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5
Step 1: Solder in the fixed resistors.
Resistors reduce the flow of electric current and also change the voltage level at different parts of
the circuit. Their size is measured in Ohms (Ω) and usually in thousands of Ohms or Kilo Ohms – this
is usually just written as K e.g. 22K = 22 Kilo Ohms
Fixed resistor size is shown using colour code:
http://en.wikipedia.org/wiki/Electronic_color_code
The colour coding of all resistors used in the E18 board is shown below.
Fixed resistors have no polarity i.e. no positive or negative (+ or –) and so can be inserted either
way around.
Insert the resistors in their correct places either
way around as they don’t have a positive or
negative (+ or -).
The size of each resistor is marked on the board and their colour coding is as follows:
0 Ohm
– Black – Marked ‘LK’ on PCB
330 Ohm
– Orange, Orange, Brown, Gold
4.7K
– Yellow, Violet, Red, Gold
10K
– Brown, Black, Orange, Gold
22K
– Red, Red, Orange, Gold
100K
– Brown, Black, Yellow, Gold
NOTE:
Many instructional videos including how to solder the printed circuit board (PCB) and the
