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Old 27th Mar 2021, 1:45 pm   #3
rambo1152's Avatar
Join Date: May 2010
Location: Manchester, UK.
Posts: 2,674
Default Re: Modulator for 405 Line from PC?

I use an ATI Radeon HD 2400 XT graphics card (about 10 on Ebay) and this modulator

Hopefully that will look less intimidating as a project, and you could tackle the sound and vision parts separately if you want.

No expensive crystals to buy and no frequency synthesis, just a pair of free running oscillators, but it is quite stable enough, picture and sound are excellent.

I didn't bother with a custom PCB I just used perforated project board.
The chips are still available from Littlediode.

Last edited by rambo1152; 27th Mar 2021 at 2:00 pm.
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