Assembly step by step:
1. Install Resistors R1, R2, and R3 as shown in the PCB Board Layout using their color
codes to identify them.
Solder the resistors in place and trim the leads with the diagonal cutters.
2. Install Diodes D1, D2 making sure the white line on the diode matches the PCB Layout.
Solder the diodes in place and trim the leads.
3. Install capacitor C1 as shown on the PCB Layout. C1 can be placed in either way.
Solder C1 in place and trim the leads.
4. Install the red LED1 with the long lead towards the edge of the PCB and the short lead
towards the inside of the PCB. Fold the LED down flat to lie beside D1 with the tip of
the LED near the PCB edge.
Solder LED1 in place and trim the leads.
5. Install SCR1 with the plastic covered side facing the outside edge of the PCB and the
metal side facing the S1 connection point.
Fold SCR1 down so that the plastic part lies flat on the PCB with the top of the SCR at
the PCB edge.
Solder SCR1 in place and trim the leads.
6. Install the Piezo Buzzer with the + mark on top facing away from SCR1.
Adjust the Piezo Buzzer leads to fit into the PCB.
Solder the Piezo Buzzer leads in place and trim the leads.
7. Install the S1 N.O. Pushbutton Switch besides the Piezo Buzzer. S1 can be placed in
either way.
Solder S1 in place and trim the leads.
8. Locate the two lengths of wire.
Use the diagonal cutter or a pair of wire strippers to strip both wire ends.
Solder one end of both wires supplied to the remote switch S2.
The wires can go on either way.
Solder the other ends of the wires into the S2 position on the PCB.
The wires can go in either way.
9. Solder the red Battery Clip wire to the +5V point on the PCB (at D1).
Solder the black Battery Clip wire to the GND point on the PCB (C1 and SCR1 K junction).
10. Before connecting a 9 volt battery review your work as per the Assembly Check Out.
PCB Layout
Schematics
(copper traces as seen through the board);
C
