User manual

1.4 Transistor
In this work step the transistor is set according to the imprint on the printed circuit
board and is soldered on the soldering side. Please make a note of the position:
The outlines of the casing must match those given on the printed circuit board.
Orient yourself hereby to the flattened side of the transistor casing. The contact
pins may not cross in any case; furthermore, the component should be soldered
with a gap of approx. 5 mm to the circuit board. Pay attention to a short soldering
time, so that the transistor is not destroyed through overheating.
T1 = BC 337
1.5 IC-sockets
Insert the sockets for the integrated circuits (ICs) in the corresponding positions
on the assembly side of the printed circuit board.
Caution!
Pay attention to the indentation or any other such marking on the front side of the
socket. This is the marking (connection 1) for the ICs that are to be used later.
The sockets must be inserted in such a way that this marking matches the
marking at the printed side of the board!
In order to prevent the sockets from falling out when the printed circuit board is
turned over (for soldering), every two pins of the socket lying diagonally opposite
to each other are bent and thereafter all the contact pins are soldered.
1 x socket 8-pin
1.6 Trimmer potentiometer
Solder now the trimmer potentiometer in the circuit and then insert the
accompanying full-floating axle.
R4 = 10 k
R5 = 10 k