Game Gear Sound board
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
I have created a new sound board to fit the new Game Gear mainboard. This sound board is specifically designed to be compatible with the new mainboard, but it can also be used with the original SEGA Game Gear. One exciting feature of this sound board is the option to enable stereo speaker output, enhancing the audio experience.
The sound board I have developed utilizes the STMicroelectronics TDA2822 amplifier chip, which is the same chip used in the original SEGA sound board. The TDA2822 is a dual power amplifier, the circuit is specifically designed to amplify both speaker and headphone output. By incorporating this reliable and proven amplifier chip, the sound board ensures high-quality audio amplification for both speakers and headphones, delivering an enhanced gaming experience.
In case you like to make your own board, you can download the gerber, BOM and PNP files here. Keep in mind the project has a Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license.
You can also replace L1, L2, L3 with the original part SEGA used, this is a CMC from Taiyo Yuden with part number CM04RC02. However, this part is obsolete and therefor replaced by a modern one.