An open headphone adapter for the WonderSwan.
| Reference | Value |
|---|---|
| AUDIO1 | Vertical HDMI male connector (1.6 mm board width) |
| CN1 | 3.5 mm headphone jack (5 pin, e.g. PJ-328A0-B) |
| U1 | BU9480f |
| U2 | TDA1308T |
| R1 | 10 kOhm dual potentiometer (through hole, e.g. Alps Alpine RK10J12E002L) |
| R2, R3, R4, R5 | 3.9 kOhm resistor (1206 SMD) |
| R6, R7 | 10 kOhm resistor (1206 SMD) |
| C1, C2 | 1 uF capacitor (1206 SMD) |
| C3, C5 | 22 uF capacitor (1206 SMD) |
| C4 | 100 nF capacitor (1206 SMD) |
| C6, C7 | 100 uF capacitor (1206 SMD) |
| C8 | 10 uF capacitor (1206 SMD) |
Use the files and/or schematics to build your own headphone adapter board at your own risk. This adapter works fine for me, but it's a simple hobby project, so there is no liability for errors in the schematics and/or board files. Use at your own risk.