Shared Projects by FrankStrasser

Untested. For adding cd sound back into the nomad for sega cd audio when using the mega sd cart. You dont need to, but I designed this to go on top of the 315 5684 audio chip and bend pins 10 and 24 up into the vias on the left and right. Flow solder from the via to pin 1 on the chip. Or you can place the chip elsewhere and run wires to it. Use 0402 package resistors and caps.

Same as my sega bypass version 2 just has holes and pads for a switch for fm audio switch for master system 2 or perhaps a region mod switch for that or genesis. Order .8 for best fit and make sure to remove r71 on bottom of genesis or r29 on master system 2 if using retrovision cables. I also have a master system 1 version available separate from this one.

Order .8 mil for best fit. The second version of my genesis rgb bypass board now no need for a jumper for hd retrovision cables but if using them you need to remove resistor r 71 from bottom of board near the multiout connector. If using mono audio and hd retrovision cables its possible to have a 3 wire install just fill holes ma and cv along with 5v(that one always gets filled 5volts). To use csync only fill 5v and ma if mono audio or only 5v and wire sl sr if using stereo audio from the headphone jack. or you can fill cv and wire csync if you plan on changing from hd retrovision to scart at some point.

Rgb and video bypass for the original white pc engine and tg16 consoles. To be used with a genesis 2 scart cable unmodified with components inside. Uses an md90sm 9 pin mini din soldered on bottom of board. Uses a C&K SK-12F17-G7 switch if you want to add a switch for region mod also soldered on bottom. Also can use hd retrovision cables by pulling cv from middle pin of rf box. Components are as follows: Video Section: rgb row 1: 2.2k resistors. Sync row 1: 1.3 k resistor. Row 2 rgbs: 10k resistors. Row 3: .1uf capacitors. Filter resistor by jumper: 4.42k resistor. Bypass cap: .1 uf. Audio Section: first row resistors in middle of sl sr and cv pads: 2.2k. Above those the caps are left .1uf and right 10uf. First row components next to audio amp chip: 10uf. Next row above that resistors are 2.2k. Next row resistors above that are 10k. Next row resistors above that are 511ohm. Last 2 resistors before big caps are 10k. 2 Big caps are 47uf 10v tantalum caps 3528 package. All packages other than the big caps are 0603 sizes. voltages on the caps are 10v or higher. The video driver is a ths7374 and the audio amp is a lmv358idr.

Order .8 mil or it wont fit!!

Based on models by Voultar, Arcadetv, and DB Electronics with my own spin. To be soldered into the rf spot of a genesis model 1 or master system model 1 or 2 rf spot. Solder capacitor legs through the bottom of the genesis or master system board and through the holes of my board to securely anchor it down. Use front holes(closest to din connector) for genesis and master system 2, back holes for master system 1. Uses a 9 pin din for compatibily with add ons(32x, Sega Cd) and stereo inputs. Also has Hd Retrovision compatibility via a jumper on board. Switch Version uses a S&K OS103011MA7QP1 single pull triple throw slide switch for wiring up fm audio mod