Velleman К6600 - Manual (Page 9)

9
1. 1/4W resistors
2. Diodes. Check the polarity !
3. Zener
diodes. Check the polarity!
4. IC sockets
5. Capacitors
6. Trimpotentiometers
7. Transistor
8. PCB pin
9. Electrolytic capacitors. Check the polarity!
10. Mount the IC in its socket. Check the position of the notch!
Connection
General
• A choice can be made between 1, 2 or 3 tones by connecting
push-button switch SW1, push-button switch SW2 or push-button
switch SW3.
• A loudspeaker of at least 8ohm (or number of loudspeakers in
series) can be connected between the LS points.
Connection of battery as supply (Fig. 11):
• Connect three 1.5V batteries in series between the + and -
connection points.
Connection of transformer as supply (Fig. 12):
• Connect a transformer (perhaps the bell transformer) of between
6 and 9VAC to the points 6...9VAC.
Connecting a transformer and an backup battery supply (Fig. 13):
• Connect a transformer between points 6...9VAC, and a battery
between points + and -.