User Manual

2
11 Exciting projects which you can actually use.
Projects featured in this box:
LED with push button* ......................................................................... Light a LED when a pushbutton is pressed (pag.10)
A transistor as cuurent amplier* ........................................................................ Light a LED using a transistor (pag.12)
Astable multivibrator** ............................................................................................. Let LEDs ash alternately (pag.14)
Simple burglar alarm with LED indication and sound** ................................... Example of a simple burglar alarm (pag.16)
Light detector** .............................................................................. Switch on a LED when there is sucient light (pag.18)
Polarity tester* .............................................................................................................. Check battery polarity (pag.20)
Start-Stop circuit*** ..................................................................................... Control a LED using 2 pushbuttons (pag.22)
Timer circuit*** ................................................................................... Make a LED switch off after a certain time (pag.24)
Light switch*** ................................................................................. Make a LED switch on when it becomes dark (pag.26)
Water alarm** ............................................................................................... Make a liquid level trigger an alarm (pag.28)
Running light with 3 LEDs*** ............................................................... Make 3 LEDs light up shortly in succession (pag.30)