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Image Comments posted by Psykhaze
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Huge !
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Wow , awesome work !
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The "issue" i was trying to mention for -pure reference- was the case of Large RGB (matrixed) setup with PWM control. Otherwise everything is fine with Shift Registers on mono/bi color LEDs (with or w/o Power driver),maybe excepted the "low" refresh rate (wich is quite enough to drive a 16x16 blm @some hertz, so that's not a real problem). it's -only- technical improvement thoughts for the talking fun =)
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On 02/02/2017 at 0:16 PM, latigid on said:
while keeping in the MIDIbox paradigm of ordinary shift register chips, one thought is to add PNP BJTs as "current sources" (moreso voltage sources due to constant current sinks on the cathodes). Any thoughts on this?
I agree on BJT/ MOSFETs thing . It's -in theory- better to keep the splitting between Power and Control (once again in theory , shift register first paradigm is long term support and easiness of use before everything)
The hybrid role that shift register play help to keep things simple , wich is kinda important in the DIY , with lowered BOM advantage etc. and it can be buffered with 74HC541 in case of huge config.
I am impressed by the huge load you managed to have on shift registers @Sauraen
However for example (individual) PWM is kind of hard to manage with shift registers,it's a bit sad. I saw about Maxim MAX6966 and MAX6960 as nice LED expanders, offering individual PWM Control.
But i still have to write a driver , the nicest part ahah x)
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No 74HC541 at all ? if yes your pinout should be pretty optimal regarding the huge CS!
Edit : seems not after looking the wiki but i see some NMOSFET , so everything is not under direct driving ? -
Nice remake of the SeqV4 - adafruit size ?
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Yea sure, was just a wondering. For reference here is current Lextronic Link : http://www.lextronic.fr/P19864-module-lpc1769-lpcxpresso-board.html
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He told previously about uploading problems with new forum.
By the way old galleries don't show photos anymore,at least by my side -
Great illustration of revision difference . Maybe a 'twisted' pin could fill the 1.27mm gap pinout difference ?
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Heavyweight B)
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btw are wood support on the photo euro "sized" ? maybe that's the angle but the bottom board seems to fit just?
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looks cool finished!
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A W E S O ME ! Just discovered that. Wow!
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SEQ-1-T.jpg
in Members Gallery
2Posted
Traveller-Seq V4 in case . Very nice build *thumb up*