Building an Arduino speed detector using IR technology to measure the speed of a moving object is much more cost-effective, ...

During our tests, it pushed our 500Mbps Internet connection all the way, even squeezing it up to 570Mbps at one point, and maintain that speed even in less accessible parts of our space.

As you can see it is very simple, it just has an ultrasonic sensor and a servo motor connected to the Arduino UNO, and the whole setup is powered by a 9V battery. You can make the connections as shown ...

Therefore, I developed an Open-source ESP32 project that uses an E-Ink display and a LED to show the indoor CO2 content. Take the small Sensor anywhere you go to monitor the Air Quality, with Battery ...

I ask professionals not to be upset, normal schematic diagrams will also be. Alternatively, you can use the ILI9341 display. If anyone need to have a display on/off button at hand, it can be connected ...