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the minus (-) sign. That end must always be connected to
minus.
Diodes
Diodes allow current to flow in one direction only and have to
be placed in that direction. The characteristic for a diode is
the ring at one end. Place them as drawn in the PCB layout.
Transistors
Transistors are in fact power switches. They have three wires
and a flat part on the body. They also have to be placed in a
certain direction. The PCB layout will help you to place the
transistor. In the layout, the flat part of the transistor is shown.
ICs
The notch on the IC shows the mounting orientation. The PCB
layout shows this marking.
Voltage regulator
Voltage regulators are ICs in a transistor housing. They
transform a varying uncontrolled input voltage into a
unvarying output voltage.
Terminal strips
Terminal strips are solder-in screw-type terminals. They provide a
solder-free and safe connection of the cables to the circuit.
Assembling the kit
Start the assembly with the resistors. First solder the components on
the solder side of the PCB and then cut the excess wires with the side
cutter, as short as possible. Insert the wire bridges Br1 to Br7. Use the
off-cut wires of the resistors.
Continue the assembly with the diodes. Then insert and solder in the
IC-sockets for IC1 to IC3. The ICs must be mounted according to the
marking on the PCB.