Programmable resistor, which can replace the sliding rheostat. The resistance value can be programmed at will, making it a good helper for your experiment. This adjustable resistor is composed of 8 different order levels of resistance chain units in series. The 8 orders of magnitude are: x0.1Ω, x1Ω, x10Ω, x100Ω, x1kΩ, x10kΩ, x100kΩ, x1MΩ. Each order of magnitude can be configured by a jumper cap with a coefficient of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. The total resistance value Rxy of the resistor module is equal to the sum of the resistance values of each order of magnitude. This adjustable resistor is suitable for various occasions that require variable resistors, such as: amplifier circuit configuration, DCDC power supply feedback resistor configuration, bridge circuit testing, and other weak current application scenarios. The product is exquisite, small and convenient for experiments. Plug and play, no need to change experimental instruments back and forth. 1. Single resistor power: 0.1W 2. Single resistor accuracy: ±1% (partial ±0.5%) 3. Single resistor temperature coefficient: ±400PPM/°C (most of the accuracy is above ±200PPM/C) 4. Output range: 0.1R-9999999.9R Function description: 1. Replace low-power sliding rheostat 2. Switching power supply DEMO board, feedback resistor debugging 3. Op amp debugging, matching the required resistance value Special attention: 1. When using this module, please use it with a multimeter, and get the expected resistance value by short-circuiting the jumper cap (because there are errors in resistors, it does not mean that the resistance is how much the jumper cap is placed, so it is necessary to use a multimeter) 2. Because large resistors have errors, the 0.1R gear is generally only used to fine-tune the resistance. Colour:Black&Yellow Material:Plastic + Metal Package Contents: 1 x Programmable resistor Only the above package content, other products are not included. Note: Light reflection and different displays may