Shared Projects by n00b

Sega Dreamcast Racing Wheel De-Dead Zone Fix

For further information please visist: https://benryves.com/products/dedeadzone/ and https://circuit-board.de/ (German website)

A short explanation video from Ben Ryves can be found on YouTube:

small pcb that allows to connect buttons with the 3v GPIO pins of a Raspberry Pi (e.g. to trigger some special functions) and a 5v USB Encoder (e.g. https://www.amazon.com/-/de/dp/B06XCP8R5F/ref=sr_1_4?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&dchild=1&keywords=ZERO+DELAY+ENCODER&qid=1627218697&sr=8-4) at the same time

BOM:

• 2x diode 1N4005
• 2x relay G5V-2 5DC
• 2x 2pin screw terminal 3.5mm pitch
• 1x 10pin screw terminal 3.5mm pitch (or 5x 2pin screw terminals)

Rapid fire unit for the SEGA Master System with potentiometers

Case: www.thingiverse.com

For further instructions please vistit circuit-board.de (German website).

Mega Drive to CPC 2 Player Adapter

BOM: Mouser

For further instructions please vistit circuit-board.de (German website).

The PCB offers the option to connect a consolized NeoGeo MVS with impedance matching RGB and Sync signals to a regular TV.

If the CMVS is connected to a TV by using a SCART cable (e.g.) no additonal parts (capacitors, resistors) are needed inside the SCART plug.

If the 5V output of the PCB is connected to SCART pin 16 (RGB switching) an additional 180 ohm resitor is needed.

Jumper J1: The THS7374 has four SD-video filters (used for /CSYNC, R, G and B).

All four filters can be bypassed by using jumper J1. close J1: internal filters are NOT bypassed leave J1 open: internal filters are bypassed

It is not possible to set the four SD-video (THS7374) low pass filters individually!

Normally, you don’t need a LPF inside your MVS output. There are just a few capture cards out there who don’t have a anti aliasing filter for is ADC inputs. There you have to have the LPF turned on.

On analog devices a LPF is not needed. On professional upscaling solutions like the Framemeister and OSSC you have an anti aliasing filter prior to its ADC circuits. This means you can leave the filters of the THS7374 off, too.

The picture looks great! :)