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Psykhaze

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Image Comments posted by Psykhaze

  1. 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 =)

  2. 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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