RE: My 3rd big Halloween Project - an actual nightmare

Robert Peter Oakes — Wed, 28 Oct 2015 21:15:17 GMT

Do you want every one to be individually addressable ??, if so then neopixel (To Borrow an Adafruit brand name) will probably work best, if it is simply a few banks then perhaps a mosfet driver for each bank

Can you describe better what your trying to build, how its going to work ?, trying to wire up multiple shift register chips will become very tedious if were talking hundreds so a better approach should be thought of

looking forward to additional info

Peter

RE: My 3rd big Halloween Project - an actual nightmare

balearicdynamics — Wed, 28 Oct 2015 19:44:06 GMT

Shift registers is the right solution.

https://www.tindie.com/products/alicemirror/daisy-chained-shift-registers-board-arduino-kit/

This is a project initially done for Arduino but works also with the Raspberry PI. With this configuration it can support up to 32 different LEDs. In my opinion if you have really hundreds of LEDs to control easily you should approach a different way.

I suggest as alternative, the use of a NeopixelNeopixel RGB LEDs strip that at a reasonable cost gives you the option to control several meters of chained LEDs probably already ready to fit in your project.

An example of their usage, in this case with a ring is in the following Blog post: Meditech: Camera probe with PI camera As mentioned, in the bottom of this same post, [mention:ca2fe37c8c70477fb45e83ddaf152e5d:e9ed411860ed4f2ba0265705b8793d05] has published a very good tutorial on the use of the neopixel LEDs that can be found there: Sci Fi Your Pi: PiDesk - Guide: Controlling NeoPixels with the Raspberry Pi A+/B+

Enrico