Price - Stock No 132 




1. Check your P.C.Board carefully for damage to the tracks. A Circuit Tester or a multimeter will help check that there are no broken tracks.

2. Select the flashing pattern you desire and it's resistor placement.  Bend the legs of the resistor with long-nose pliers to match its holes and push it into place against the surface of the board. Remember that the drawing is looking at the PLAIN side with the tracks away from you. When in place, bend the legs sideways a bit to stop the resistors from falling out.   Solder in place - see Soldering Technique

3. Insert the IC socket.  Be careful to ensure all legs protrude through the holoes in the PCB.  Solder all legs of the socket.

4. Four PCB pins are located at the locations shown.  Solder in place.

5. The five LED's can now be inserted and soldered.  These are polarised so care needs to be taken to insert them in the correct orientation.

6. The battery holder is connected to the PCB pins as shown - note the polarity.  Solder to the PCB pins.  If you want to shorten the wires to the battery holder, cut them to an appropriate length, strip approximatley 5mm of insulation and tin the bare wires before soldering - See Tinning wire .

7.  The switch can be installed on the pcb pins and soldered.

8. Insert the microcontroller chip with the locating dot as per the diagram.

9. Insert batteries and  test.

Trouble shooting

Troubleshooting  if necessary will involve careful checking of locations and polarity of components. Re-solder all joints and check to make  sure  you  have  not  bridged across  between  any  two adjacent component legs.  The end  of  a  broken  hacksaw  blade  sharpened  on  an  emery wheel is a good tool for cleaning between soldered joints.

Technology Notes

The heart of this kit is the PIC12F675 which is a programmable Integrated Circuit.  This chip is probrammed to display the flashing patterns.

View the PIC 12F675 Datasheet

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