voltages for contrast and brightness SW controlled? - Githubissues

tdaede / td-crt

tubes

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voltages for contrast and brightness SW controlled? #13

Open gcopoix opened 1 year ago

gcopoix commented 1 year ago

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 ?