User manual

Wiring diagram

Component diagram

g) Light emitting diodes

Solder the six LEDs with its correct polarity onto the circuit board. The shortercon-

tact pin indicates the cathode.

Examining the light emitting diode 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 at-

tened edge that must match what is printed on the component diagram.

Install the contact pins by plugging them into the holes on the board and then solder.

The LEDs should be soldered into place at a distance of about 5 - 10 mm to the

circuit board; depending on the installation site of the board, the LEDs may also

be bent.

h) Integrated circuits (IC)

Finally, the three 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 cor-

responding marks on the IC (notch or dot).

IC2 and IC3 are highly delicate CMOS-ICs, and static electricity can ruin them. Only touch the

housing of the IC2 or IC3; 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 = NE 555, CA 555, TBD 0555 or LM 555 Timer IC (notch or dot must point to R1)

GND +UB

Trigger discharge

Output switching threshold

Reset control voltage

IC2 = CD 4017, HCF 4017 or MC 14017 decade counter (notch or dot must point away from

IC1)

Outputs

IC3 = CD 4049, HCF 4049 or MC 14049 6x inverter/buffer (notch or dot must point to P1)

i) Final check

Recheck the circuit prior to activation, whether all components are installed properly. 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.