Elecrow

US$69.93
This ultra-high-density 64x64 RGB LED Matrix has 4096 bright RGB LEDs arranged in a 64x64 grid at a 2.5mm pitch. The luminance induction can be automatically adjusted, and the adjustable level is 16. These panels are typically used to make video walls.
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US$27.99
The Ethernet Shield connects your Arduino device to the internet in mere minutes. Just plug this module onto your Arduino board, connect it to your network with an RJ45 cable (not included) and follow a few simple instructions to start controlling your world through the internet. The Ethernet controller of this Ethernet Shield is W5200. it is twice the buffer size of W5100 and support for up to eight simultaneous TCP/UDP connections. There is an onboard micro-SD card slot, which can be used to store files for serving over the network. Thanks to a lowered RJ45 pot, you can flexibly add most shields on top of this Ethernet Shield.
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US$16.79
The RFM69HCW is an inexpensive and versatile radio module that operates in the unlicensed ISM (Industry, Science and Medicine) band, a set of frequencies set aside for low-power, short-range, license-free radios. It’s perfect for building inexpensive short-range wireless networks of sensors and actuators for home automation, citizen science and more.
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US$10.99
A strain gaugeis a device used to measure strain on an object. This strain gauge module uses the strain gauge BF350-3AA to detect the strain, with the amplifier and potentiometer on the board to adjust the measured results, users can easily get the result with any microcontroller such as Arduino.
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