IO Expansion Shield V7.1 Connection Diagram

Sample Code

If the IO Expansion Shield is used for connection, the sentence "const int CS_PIN = 10;" should be

change to "const int CS_PIN = 4;" in the sample code. Because the SS pin in the SPI interface of the

shield connects to D4 internally.

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Dual Digital Pot(100K)

<https://www.dfrobot.com/wiki/index.php/Dual_Digital_Pot_(100K)_SKU:_DFR

0520>

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This example generates two triangular waves to demonstrate

the basic usage of dual digital pot.

Created 2017-8-31

By Henry Zhao <Henry.zhao@dfrobot.com>

GNU Lesser Genral Public License.

See <http://ww.gnu.org/licenses/> for details.

All above must be included in any redistribution.

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