Velleman-Kit K1701 Manual De Instrucciones página 9

ASSEMBLY
Axial components are taped in the correct mounting sequence! Remove them from the tape one at a time.
The parts marked with (!) require special attention in the assembly instructions.
1. Mount the resisitors.
2. Mount the zener diodes. Watch the polarity!
3. Mount the capacitors.
4. Mount the electrolytic capacitors. Watch the polarity!
5. Mount the transistors.
6. Mount the LED. Watch the polarity! If one wishes to incorporate the PCB into our type B2646 casing, it is best to mount the LED
as shown in the figure.
7. Mount the trim potentiometer.
8. Mount the push-button
Connect the battery terminals with the "+"(red cable) and the "-" (black cable) leads.
If one has purchased the buzzer type SV4/12, it can be mounted at the location marked BUZ1. Be sure to check the polarity.
9. TESTING AND TUNING
Connect a 9V battery to the holder.
Stand at a location which is certain to have no mains cabling in the vicinity.
Turn the RV1 potentiometer completely to the left (counterclockwise).
Push on the button. Normally the LED should briefly light up.
Adjust RV1 so that the LED is just about dimmed.
The circuit is now adjusted and in its most sensitive position. If one wishes to decrease the circuit's sensitivity, one must turn the
potentiometer back to the left. The small PCB can be incorporated into the casing type B2646. However, one must then provide
an opening in the covering for the push-button and the LED (see fig.1.0). Anchor the PCB using two self tapping screws. Finally,
cover the push-button with the cap provided.
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