From: Alan Pearce <kiwiantipodean@googlemail.com>
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Date: Sun, 14 Mar 2021 05:12:37 -0700
Subject: Re: [PIC] 1 Controller and 18 Peripheral PICs
Thread-Topic: [PIC] 1 Controller and 18 Peripheral PICs
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On Sat, 13 Mar 2021 22:00:30 -0800
AK <00@case.edu> wrote:

> Have you considered a series of WS2801 or WS2811 serial controlled
> ICs, their PWM output connected to a simple amp to handle your higher
> current LEDs?
> These controllers are widely used, have built-in PWM control of 3
> LEDs each package, and can be strung in a serial series.  You can
> effectively control a large array of LEDs with a single
> microcontroller pin tied to the SPI peripheral output.
>=20

There is also a version that contains a fourth white LED to get better
white colours. Also there is a Microchip app note on driving these
using a CLC peripheral to generate the clock shaping needed for the
data transfer without taking up processing time on the PIC.

On the Microchip Forum someone has partly posted a project using a dual
core dsPIC33CH chip to drive these at continuous maximum clock speed
with enough processing power in the PIC to do moving images on a matrix
display.
--=20
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