Black & Yellow Plastic Knob for 4mm D-Shaft Potentiometer (Pack of 5) automatic It is useful when you

It is useful when you need to connect two channels or to provide power supply

micro-inflating pumps

MAX7219 is a 4-in-1 display that may be used in a variety of ways

05-ohm resistor is connected to the power pin which is used to measure the current draw

or even 20

Black & Yellow Plastic Knob for 4mm D-Shaft Potentiometer (Pack of 5) automatic It is useful when youIt's a Black & Yellow Plastic Knob for 4mm D Shaft Potentiometer. 17mm Mini Black Plastic Knob with Yellow Pointer for Knurled Shaft Potentiometer with Plum Handle. Specification Material Plastic Shaft size 4mm Shaft Type D Type Knob Diameter 15mm Knob Height 17mm