LDR House

The LDR House 
Mr Andrew began on the next project for the teams, the ‘Lighthouse’, an LDR paper house in which the LED  lights switch on when the house is kept in the dark and automatically switches off,  when placed in a well lit area.  Mr Andrew went on to explain about circuits and how, even though most circuits are usually in a plastic case, this one would be in the paper case, which is the ‘house’.  He went on to explain all the components in the circuit: the battery clip which is the power source; the resistor which would slow down the current; the light-emitting diode (the LED) which gives off light; the transistor which basically is the amplifier; the light dependent resistor which limits the current like a resistor but only works according to the amount of light falling on it (this would enable the light to turn on and off according to the brightness/darkness; and if that was enough, there were the simple wires!  Mr Andrew explained that the red ones were  to be connected to the positive terminal of a battery and the black to the negative.  It WOULD be a problem if you messed that up!  These were all the components of the circuit. Imagine how many would be in a high-definition, widescreen television!  There were instructions distributed to each table and the excitement in the atmosphere doubled.  Eager hands reached for the papers and fingers curled around components.  Everyone was excited to start building!

This was not a competitive event, however we must commend the American Embassy School Team for being the first to complete the construction of LDR house. Well Done!!!

Ldr house activity from robongiers