Homebrew Magnetic Motor Starter

This is one of those things that I always wanted, and wanted to do besides. Well now I have it, and have done it too. I will share how I managed to do it with you in this article if you bear with me for a bit.

Step 1 My Motivation

When I got this saw it had no motor or switch. I put a motor on it and rigged up a switch using a scrap circuit breaker. That setup was hardly ideal but I said to myself while I was doing it this is temporary, all the while also thinking is this going to be temporarily permanent? We all know how those temporary things can go don't we?

I used that switch and it worked, but every time I flipped it all I could hear in my head was my inner voice echoing, "this is temporary ..." Stuff like that can really throw me off my game let me tell you. I wanted my push button start and stop buttons!

Comments

[LaserDave]

Nifty idea. The description is mostly story (and fairly lengthy), maybe a tiny more focus on the topic and a little less life-story would turn your good instructable to a great one.

Good job.

[pfred2]

This article was featured so I suppose it meets this site's criteria. As rtarvin points out in their comment, "this a common Circuit used in commercial application.", so it isn't my nifty idea, just my build of it. I was surprised I couldn't find a suitable schematic online, which is what prompted me to post my article. Now I know there is a schematic online of this particular kind of contactor.

[raheen]

There is an error in your circuit diagram.
It should look like this for non-latching push-buttons.

[pfred2]

Thank you for the different schematic. Maybe you can explain to me what the advantage to your circuit is? Also why you say mine has an error. Because mine does in fact work fine here.

[rtarvin]

Don't know if you ever got your answer from raheen. But this a common Circuit used in commercial application. on his diagram is a 2 push button switch. when pushing the on button activates latching relay. if you look at the line between switch circuit and the out circuit to relays. cause a continuous Circuit unit broken by the off push button.

[UATradition]

I enjoyed this one. This is precisely the type of thing that I love spending weekends with my father doing in his shop. It seems he always finds little projects like this to make the "barn" better !! Looks good !

[rimar2000]

How a great work!

[pfred2]

Thank you. Liked that one did you? I've been like a little kid pressing the buttons. The this is temporary voice in my head he is gone now too! But now it says I must make something great on the machine.

[rimar2000]

If "Liked that one did you?" means "is it similar to one you did?" the answer is "no, I would not be able to make a thing like that." I am too lazy to learn electronics at my age. Simple things like a bridge rectifier or something like that, I am encouraged, but not much else.