Compact Resistor Decode Case for Thumb Wheel Switch KM2 0-9 Digis
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Compact Resistor Decode Case for Thumb Wheel Switch KM2 0-9 Digis
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Model information
- Source
- Printables
- Category
- Computers
- License
- Creative Commons — Attribution — Noncommercial
A decade resistance box with adjustable range from 0 Ω to 99.9 MΩ in 1 digit increments.
The internal wiring is fairly compact, so careful soldering is recommended throughout the assembly process.
Regarding resistor accuracy: This design recommends 1% tolerance resistors, providing a good balance between cost and precision. While 5% resistors are cheaper and more common, they would noticeably reduce accuracy, whereas higher-precision resistors increase the overall cost significantly.
You will need:
8x Thumb wheel Switch KM2 0-9 Digital (buy decimal! Don't buy the BCD version): https://s.click.aliexpress.com/e/_c4pyLA8p (this is a pack of 10 or 20 units).
2x Banana Socket Female Jack 4mm: https://s.click.aliexpress.com/e/_c4XtwUXJ