I am noob in raspberry pi and I am analyzing the possibility to control about 60 Leds separately.
I have found docs related with this and I have seen several options that, indeed, I am not sure any of them are valid.
I would like to detail the solution that may be more accurate and I would appreciate any advice in any of my large list of doubts. Thanks in advance.
1- Expansion Hats based on MCP23017 through I2C
a) Feeding Leds directly
a.1 32 I/O
https://thepihut.com/products/modmypi-m ... ansion-hat
https://www.robotshop.com/en/32-channel ... ry-pi.html
How many Watts could be provided by output? I guess the HAT are feeding independently and should be no problem in 1W per output (32 W total). ¿Someone has tried any of this HATs and know if this is possible?
a.2 16 I/O
https://www.diymore.cc/products/i2c-iic ... der-module
https://learn.adafruit.com/gpio-expande ... t/overview
How are they connected? Serial Ribbon similar to this picture?
https://raw.githubusercontent.com/souli ... Ribbon.JPG
b.1 With 16 relays
https://www.tme.eu/es/details/oky3016/m ... e/okystar/
I haven’t seen I2C specification. I haven’t seen any post where someone is using it. ¿someone has work with it? ¿Someone knows how to connect them?
b.2 With 8 Relays
http://linuxgizmos.com/stackable-raspbe ... aximum-io/
I guess 8 of them is so much to put all together one hat into other. ¿some one knows any option to interconnect them?
2- Drivers for Leds (MAX6969)
I have seen in several forum that should be used Leds drivers or resistors to feed LEDs. I have understood this micro could help but I don’t find any HAT with this micro or other solution to drive the LEDs feeding.
Have I misunderstood something? Is necessary this Led driver or a resistor should be better/enough ?
3- SUPER BRIGHT LED
a. With HAT limited power, if so
b. If 1 watt per output is available
http://www.produktinfo.conrad.com/daten ... _NMN00.pdf
c. Leds Strips. Cool but not an option, should be independent.
4- Auxiliary Elements
a. Perma-Proto Board
Something fast and easy to mount without PCBs?, something better?
b. Wiring LEDS
I was thinking in FTP (like UTP but flexible). Each can handle 7 leds/ not bad and cheap. With heat-shrink tube ¿Any better solution for an easy mounting?
Sorry for this long post. I would appreciate any help in the HW guidance.