This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

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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.

Gerber

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.

BOM

Designator	Value	Footprint	LCSC Part
C1	100uF	CASE_B2	C79109
C2	100uF	CASE_B2	C79109
C3	220uF	CASE_B2	C79111
C4	100nF	1206	C97946
C5	47uF	CASE_B2	C147768
C6	100nF	1206	C97946
C7	47uF	CASE_B2	C147768
C8	100nF	1206	C97946
CN1	292161-6	Plugin,P=2mm	C499123
CN2	292161-2	Plugin,P=2mm	C86484
CN3	292161-2	Plugin,P=2mm	C86484
IC1	TDA2822D	SOP8	C668663
J1	PJ-307A	PJ-307A	C2939174
L1	1000R@100MHz	1206	C142050
L2	1000R@100MHz	1206	C142050
L3	1000R@100MHz	1206	C142050
LF1	1K	SO6
R1	56K	1206	C137251
R2	56K	1206	C137251
R3	4R7	1206	C859161
R4	4R7	1206	C859161
R5	100R	1206	C137392
R6	100R	1206	C137392
SW1	SSSS811101	SMD	C109335
VR1	A103

 

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 However, this part is obsolete and therefor replaced by a modern one.