© Jeds Peds
EOTS
Pag
e
10
LED’s
These perform like other diodes except that the glow when a current passes through them.
Their position on the PCB will be shown like this
The LED will also have a flat side.
Generally, the rule would be to match the two and most of the time that is what you will do.
However, to save you de soldering your
LED’s
I recommend testing them with a multi meter (set to
diode test mode) to be 100% sure you are connecting the positive side where it needs to be. On the
example above the positive feed goes into the round side.
I have come across
LED’s
orientated opposite to what I expected previously, after
installation…
so
this quick test is sensible and is one less thing to debug later on. Check
twice…solder
once.
Transistors
This kit comes with transistors
The body of the transistor is usually a small black
‘can’
with a flat on one side.
The shape on the PCB corresponds to the
‘can’
The transistor can be the one listed or any other suitable substitute with matching pin out. The
orientation of this part is crucial. The silkscreen layer indicates which way around it needs to be with
its transistor shaped outline, matching the transistors case. Solder this
very
carefully.
The same warning about heat when soldering diodes also applies to transistors. Take your time
not to overheat.
