To use PCF8591 based yl-40 AD/DA shield with Arduino, the I2C bus address of the shield by default is 0x48. If DAC controller needs to be used, the control byte is 0x40.
Using PCF8591 based yl-40 AD/DA shield with Arduino
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To use PCF8591 based yl-40 AD/DA shield with Arduino, the I2C bus address of the shield by default is 0x48. If DAC controller needs to be used, the control byte is 0x40.
Amitabh Kant 
where is the code?
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Check out https://brainfyre.wordpress.com/2012/10/25/pcf8591-yl-40-ad-da-module-review/
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