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Engineering Development Tools

1pc MCP23017 IO Expansion Board I2C Interface Expands 2 Signal Pins as 16 I/O Pins Compatible with 3.3V and 5V Levels
Limited time offer, ends 11/01
$22.98
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1pc AD Keypad 16 4x4 Accessory board matrix buttons
Limited time offer, ends 11/01
$18.48
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![Adafruit Premium Female/Male 'Extension' Jumper Wires - 20 x 6" [ADA1954] Adafruit Premium Female/Male 'Extension' Jumper Wires - 20 x 6" [ADA1954]](https://c1.neweggimages.com/productimage/nb300/A7AND200918H5CTM.jpg)