tdaede / td-crt Goto Github PK

It would be nice if you generated a PDF of the schematics when you upload the project. That would make it easy for people to look at without the hassle of KiCad. I am curios to take a look at your design, I have been working on driving electrostatic CRTs for vector clocks with modern HV MOSFETs and switching power supplies.

Cool project! Have you considered supporting vector displays ?

Would it be possible to drive tubes such as vga monitor tubes or hd crt 1080i tubes with this board, given that suitable parts are used?

It's a tube used in Bang & Olufsen Beovision 1 consumer TV. It has no convergence rings and 6 pin yoke.

JVC’s curved bubble tube, the A68ADT25X01, was used for 10 years throughout their consumer TV lines.

The tube was used so long by JVC because of its great design. Even TVs from 20 years ago have no geometry issues and very minor focus issues. The quality is superb. At this point, it is easier to come across the tube than an actual D-Series TV, as prices continue to inflate.

So if it's possible to come up with an open source driver board for this CRT tube, it would certainly fill a niche for enthusiasts like myself.

Hi,
i have a perfect trinitron that i can "sacrifice" to test this project. How can i start with it? Is there a bom and pcbs?

Thanks!

I can't open the td-deflect.kicad_pcb with kicad 5.1.9 .

Hi, what about controlling the voltages for contrast and brightness by e.g. an 8ch I2C/SPI DAC?
Would have several advantages in my opinion:

• less effort for populating the PCB
• less footprint, smaller PCB
• could lead to better profiles for known CRTs
• all SW controllable (without disassembling the Monitor/TV for adjusting)
• cheaper (e.g. an DAC088S085 is around 2...4 USD) ?

The other resistors for voltage control could be handled this way too, or by a digital poti ?

Hello friend,

Great project, looking forward to the next developments, would love to use some of it in one of my TVs someday

I have a question. For the last year and a half i've been working on a Panasonic TC-14RM15L as a test bed for some modifications with the objective of creating a adequate and safe way to add RGB inputs to non European CRT TVs. There are ways to do it in older TVs that have the Jungle IC separated from the TV MCU, but most modern CRTs do not have this configuration.

One area that I'm having trouble is the HBlanking on this set, without correct color signal atenuation, lots of regularly timed transversal lines are visible on the screen. These lines seem to be the beam returning to draw the next line. The problem is that some devices, like the Sega Dreamcast, in specific video modes, will display these lines even with the needed atenuation. Looking at you schematics I supose that I need to pull each color signal low every blank interval and maybe these lines will disapear. I'm excited to try your solution (from what i could understand in the schematics), but I need to know if the 2N7002NXBKR is strictly necessary or one could use more acessible alternatives like the 2N7002L.

Thank you very much, good work!

is there a document tome for this project, beyond the source code itself?

Install, and adjustment tips?

Warnings, and gotchas?