tams elektronik 45-01015, Manual

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English RCD-1
Page 32
Value Colour rings
1,5 Ω brown - green – black - silver (brown)
220 Ω red - red - brown (gold)
820 Ω grey - red - brown (gold)
1 k Ω brown - black - red (gold)
10 k Ω brown - black - orange (gold)
33 k Ω orange - orange - orange (gold)
47 k Ω yellow - violet - orange (gold)
270 k Ω red - violet - gelb (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.
Light emitting diodes (LEDs)
When operated in the forward direction the LEDs light. They
are available in several different versions (differing in colour,
size, form, luminosity, maximum current, voltage limits). The
longer lead of wired LEDs is always the anode (positive pole).
Light emitting diodes should always be connected via a series
resistor which limits the current and prevents failure.