LED Night Light Design Kit

Description

The colour changing LED on this kit turns on when it goes dark and stays on for a period of time. This makes a good night light and because the LED is only on for a small amount of time the batteries last much longer. There is an on board trimmer to set the light level at which the LED turns on and another trimmer to set how long the LED stays on for. The maximum duration is about 30 minutes. When set to 15 minutes and activated once a night the batteries will last two months.

The kit contains:

• 2 x 220 Kohm potentiometer
• 2 x 10 Mohm potentiometer
• 1 x 47 ohm resistor
• 2 x 10 Kohm resistors
• 2 x 1 Mohm resistors
• 1 x LDR (light dependent resistor)
• 1 x colour changing LED
• 1 x 47 0uF capacitor
• 4 x N channel FETs
• 1 x PP3 clip leads
• 1 x 3AA battery holder
• 1 x timed night light PCB
• Teacher notes
• Free use of the Edumi Education’s E-Learning portal and the modules designed for this kit (view [ilink url=”http://edumieducation.com/?page_id=1286″]E-Learning Portal[/ilink] for more details)