School project Kit 1 - Heat Alarm, Light sensor, Automatic Night Light

3 Projects in 1 box:

This kit contains the parts for 3 different projects. Perfect for the learning about electronics. The projects shows how Resistors, Transistors, LDR's. NTC's and LED's work. It teach the concept of series and paralelle resistors and how small signals can be ampliefied to do real life things.

Contents:

• 1 x Battery Box ( AAA )
• 2 x AAA Batteries
• 1 x Buzzer
• LDR
• NTC
• Small Breadboard
• Resistors
• Transistor
• LED's
• QR code to the instructions and circuit layout ( Needs an internet connection )

Project 1 - The Heat Alarm

A NTC thermistor, a transistor and an LED that lights up when things get too hot.

This circuit watches the temperature of one small sensor. While the sensor is cool, the LED stays dark. Warm it past about 48 °C and the LED switches on. That is the whole job — and it is exactly how the heat sensor in a real alarm panel starts out.

Project 2 - The Light Alarm

An LDR, a transistor and a buzzer that goes off the moment a light shines on it.

Hide this in a drawer, a box or a cupboard. While it sits in the dark it says nothing. Point a torch at the sensor and it sounds. It is the simplest kind of intruder alarm there is — and it is very nearly the same circuit as a heat alarm, with one part swapped.

Project 3 - The Night Lamp

Four parts. It notices when the light goes, and turns itself on.

Leave this on a shelf and forget about it. Through the day it does nothing. As the room dims towards evening the LED begins to glow, brighter as it gets darker, and in the morning it fades away again. Nobody switches it on or off.