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Since the LED is so bright
Two features that really stand out about the MTK3339-based module is the external antenna functionality and the the built in data-logging capability
There is now an auto-reset circuit so that it will reset the display on power up
specifically chosen for its excellent resistance to lots of soldering and desoldering (essential for prototyping boards)
header strip
Protected GPIO Extender for Raspberry Pi Keypad Since the LED is soProtect all your GPIO pins with this board. It sits comfortably in between your Raspberry Pi and your project to provide protection from accidental shorts or voltage slips. Each GPIO is protected by a 330ohm resistor to limit excessive current, and a zener diode to sink any voltage up to 5v meaning it is safe enough to use 5v logic sensors quickly and easily with your Raspberry Pi. Perfect for teaching environments to help prolong the life of your
US$ 122.50
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