Dust Sniper (quiet extractor system)

Step 14 Controls and wiring

Ok so here is where we end up with plenty of head scratching, checking, double checking, and re-checking again. Remember that this is mains voltage we are tinkering with so get some qualified help if you need it.

The control board is basically going to consist of:
a dumb plug socket (just a plain socket),
a control socket (what we plug the power tools into, if we want auto dust extraction)
A master on/off switch (this turns everything on or off)
A switch that toggles between on/off/auto one of the vacuums 
A switch that toggles between on/off/auto the other of the vacuums

Begin by making some real size sketches of how it might be on card and work from there. Of course, this control board would be a prime candidate for some laser etching. Anyway, preparing the board can be a classic woodworking task: we need to drill and chisel some holes that will fit our sockets, switches, and air inlets. Make sure to plan it all out carefully based on the switches you have acquired before setting mallet to chisel.    

At this stage I also added in a 16A trip switch (that I was given when a neighbour was replacing their consumer unit). The fuse in the plug should give protection anyway, but a little extra is nice. Once you have everything sorted, and tested carefully rout the cables and secure them so they are all neat and tidy.