Nice! Full color will make a very interesting display. See unexpectedmaker.com for 7 and 14 segment RGB displays. He also has a nice, 4 digit RGB clock for sale.
Higher current displays can be driven indirectly using the HT16K33. Just use a ULN2803 (and a 74HC04 on the input to invert) on the low side, and two TBD62783s on the high side, with common cathode displays. The inputs to the 74HC04 need pullups, and the inputs to the TBD, pulldowns. I figured it out finally after asking lots of questions and spending a week of time breadboarding. It's probably a five minute design project for an EE. On Tuesday, November 5, 2019 at 8:34:58 AM UTC-5, newxito wrote: > > Thanks for pointing out the HT16K33 issue with big displays! > > I’m currently designing a self-made 16 segment display. The limit of my 3D > printer is 250mm (9.8”) but I will start with 140 x 100mm (5.5”). First, > I wanted to use a HT16K33. After your comment, I thought to use some mosfet > to increase the current. But finally, I've decided to use an ATmega328p in > I2C slave mode and RGB 5050 LEDs. That needs a lot more current, but I > think it’s nice to have full color control. > > > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b8472d7d-16b9-4bdb-8fae-47cccf3fa6c3%40googlegroups.com.
