You can build a programmable current source with the LM317 adjustable voltage regulator -- there are many examples of doing this for LED drive out there. The LM134/234/334 are purpose built for the task. Thanks, Jonathan On Wed, May 24, 2017 at 3:19 PM, Ethan via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
no there is a new component that helps one avoid zener diodes and voltage
regulators. It was a "new" to me at least I had never seen one of these things before. Saves a lot of money and wiring
Buck boost converter type thing?
There are all sorts of drivers for LEDs now.
https://youtu.be/WsWwpR9TsjQ?t=8
LED strips are dirt cheap from China.
This is my 9' wide x 3' high RGB LED video wall currently sitting in my kitchen, uses 480 amps @ 5V worth of power supplies: https://www.youtube.com/watch?v=ReXP6luDKJw