I2C DAC
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general info
Based on the MCP4726 chip from Microchip.
http://ww1.microchip.com/downloads/en/DeviceDoc/22272C.pdf
I2C address:
1100 000 and 1100 001 OR
1100 010 and 1100 011
physical dimensions
- Board outline: 25x25mm
- Mounting hole diameter: 3mm
- Mounting hole pitch: 19mm (3mm from board edge)
using the board
Set a voltage:
sudo i2cset -y 1 0x60 0x40 0xff 0xf0 i ^^ ^ < Voltage bits
explanation of the arguments:
-y don't ask confirmation 1 number of the I2C bus (0 on older raspberry pi's) 0x60 address of the DAC, use 0x61 for the other DAC. 0x40 configuration: normal. 0xff high 8 bits of the value 0xf0 lower four bits of the value (in the high nibble)