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3.5. Assembly
Proceed according to the order given in the list below. First solder the components on the
solder side of the PCB and then cut the excess wires with the side cutter. Follow the
instructions on soldering in section 3.2.
Caution:
!
Several components have to be mounted according to their polarity. When soldering these
components the wrong way round, they can be damaged when you connect the power. In
the worst case the whole circuit can be damaged. At the best, a wrongly connected part will
not function.
1.
Resistors
2.
Wire bridges Br1 and
Br2
3.
Diodes, Zener diodes
4.
IC sockets
5.
Ceramic Capacitors
6.
Light emitting diodes
(LEDs)
7.
Transistors
8.
Electrolytic capacitors
9.
Terminal strips
10.
ICs in DIL-housing
Mounting orientation of no importance.
Use the off-cut wires of the resistors.
Observe the polarity!
The negative end of the diodes is marked with a ring. This is
shown in the PCB layout.
Mount the sockets that way, the markings on the sockets
show in the same direction as the markings on the PCB
board.
Mounting orientation of no importance.
Observe the polarity!
With wired LEDs the longer lead is always the anode
(positive pole).
Observe the polarity!
With transistors for a high power rating in TO packages (e.g.
BD types) the unlabelled back side is marked in the PCB
layout by a thick line.
Observe the polarity!
One of the two leads (the shorter one) is marked with a
minus sign.
Put together the terminal strips before mounting them.
Insert the ICs into the soldered socket.
Do not touch the ICs without first discharging yourself by
touching a radiator or other grounded metal parts.
Do not bend the "legs" when inserting them into the sockets.
Check that the markings on the PCB, the socket and the IC
show to the same direction.
GBM-1
Assembling the kit | 13
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