Member Since: January 22, 2013
Country: Croatia
To prolong the battery life. It is discussed above in the comments, check it.
The current will be very small. You can find exact number in datasheet, page 3.
You can get them from the Eagle file attached.
.22 means 0.22OHM or 220mOhm.
I'm pretty sure this is 5050
There are 27ohm resistors on feedback pins on this board. They regulate current output on 22mA on R/G/B channels. If you are using 5050 LED and 5V supply, you can void resistors on output pins.
After fabricating 200pcs of PCBs I have learnt that it needs. :( 22pF works perfect.
I want to run these at 12V with 3 LEDs connected to a single chip. I need 5V zener diode + filter cap as datasheet says to make chip work on 12v. What about R/G/B feedback pins: are resistors on them a must? If no resistors, current is not limited and I should be careful not to exceed max. output current? Should I connect them to ground or leave them float? Also, the LEDs. Can I connect them in series although datasheet says max. output is 7V? Will brightness be lower? I have seen some strips with three LEDs in series including current limiting resistors on them connected to a ws2801. How that works?!? Thanks :)
Could I DIY this with Arduino Duemilanove(FTDI chip)?
Does this crystal need external caps or I just need to connect ground pins to ground at PCB layout?
No public wish lists :(