e-radionica
Member Since: January 22, 2013
Country: Croatia
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To prolong the battery life. It is discussed above in the comments, check it.
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The current will be very small. You can find exact number in datasheet, page 3.
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You can get them from the Eagle file attached.
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.22 means 0.22OHM or 220mOhm.
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I'm pretty sure this is 5050
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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.
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After fabricating 200pcs of PCBs I have learnt that it needs. :( 22pF works perfect.
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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 :)
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Could I DIY this with Arduino Duemilanove(FTDI chip)?
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Does this crystal need external caps or I just need to connect ground pins to ground at PCB layout?
No public wish lists :(