A pack of components to build 10 humidity sensors, ideal for class projects with students working in small groups. This general-purpose circuit detects changes in humidity and switches the LED on or off accordingly. The sensitivity of the circuit can be set by adjusting a potentiometer. * Pack contains: * 10x PCB * 10x BC548 transistor * 10x humidity sensor * 10x 1kΩ resistor * 10x 100Ω resistor * 10x 470Ω resistor * 10x standard LED * 10x 5kΩ potentiometer * 10x battery connector * Designed for use with a 6 to 9V supply * Supplied as a pack of 10 kits https://elecena.pl/product/27206331/rapid-humidity-sensor-kit-pack-of-10 2024-11-10 https://elecena.pl/product/27206331/rapid-humidity-sensor-kit-pack-of-10 2024-12-19 https://elecena.pl/product/27206331/rapid-humidity-sensor-kit-pack-of-10 2025-01-04 https://elecena.pl/product/27206331/rapid-humidity-sensor-kit-pack-of-10 2026-03-12