There are many ultrasonic ranger module on the market, but sometimes, these kind of sensor needs to work in conditions more than the Lab. This water proof ultrasonic sensor meets this requirement. It has a good performance and almost the same usage of HC-S04 module.
This TFT LCD is designed for RPI, you can design it for many other things. It is play and plug, very easy and good item for your raspberry pi project and just simple connect to Raspberry Pi, you can start you Raspberry pi experience.
The Screw Shield extends all pins of the Arduino out to 3.5mm pitch screw terminals. It also has a lot of the utility provided by Arduino Protoshield, including: a large prototyping space of both connected and unconnected 0.1" spaced through-holes, a couple 5V and GND busses, a reset button, and a 5mm green LED.
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