January 11, 2013 AT 1:00 am

Variable Resistor with a Million Settings

variableresistorbox

Sam DeRose on Instructables writes:

Last week in my college physics lab we got to use these variable resistance ‘boxes’. They had two inputs and six dials, and could generate one million different resistances across the two inputs. I knew I had to have one, and why not make it myself? This tutorial demonstrates how to build one for yourself for pretty cheap.


Check out all the Circuit Playground Episodes! Our new kid’s show and subscribe!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground”Adafruit’s Apps!


Maker Business — The Essential Guide to Electronics in Shenzhen

Wearables — Lithium Batteries: a soft touch goes a long way

Electronics — Capacitor Polarity Markers

Biohacking — Can Gizmos Cure Insomnia? – The New Yorker

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



1 Comment

  1. But this will not actually give you 1,000,000 monotonically increasing values unless you use very high tolerance resistors — switching the high digits will have an error of many times the low digits.

Sorry, the comment form is closed at this time.