User manual

GBM-8 English
Page 29
6. Assembling the GBM-8
You can skip this part if you have purchased a ready-built module or a
complete unit.
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 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
1 kΩ brown - black - red (gold)
4,7 kΩ yellow - violet - red (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.