Start with identifying
all the components and their position on the PCB. |
| |
| 
Fit R1 and R2, soldering in position. Next
insert IC1 making sure the IC is the correct way round,
the notch on the IC must be the same way as the notch
indicated on the PCB. Fit VR1, Cl and TR1, ensuring
that the tab on TR1 aligns with the tab indicated on
the PCB. Solder all components in position then trim
off excess component leads.
|
Bend the three
legs of the 22K potentiometer upwards and solder to
the track side of the PCB.
 |
.
 Connect
the negative (black) lead of the PP3 battery clip to the
negative (-) on the PCB and then connect the positive
lead (red) to the jack socket. From the wire supplied
cut a 6” length, connect one end to the jack socket
and the other to the positive (+) on the PCB. |
Using the remaining wire supplied make
the two connections between the PCB and the loud speaker.
After checking all components are
correctly positioned and soldered connect a battery
of between 4V and 12V to the battery clip and plug in
your key. Finally check the volume control and adjust
the tone preset to give the desired pitch.
|
CIRCUIT DIAGRAM
|
COMPONENT
LIST |
| R1 |
150 Ohms Brown Green Brown |
1 |
PCB |
| R2 |
100K Brown Black Yellow |
1 |
1/4" Jack Socket |
| C1 |
1nf Capacitor |
1 |
1/4" Jack Plug |
| VR1 |
1M Ohm Preset |
1 |
PP3 Battery Connector |
| VR2 |
22K Ohm Lin Potentiometer |
1 |
Length of wire |
| IC1 |
4047B Cmos IC |
|
|
| SP1 |
8 Ohm Speaker |
|
|
| TR1 |
BFY51 |
|
|
|
