Wednesday, March 26, 2014

Bite Size Question 17

Electronics:

1. A thyristor is normally used in an alarm system.

Describe, with the aid of sketches, how a thyristor is used in an alarm system. [4]

Bite Size Question 16

Electronics:

1. There are different types of sensors used in electronic circuits.

a) The Light Dependent Resistor (LDR) is a type of sensor. Describe how this sensor works. [2]

b) Another type of sensor is affected by heat. Name and sketch this electronic component. [2]

Bite Size Question 15

Electronics:

1. Switches are used to make or break an electronic circuit.

a) Name two different types of switches.

b) A transistor is also known as an 'automatic switch'. Explain, with sketches and annotations, how a transistor works.




Thursday, March 20, 2014

littleBits

'LittleBits is like Lego for the Ipad generation'. See the link below to know more about littleBits and what they can do.

http://littlebits.cc/about