SOLDER THE THYRISTORS
Solder the two thyristors into the board where it is
labeled Q2 and Q3. These are marked with the part
number 2N5061. Again make sure the device is the
correct way around. The shape of the device should
match the outline on the PCB.
4
SOLDER THE BUZZER
The buzzer should be soldered into the ‘buzzer’
terminal. The red wire must go to the ‘+’ terminal
and the black wire must go to the ‘-’ terminal.
6
ATTACH THE BATTERY CLIP
Now you must attach the battery clip. Start by feeding
the leads through the strain relief hole near U2. The
wire should be fed in from the rear of the board.
7
SOLDER THE LEDs
Solder the two Light Emitting Diodes into LED1 and
LED2. The red LED should go in LED1 and the green
LED in LED2. The LEDs won’t work if they don’t go in
the right way around. If you look carefully one side of the
LED has a flat edge, which must line up with the flat edge
on the lines on the PCB. You may want to solder them in at a
specific height depending upon how you have designed your enclosure (if
you are making one). Once you are happy solder them into place.
5
