Assembling The Kit - tams elektronik GBM-8 Manual

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6. Assembling the kit

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 in assembling:
Resistors
Resistors reduce current.
The value of resistors for smaller power ratings is indicated
through colour rings. Every colour stands for another
figure.
Carbon film resistors have 4 colour rings. The 4th ring
(given in brackets here) indicates the tolerance of the
resistor (gold = 5 %).
Value: Colour rings:
1 k brown - black - red (gold)
4,7 k yellow - violet - red (gold)
Diodes and Zener 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 package.
GBM-8
Page 12