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Started by sixeight, October 26, 2019, 07:46:01 AM
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Quote from: wespac on November 20, 2019, 09:27:43 AMVC Mini installed in a Hammond 1455N1202 case...because it's what I had laying around. The board fits perfectly in the case, connectors fit flush on the sides.
Quote from: sixeight on January 08, 2020, 10:07:36 AMReceived the RGB displays from BuyDisplay today, but unfortunately they are common anode, so they do not work with the WS2811 chip. So they cannot be used on the VC-mini, which needs a display with a common kathode backlight.
Quote from: sixeight on January 09, 2020, 03:41:01 AMActually the displays are common cathode, even though the datasheet says they are common anode. Yet they need a high level to work:
Quote from: sixeight on January 09, 2020, 09:00:04 AMTurns out the datasheet is correct. There are transistors on the PCB that control the backlight. So they are common anode and share the ground pin with control side of the display board.So it still does not work with WS2811 chip. Probably could pull off the transistors and connect them directly to get it to work...
Quote from: philjynx on January 09, 2020, 10:05:34 AMIs that one chip to 'colour' all the displays the same, or one chip per display?I dismantled a 1602 LCD a couple of days ago (the smoke had leaked out of the backlight diode - seems it didn't have a taste for 12 accidental volts). You could consider replacing the backlight diodes with the addressable type - bit of a chore but looks doable if you get small enough ones.I paid under £2 each for IIC 1602s for my controller (monochrome).
Quote from: philjynx on January 11, 2020, 02:10:56 PMI've always had difficulty remembering which end of a diode is which, till I read this "the symbol for a diode resembles a capital K" so this equates to the Kathode being where the K starts. I doubt I'll forget now. Perhaps that's why the backlight pads for a 1602 are marked A & K, Anode & Kathode.
Quote from: mooncaine on January 11, 2020, 08:14:25 PMIsn't one lead supposed to be longer than the other?