Transcript ASSEMBLING THE PCB

ASSEMBLING THE PCB
Have the PCB in front of you as shown. Make sure there are no
copper tracks showing. This side is called the component side.
ASSEMBLING THE PCB
Insert the two 220ohm resistors. These can be either way
round. Try to ensure they sit as close to the board as possible
ASSEMBLING THE PCB
Next insert the two timing resistors. These will be either 10K,
22K or 47K depending on how fast you want the LED’s to flash.
ASSEMBLING THE PCB
Next insert the two timing capacitors. It is important they
are inserted the correct way round. Note the black stripes on
the side of the capacitors, these denote the negative wire.
NEGATIVE CONNECTION
ASSEMBLING THE PCB
Now insert the two transistors. It is important the three
wires are inserted correctly and not twisted. Take care not to
heat the component with the soldering iron for too long.
ASSEMBLING THE PCB
Next feed the two wires from the battery clip up through the
3mm hole and back into the 1mm holes as shown. This provides
some strain relief for the wires to prevent them breaking.
ASSEMBLING THE PCB
Finally repeat the wiring process with two pairs of coloured
wire ready for soldering to the LED’s.