Original GITHUB: https://github.com/zjuyzj/OPL2LPT-Replica

Bill of Material

ComponentDesignatorQuantityNote & Possible Sources

Leaded 100pF (101) MLCCC11Mouser 594-K101J15C0GF5UH5

Leaded 100nF (104) MLCCC21Mouser 594-K104K15X7RF5UL2

Leaded 10uF Pol. Cap.C3, C5, C63Mouser 667-ECA-1EM100

Leaded 2.2uF (225) MLCCC41Mouser 81-RDER71H225K2M1H3A

Leaded 3mm Green LEDD11Mouser 630-HLMP-Y801-JPP00

74HC04 CMOS InvertersIC11Mouser 595-CD74HC04E

Yamaha YM3014B DACIC21https://www.aliexpress.com/item/32611185781.html, DIP-8 socket is recommended

Yamaha YM3812 OPL2IC31https://www.aliexpress.com/item/32595976031.html, DIP-24 socket is recommended

LM358 Dual OP AmpIC41Mouser 595-LM358AP

Leaded Mini USB Type B ConnectorP11Mouser 571-2172034-1

D-Sub 25P R/A Male ConnectorP21Mouser 523-L717SDB25P1ACH3R

Header 2P 2.54mmP3, W12Mouser 855-M20-9990246

3F07 3.5mm Stereo Audio JackP41https://www.aliexpress.com/i/32478957056.html

1k 1/4W ResistorR1, R2, R33Mouser 279-YR1B1K0CC

10k WH148 PotentiometerR41https://www.aliexpress.com/item/32998649900.html

10k 1/4W ResistorR5, R62Mouser 279-YR1B10KCC

TSW DIP-6*6*11 KeyS11https://www.aliexpress.com/item/32725384168.html

Crystal HC-49S 3.58MHzY11Mouser 449-LFXTAL032257BULK

Notes for Assembling & Testing

• 5V DC power is needed, either from Mini-USB port or external power pins
• Try to press RST SW to apply a manual reset when YM3812 behaves abnormal
• Detailed parameters for components are noted on the board's silkscreen
• Crystal must be 3.58MHz for accurate pitch of notes
• Using 74LS04 to substitute 74HC04 for the Pierce oscillator is not recommended

Note: If the oscillator doesn't work, replace the two 1k ohms resistors around the 74HC04 IC with higher value resistors such as 4.7k ohms. Fine tuning for 100pF (101) MLCC capacitor around the 74HC04 may be also needed.