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Double Oops!

A project log for ESPLux - Smarts for your downlights

A circuit you can place inline with your existing low voltage lights to allow for wireless control

mattMatt 05/04/2015 at 11:150 Comments

Don't look, my noobness is showing!

I just got my switching breakout boards! It seems as though, however, I read the wrong webpages. I read that I don't really need a pulldown resistor for this kind of MOSFET. Seems as though I should have trusted my gut and thrown one in. Not to worry, I soldered a little 0603 resistor between the two logic pins and that did the trick. Ideally I think it should probably be between R1 and the MOSFET, but this is life. I will update the board soon with the appropriate changes in case anyone wants to use it for some reason.

My second oops was similarly small, this time I don't have an internet to blame. I put my LED footprint in back to front. After two or three lost tiny little LEDs, I resoldered one in the correct polarity and it all works! Hooray!

I guess also this is the point of making up these separate boards, it helps weed out these problems before they get hidden in a bigger board. I know all you EE's out there are pointing and laughing at how small each of my demo boards are, but it is all a learning process for me.

One other thing that caught me a bit off guard, looks like my proto-pack got me more than i bargained for, I ended up with 22 copies of this board. Kinda slightly overkill for me, but hey, at least I have some spares.

Hopefully my power supply board turns up by the end of the week. It was shipped 3 days after the previous lot, so it shouldn't be too far away.

I'm getting a bit sick of boards floating around my desk. I think I'll cut up a bit of perspex or something to mount them all onto. A project for another day I'm afraid.

Here's the board in any case! (I probably should have waited until after I was off the phone so i had an extra hand to hold those screw terminals in place so they were straight... oh well)

Heres the setup so far, with the light dimmed (my camera is pretty terrible - sorry)

And here is my pulldown resistor bodge

Heres the album if you want to see more.

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