English Amiga Board - View Single Post - Amiga RGB to S-Video + composite adaptor

narmi · 01 July 2007, 19:49

Thanks for the warm welcome. This is my first DIY hardware project that works

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I just cleaned up the schematic, be warned that it is a large image. This configuration is NTSC only. The AD724 can be configured for PAL by tying STND to ground, but it also requires a 4.43 MHz clock input at FIN. NTSC Amigas do output a 3.58 MHz clock which works for NTSC, but a PAL Amiga outputs a 3.55 MHz clock. You would need to multiply the 3.55 MHz clock by 5/4 or supply a seperate clock crystal for PAL operation.

01 July 2007, 19:49	#5
narmi Guru Meditation Error Join Date: Jun 2007 Location: Vancouver, Canada Posts: 92	Thanks for the warm welcome. This is my first DIY hardware project that works . I just cleaned up the schematic, be warned that it is a large image. This configuration is NTSC only. The AD724 can be configured for PAL by tying STND to ground, but it also requires a 4.43 MHz clock input at FIN. NTSC Amigas do output a 3.58 MHz clock which works for NTSC, but a PAL Amiga outputs a 3.55 MHz clock. You would need to multiply the 3.55 MHz clock by 5/4 or supply a seperate clock crystal for PAL operation.