1.This is the “resistance replacement box”, a low cost alternative solution, you can set flexible and fast resistance between 1R and 9999999R,1R step accuracy.

2.For educational experiments, electronic engineering design, or test clipping are excellent applications. 3.Design based on the resistor series theorem.
1/2 watt tolerance +/- 1% SMD resistors.
High quality FR4 fiberglass PCB.