I should have clarified better, i meant a diy sensor to measure air pressure, like the HX710B does. i was thinking of something like the coiled party whistles that unfurl when blown, but they don ...

In this project , he used components like the Arduino uno board, solar panel, LDR sensor and servo motor. He also used four LDR sensors in this project . LDR sensors recognise the intensity of ...

The sensor will be installed at the main power supply, which is conmected to 40 to 50 lights," he explains. He makes a device for Rs 3,200 and sells it for Rs 3,800. With this LDR system, villages ...