tams
elektronik
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Booster-Link
Page 24
6. Assembling the Booster-Link
You can skip this part if you have purchased a ready-built module or
device.
Preparation
Put the sorted components in front of you on your workbench. The
separate electronic components have the following special features you
should take into account to prevent mistakes in assembling:
Resistors
Resistors reduce current. Their mounting orientation is of no
importance. The value of resistors for smaller power ratings
(under 5 W) is indicated through colour rings. Every colour
stands for another figure. The colour ring in brackets indicates
the tolerance of the resistor which here is of no importance.
Value
Colour rings
120
Ω
brown - red - brown (gold)
470
Ω
yellow - violet - brown (gold)
2,7 k
Ω
red – violet – red (gold)
3,3 k
Ω
orange - orange - red (gold)
47 k
Ω
yellow - violet - orange (gold)
330 k
Ω
orange - orange - yellow (gold)
Diodes
Diodes allow the current to pass through in one direction only
(forward direction), simultaneously the voltage is reduced by
0,3 to 0,8 V. Exceeding of the limit voltage always will destroy
the diode, and allow current to flow in the reverse direction.
The diode type is printed on the body.
Diodes must be mounted in a given direction. The negative
end is marked with a ring. This is shown in the PCB layout.