knobs are grooved to accommodate control element mounting nuts. It is suitable for Bourns precision multi turn potentiometer. Specification Material Stainless Steel Shaft Diameter 6.