Submitted by chriscallahanuvm on Sat, 02/27/2016 - 7:28am Tool Concept Stage: Functional Prototype License: This work is licensed under a Creative Commons Attribution 4.0 International License. Description: This tool uses a modern light dimming switch to provide variable speed control of a motor (fan, pump, etc.) It turns out these dimmers use silicon controlled rectifiers (SCR's) which allow for very nice voltage control, and hence speed control in motors common to farm applications. More on SCR here: https://www.quora.com/What-is-the-difference-between-the-SCR-and-a-voltage-regulator.Add new comment Documentation Documentation Wiki: Bill of materials A good light dimmer switch from Lutron or similar. $20-60. Other tools needed to build this tool Basic wiring tools (stripper, screwdriver, etc.) Step-by-step build instructions Dimmer installation instructions from Lutron: http://www.lutron.com/en-US/Products/Pages/StandAloneControls/Dimmers-Sw... Take care to check the current rating on the switch compared to the load. The Lutron selection tool will help you select by load (Wattage): http://www.lutron.com/en-US/general/Pages/wpst/Wallbox-Product-Selection... Add new comment I like this tool up1 user has voted. I built (or modified) this tool up0 users have voted.
