ZKit-51 Analog I/O Board
The ZKit-51 Analog I/O Board provides A-to-D and D-to-A capabilities to the main board. The board is based on NXP PCF8591 8-bit A/D and D/A converter, with four analog inputs, one analog output and a serial I2C interface.
The ZKit-51 Analog I/O Board offers the following features
PCF8591 ADC/DAC chip.
ADC with 4 channels, 8-bit, max. 11kHz sampling rate.
2 ADC channels connected to POT.
2 ADC channels terminated in Phonix header.
DAC with single channel, 8-bit, max. 11kHz conversion rate.
DAC channel terminated in Phonix header.
This sample demonstrates ADC interfacing. When the program is executed, the voltage on ADC channel 1 is displayed on the LCD. When the POT connected to channel 1 is adjusted, the LCD is updated accordingly.