Kitronik Light Activated Switch Kit

The Kitronik Light Activated Switch Kit is a compact and educational electronics project that demonstrates how a light-sensitive circuit operates. This kit includes a printed circuit board (PCB) and all necessary components to build a functional light-activated switch, making it ideal for hobbyists, students, and electronics enthusiasts. The circuit uses a phototransistor to detect ambient light levels, and a pair of BC337 NPN transistors to drive the switching action, with a 47Kohm potentiometer allowing sensitivity adjustment and a 220ohm resistor for current limiting. All components are clearly listed and easy to assemble, providing a hands-on introduction to transistor circuits and light sensing technology.

The PCB ensures reliable connections and a neat layout, while the compact dimensions of the kit make it suitable for integration into larger projects or for standalone experiments. With a light weight of just 5 grams, it is lightweight and easy to handle, and the package includes all parts shown in the component list, so no additional components are required except for a suitable power supply and output device. This kit is perfect for classroom STEM activities, personal projects, or as an introduction to building sensor-based electronic devices. Whether you are learning about phototransistors or creating a simple automatic night light, this kit delivers an engaging and practical build experience.

Kit Contents

• 1 x 47Kohm potentiometer
• 2 x BC337 NPN transistors
• 1 x Phototransistor
• 1 x 220ohm resistor
• 1 x Light activated switch PCB