 | Capacitors
 Learn how to identify and use various types of capcitor. This article explains the capacitor colour and number codes. |
 |  | Diodes
 Find out what diodes are used for in electronics and the types of diode that are available. |
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 | Light Emitting Diodes (LEDs)
 LEDs are available in many shapes, sizes, and colours. This article explains the advantages of using them rather than lamps in your models. |
 |  | Reed Switches
 James Johnston explains the advantages and disadvantages of using reed switches. |
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 | Relays
 Find out how relays work and learn about the latching relay circuit. |
 |  | Resistors
 Discover Ohm's Law and learn how to interpret the mysterious resistor colour code. |
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 | Transformers
 John Hewes looks at the characteristics of transformers and their varied uses in electronics. |
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