Discover this captivating soldering kit with an interactive twist. When someone comes close, the red LEDs will show a pulsating effect, like a beating heart. The kit contains a printed circuit board in the shape of a heart that can stand upright after assembly. You will solder 24 red LEDs and many other components onto this printed circuit board. The device with the heartbeat effect reacts to movement at a distance. How? The kit is equipped with an infrared lamp and an infrared receiver. As long as the infrared receiver detects the infrared light, the LEDs remain off. But as soon as the infrared light is interrupted, the LEDs start flashing. This kit is powered by a 9V battery (not included).