Getting started

Current Release 20180719 0.7.03 OLED

To use the card

• Download the Arduino IDE.
• Add Arduino library https://github.com/maxint-rd/FastPwmPin
• Add Arduino library https://github.com/maxint-rd/mxUnifiedSN76489
• Connect the I2C to arduino
• Connect CLK-pin to arduino IO-pins (refer to FastPwmPinfor the pins).. Default is pin 3.
• Connect WE-pin to arduino IO-pins (refer to mxUnifiedSN76489 for the pins) Default is pin 4.
• Connect a headfone to the 3.55 output jack
• Open example SN76489_MmlMusic
• add line to setup() FastPwmPin::enablePwmPin(3, 4000000L, 50);
• Set I2C adress to 0x38 like this mxUnifiedPCF8574 unio = mxUnifiedPCF8574(0x38);
• Upload to arduino.
• Have fun!

The 4Mhz clock signal is created using FastPWM library.

TODO:

• Fix hiss on output sound
• Drop the library FastPwmPin
• Generate clock signal using 4 Mhz crystal + 2x Pf capacitors.