Some Common Tube pin outs:
IN-14
. Pins 2 and 13 are decimal points, and are often removed on the tubes. The other pins
are given below.
Pin
Connection
1
Anode
2
Right decimal point
3
Digit 1
4
Digit 2
5
Digit 3
6
Digit 4
7
Digit 5
8
Digit 6
9
Digit 7
10
Digit 8
11
Digit 9
12
Digit 0
13
Left decimal point
Notes:
•
It is best to carefully spread the legs of the tube out. If you have long enough leads, a
trick is to trim the leads to different lengths so they get shorter by 0.5mm as you go
round the tube. This means that pin 3 is shorter than pin 1 by 0.5mm. Pin 4 is shorter
than pin3 by 0.5mm and so on. Pin12 is shorter than pin 3 by 5mm at the end. This
means that you can thread the leads into the holes more easily.
•
To make the tube stand upright, solder just the first three leads at the beginning one at
a time (e.g. pin 1, pin6 and pin 10). You can then easily align the tube so that it is
perfectly upright by reheating only one of the pins. Once the tubes are upright and
aligned, you can solder the remaining pins.
•
If you don’t manage to mount the tube perfectly upright, small imperfections can be
compensated for in the mounting system. Try to avoid forcing the wires on the tubes to
bend slightly - tubes are robust, but they are made of glass and must be treated with
care.
12
