Construction
Preparation:
You should have a small tipped soldering iron, some thin (< 1mm, ideally 0.6mm) solder, and
electronic side cutters.
Components:
You should find the following contents as listed in the BOM (Bill of Materials). It is best to check
the contents before you start.
Please see the appendix to help you identify individual components.
Low Voltage Circuit:
Parts List:
D1
UF4007
C2
100nF
C3
220uF
C4
220uF
IC1
7805
R14
3k
LED1
LED3MM
SV1
CONN_POWER
CON1 BARREL JACK
The Low Voltage circuit is a very traditional voltage regulator using a linear regulator. It's job is
to reduce the external voltage from the power adapter down to a known and stable 5V to drive
the micro-controller and the K155ID1.
Put the parts on the board in the marked locations in the order they appear on the list.
Notes:
•
See the section on “Component Identification” for help with identifying the components.
•
D1 should be placed so that the white stripe on the body lines up with the white stripe
on the board.
•
C3 and C4 must go the right way round. The negative side is marked with a stripe. (See
hint)
•
The LED must go with the right polarity. The side which has the shorter lead goes
nearest the crystal “Q2”. (See hint)
•
Put IC1 so that the metal tab lines up with the white stripe on the board. The metal side
faces to the
outside
of the board.
