J. Phil Thien's Projects

And another.

Here is another Picture.

I came across this forum and it inspired me to create my own automatic current sensing control instead of purchasing one.  I would like to thanks BrianHood for the inspiration and pointing me in the right direction. 

My setup is a little different.  I have a 240 V 3HP dust collector that I need to come on when I am using any of my power tools.  I used a Packard C340B 3 pole 40 Amp contactor to control the 240 V going to the dust collector.  I used a FRM01 Sain Smart 12v relay cycle timer module for the contactor control.  I placed the FRM01 relay in mode 10 and timer set to 5 seconds.  This will allow the dust collector to stay on for 5 seconds when I turn my saw off.   I also used the Hawkeye 800 current sensing relay that BrainHood and JohnWho suggested above.  I then added a manual switch and a 1ch 433Mhz wireless RF remote control switch to be able to turn the dust collector on and off at will. 

I have been using this design for the last couple of weeks and it has been working great without any issues.  It is nice not having to turn the dust collector on and off manually. 

All the parts above only ran me approximately $45.  They were all ordered off of ebay.  I also had some parts on hand.  Like the 12V 1 amp power supply, 2 amp circuit breaker and manual switch.  The housing and plugs cost as much as the components.  So in all I think I was around $100 for the whole set up.

I will place some pictures below once I figure out how to attach them.