SCR Motor Speed Control made from salvaged parts

**Nick79** · Dec 27, 2018, 07:44 PM

Nice work. I am having a little trouble translating the solder "circuit" into a working diagram. Would you be able to post a circuit diagram with a list of components so I and others could build one too? Thanks so much - Nick

**pfredX1** · Dec 27, 2018, 10:01 PM

Originally Posted by Nick79

Nice work. I am having a little trouble translating the solder "circuit" into a working diagram. Would you be able to post a circuit diagram with a list of components so I and others could build one too? Thanks so much - Nick

Here is a schematic to a circuit that works fine and is easy to build http://i.imgur.com/GE3ZXqP.png
You want to get a "snubberless" triac for inductive loads like motors. I used a BTA24-600BW and a DB3 diac with the dimmer I built and it worked fine to speed control a 600W router here. This is what the circuit I built looks like https://i.imgur.com/M7WENhG.jpg
Quite frankly I wouldn't build the original posted circuit today unless I had a time machine and went back 40 years in it. Then it wouldn't be today though.