User manual
m) Integrated circuits (IC)
Finally, the two ICs are carefully inserted into the socket designed for this purpose.
Warning!
Integrated circuits are very sensitive to incorrect polarity! Therefore pay attention to
the corresponding marks on the IC (notch or dot).
The IC2 is a highly delicate CMOS-IC, and static electricity can ruin it. Only touch
the housing of the IC2, do not touch the terminals. You may never change integrated
circuits or plug them into the socket, while they are powered; this will ruin them.
IC1 = TL 071 (notch or dot must point to C6).
IC2 = CD4027, HCF4027 or MC14027 (notch or dot must point to R7).
n) Final check
Recheck the circuit, if all components are installed properly, prior to activation. Consider the
correct polarity of the various components!
On the soldered side on the circuit board, look for any circuit traces that may have been bridged
by solder residues, which in turn can cause short circuits and damage to components. Also
check whether cut wire ends have been left on the board. This too, can cause short circuits.
Most kits which have been returned for complaint handling showed poor soldering (disturbed
solder joints, wrong solder, etc.) and incorrectly assembled components.
Please note, that assemblies cannot be repaired or replaced, if acidic solder, soldering ux or
similar was used.
Wiring diagram
d) Condensers/capacitors
Insert the capacitor into the corresponding holes, bend the wires a bit apart, and solder them
to the traces.
Consider the correct polarity (+/-) of the electrolytic capacitors. Depending on the manufacturer,
the positive or the negative pole is marked with an appropriate symbol. The polarity is irrelevant
in regards to ceramic capacitors.
C1 = 0.01 μF = 10 nF = 103 ceramic capacitor
C2 = 1 μF electrolytic capacitors
C3 = 0.1 μF = 100 nF = 104 ceramic capacitor
C4 = 1 μF electrolytic capacitor
C5 = 100 μF electrolytic capacitor
C6 = 4,7 pF = 4p7 = 4.7 ceramic capacitor
e) IC sockets
Next, attach the two IC sockets to the board in the corresponding
position.
Warning!
Notice the notch or other mark on the socket: this is the
marker for ICs (pin terminal 1).
1 x 8-pin socket
1 x 16-pin socket
Prevent the socket from falling out by bending two diagonally opposite
pins of the socket. Now all the pins can be soldered. Make sure you are
not using too much solder; this leads to a short circuit between two pins.
f) Soldering pins (connector pin)
On the assembly side push the pins that will connect the microphone
(labelled “NF” and “-” on the board) with the help of a at or needle-nose
pliers into the corresponding holes on the circuit board. Then, the pins
are soldered on the side of the conductor trace.
g) Trimming potentiometer
In the course of this step the trimming potentiometer is installed and
soldered to the board.
P1 = 1 MΩ = 105
h) Light-emitting diode
Solder the LED with its correct polarity into the circuit. The shorter-
connecting leg indicates the cathode. Examining the light emitting di-
ode against the light shows the cathode on the larger electrode inside
the LED. The location of the cathode on the component diagram is
represented by a dash in the outline of the LED housing. The LED also
has a attened edge that must match what is printed on the component
diagram.
On assembling, the connecting pins of the LED are rst passed
through the small enclosed distance roll and then through the holes
in the circuit board.
LD1 = red Ø 5 mm
i) Terminal clamps
Put the terminal clamps on the corresponding positions on the circuit
board; solder the pins on side of the conductor trace.
1 x 2-pin terminal clamp
1 x 3-pin terminal clamp
j) Sliding switch
Insert the small sliding switch in the provided holeson the board (where
the outline of the switch is marked) and solder the terminals on the side
of the conductor trace.
S1 = sliding switch
k) Relay
Attach the relay to the circuit board and solder the terminalpins on the
side of the conductor trace.
RL1 = Relay
l) Microphone capsule
Solder the microphone capsule with its correct polarity to the solder pins
named “MIC”. The black line is minus/ -, the white line is plus/ +.
If the two lines are reversed, the clapper switch may only respond to a
very high adjusted sensitivity potentiometer.