When my ultrasound sensor stopped working, I decided to improvise by making an obstacle avoidance bot using IR sensors (cheaper too).
Project tutorial by Chandran N
Monitor the world's rivers and lakes through a collaborative cloud allowing you to monitor any body of water with a fleet of devices.
Project tutorial by Andrei Florian
Voltmeter can measure voltage up to 50VDC. It automatically calibrates when voltage of power supply is unstable.
Project tutorial by IoT_hobbyist
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