Album LED Square PT4115 from .:madworm:.

LED runway

nobody@ipernity.com (.:madworm:.) — Tue, 20 Nov 2012 09:44:35 +0000

Pushing up the daisies

nobody@ipernity.com (.:madworm:.) — Sat, 17 Nov 2012 21:03:26 +0000

DOH!

I don't remember having dropped or hit it hard. Let's blame it on material fatigue. I should've ordered 20. Now I'm one short ;-(

Interlinked

nobody@ipernity.com (.:madworm:.) — Fri, 16 Nov 2012 11:09:58 +0000

.:madworm:. has posted:

The voltage-drop across the chain of LED-boards is just 10mV. Therefore I conclude that there's enough copper ;-)

Variations of White

nobody@ipernity.com (.:madworm:.) — Thu, 15 Nov 2012 17:25:27 +0000

.:madworm:. has posted:

Same board, but different types of LEDs.

Tower of Power

nobody@ipernity.com (.:madworm:.) — Tue, 13 Nov 2012 21:20:20 +0000

.:madworm:. has posted:

PWM generator added

nobody@ipernity.com (.:madworm:.) — Tue, 13 Nov 2012 21:20:20 +0000

.:madworm:. has posted:

Works nicely - once the soft-start capacitor has been removed and a 10k pull-down resistor has been added.

Green on black

nobody@ipernity.com (.:madworm:.) — Sun, 11 Nov 2012 17:33:57 +0000

.:madworm:. has posted:

Triplet

nobody@ipernity.com (.:madworm:.) — Sun, 11 Nov 2012 13:21:04 +0000

.:madworm:. has posted:

Seems to work.

A bit lof light

nobody@ipernity.com (.:madworm:.) — Sun, 11 Nov 2012 03:44:58 +0000

.:madworm:. has posted:

The datasheet says 6V max on the DIM pin... just like on a 5V AVR chip. BUT there don't seem to be any protection diodes in the PT4115. I managed to kill two by accidentally bridging the DIM-pin to the VCC-pin. Not with a wire, but with a finger. Skin resistance was low enough to kill the chip ;-( I've added a 5V1 Zener and a 1k series resistor to the next version.

More Light

nobody@ipernity.com (.:madworm:.) — Sun, 11 Nov 2012 03:44:57 +0000

.:madworm:. has posted:

Gloomy

nobody@ipernity.com (.:madworm:.) — Sun, 11 Nov 2012 03:44:56 +0000

.:madworm:. has posted:

LED-Square PT4115 - I see a face again

nobody@ipernity.com (.:madworm:.) — Sun, 07 Oct 2012 15:46:52 +0000

.:madworm:. has posted:

There's a face, yes I can definitely see a face on the board.

LED-Square PT4115 - early proto

nobody@ipernity.com (.:madworm:.) — Sun, 07 Oct 2012 15:46:51 +0000

.:madworm:. has posted:

It is still missing a few important parts... power connector + labels, footprint for optional soft-start capacitor...

If you should have an idea what else to put on there, let me know. Keep in mind that these modules should be 'dumb' and there will be another board which is supposed to control them (PWM dimming, maybe IR receiver or PIR sensor).

The board is designed to run at 24V DC (or a bit less) and will draw about 100mA. Total light output should be 180lm. If the cooling via the copper pour is sufficient, I might increase the current a bit.

LED-Square - Halloween edition

nobody@ipernity.com (.:madworm:.) — Mon, 29 Oct 2012 20:47:41 +0000

.:madworm:. has posted:

This may be my first board that requires hot-air soldering or baking in a skillet and solder paste. I've extended the LED footprints to allow going in with a soldering iron, but I don't know how that will work out. The pads on the LED don't really extend to its edges, so conventional soldering may not work.

It's really sad that KiCad, as of now, doesn't allow for on-the-fly resizing of silkscreen artwork. You always have to go through the module editor, which requires resizing of the vector data using a custom external perl-script.

A pit!

nobody@ipernity.com (.:madworm:.) — Fri, 09 Nov 2012 16:51:57 +0000

.:madworm:. has posted:

If this track had to carry a lot of current I would have to worry about it, but only 100mA will pass through it.

Oops

nobody@ipernity.com (.:madworm:.) — Fri, 09 Nov 2012 16:51:57 +0000

.:madworm:. has posted:

Seems they found a problem and fixed it right away.

Oops

nobody@ipernity.com (.:madworm:.) — Fri, 09 Nov 2012 16:51:58 +0000

.:madworm:. has posted:

Seems they found a problem and fixed it right away.

Not etched all the way

nobody@ipernity.com (.:madworm:.) — Fri, 09 Nov 2012 16:51:59 +0000

.:madworm:. has posted:

In this case it's not detrimental.

Missing thermal via

nobody@ipernity.com (.:madworm:.) — Fri, 09 Nov 2012 16:51:59 +0000

.:madworm:. has posted:

Not a show stopper.

LED-Square - front

nobody@ipernity.com (.:madworm:.) — Fri, 09 Nov 2012 19:04:24 +0000

.:madworm:. has posted:

! I WANT MY PARTS !