Photos, videos and docs of .:madworm:., with the keywords: "5050"

Almost looks like a little car

nobody@ipernity.com (.:madworm:.) — Sat, 26 Dec 2009 23:57:29 +0000

4 times the fun. I need a cheep source of these SMD RGB LEDs. I don't feel like buying a full reel yet.

SMD RGB LED - failure mode

nobody@ipernity.com (.:madworm:.) — Wed, 09 Dec 2009 18:42:14 +0000

They don't like the heat and just die. OK might have guessed something like that.

BUT they also suck in flux with all the dirt and just short out! WTF !! Now that I've killed 5 of these, I can only run one of the boards. I need to get more for replacement.

RGB LED Ring - LED test

nobody@ipernity.com (.:madworm:.) — Fri, 20 Nov 2009 00:50:45 +0000

.:madworm:. has posted:

Trying to figure out the right resistor values.

For 5V:

R: 1.75V -- 100Ω
G: 2.55V -- 90Ω
B: 2.60V -- 110Ω

RGB LED Ring - LED test

nobody@ipernity.com (.:madworm:.) — Fri, 20 Nov 2009 00:50:57 +0000

.:madworm:. has posted:

Trying to figure out the right resistor values.

For 5V:

R: 1.75V -- 100Ω
G: 2.55V -- 90Ω
B: 2.60V -- 110Ω

RGB LED Ring - LED test

nobody@ipernity.com (.:madworm:.) — Fri, 20 Nov 2009 00:50:53 +0000

.:madworm:. has posted:

Trying to figure out the right resistor values.

For 5V:

R: 1.75V -- 100Ω
G: 2.55V -- 90Ω
B: 2.60V -- 110Ω

RGB LED Ring - LED test

nobody@ipernity.com (.:madworm:.) — Fri, 20 Nov 2009 00:50:44 +0000

.:madworm:. has posted:

Trying to figure out the right resistor values.

For 5V:

R: 1.75V -- 100Ω
G: 2.55V -- 90Ω
B: 2.60V -- 110Ω

RGB LED Ring - 2nd prototype

nobody@ipernity.com (.:madworm:.) — Sat, 30 Jan 2010 15:21:16 +0000

.:madworm:. has posted:

I got 4 boards from BatchPCB again, only this time 2 of them had broken traces. Fortunately they can be fixed as shown.

This revision now supports auto reset and has a smaller spacing between the pads for the solder bridges. The next one will come with jumpers.

RGB LED Ring - V1.21

nobody@ipernity.com (.:madworm:.) — Wed, 03 Feb 2010 17:09:04 +0000

.:madworm:. has posted:

The next round in my prototyping game. I declare this board as the final version, more or less ;-)

Design files, code and documentation.

RGB LED Ring - V1.21 PCB

nobody@ipernity.com (.:madworm:.) — Wed, 03 Feb 2010 17:09:04 +0000

.:madworm:. has posted:

The next round in my prototyping game. I declare this board as the final version.

RGB LED Ring - Real PCBs

nobody@ipernity.com (.:madworm:.) — Wed, 09 Dec 2009 15:53:39 +0000

.:madworm:. has posted:

I finally got the PCBs from sparfun. It almost took 6 weeks. 9 days for the letter to get to me. I wonder what takes so much time for "air mail". Must have been my "dear friends" at the customs office again.

Unfortunately this is _not_ the updated design I sent them shortly after I had placed my order, so this PCB version doesn't support auto-reset :-( Let's hope the rest works.

RGB LED Ring - Real PCBs

nobody@ipernity.com (.:madworm:.) — Wed, 09 Dec 2009 15:53:39 +0000

.:madworm:. has posted:

RGB LED Ring - Real PCBs

nobody@ipernity.com (.:madworm:.) — Wed, 09 Dec 2009 11:10:04 +0000

.:madworm:. has posted:

RGB LED Ring - assembled

nobody@ipernity.com (.:madworm:.) — Wed, 09 Dec 2009 18:42:14 +0000

.:madworm:. has posted:

RGB LED Ring - Real PCBs

nobody@ipernity.com (.:madworm:.) — Wed, 09 Dec 2009 11:10:35 +0000

.:madworm:. has posted:

RGB LED Ring - Real PCBs

nobody@ipernity.com (.:madworm:.) — Wed, 09 Dec 2009 11:10:25 +0000

.:madworm:. has posted:

RGB LED Ring - A BatchPCB test

nobody@ipernity.com (.:madworm:.) — Sun, 01 Nov 2009 03:39:10 +0000

.:madworm:. has posted:

Top side.

This is revision 1.21

It is now equipped with an optional (jumper) ultra low drop voltage regulator and can run from either regulated 5V DC or from up to 14V DC (no spikes please). The input voltage is limited by the regulator's decoupling caps. I could only get 16V tantalum types in 1206. It also now supports auto-reset for even easier code updating.

With the onboard regulator it can conveniently be powered by say a 9V block or 4 AA batteries.

Pimped tail lights

nobody@ipernity.com (.:madworm:.) — Sat, 19 Dec 2009 20:19:31 +0000

.:madworm:. has posted:

2x RGB LED Ring, 2x AA, 1x MAX756, 1x 1N5817, 1x 22µH 3A, 1x 220µF, 2x 47µF, 1x 100nF and lots of patience.

No test drive yet. It has snowed a lot and it feels like -20°C outside. My fingers almost fell off.

And the best thing, as usual, it works with the Arduino IDE. Just pull off the cpu modules and reprogram them as you like. A 6pin FTDI compatible header is on their backsides. There's also an ICSP header, but that can only be used once to program a bootloader. After that MOSI/MISO/SCK are used for the LEDs (whole PORTB of the chip). The backplane provides power (5V) and a common bus consisting of 2 GPIO pins and of course the I2C lines. In this case I use one line for a trivial syncing routine. The boards run with the internal oscillator and that seems to vary quite a low between these two chips. Without syncing after each run, there would be significant dephasing.

Now I should really get some mudguards. Getting a wet but is one thing, but deliberately exposing hand-made electronics to a mixture of salty, dirty and half molten snow is unheard of.

Improvised mudguard

nobody@ipernity.com (.:madworm:.) — Sun, 20 Dec 2009 18:43:52 +0000

.:madworm:. has posted:

Plastic bags have many applications, just like rubber bands.

After taking off the bag again, the rubber bands holding it in place just vanished! I've searched every pocket in my jacket, the floor, you name it. A rubber band eating 'thing' is down there.