Daily Archives: 12-May-2016

I recently had the need to be able to set precisely a non-standard resistance value in production. Historically, I have used potentiometers, mechanical or electronics. Potentiometers are undesirable in production because they tend to be expensive, unreliable, mechanical units require adjustment accessibility, and they can drift.

While I was researching options, I ran across an interesting approach that uses three resistors to realize any resistance from 10 Ω to 1 MΩ within 0.1 % using three resistors from a set of 70 standard resistance values plus short and open values. Continue reading →