Light Controller

PICAXE

PIC-Logicator 2005

Light Controller

PCB Wizard Actual Circuit

Artwork Silkscreen Solder Side

Space for LDR and resistor if needed

Component Drawing Component List. 1. Battery + Holder. 2. PIC Chip 3. Capacitor 4. LED (light emitting diode). 5. Resistor 22K (red red orange). 6. Resistor 10k (brown bl ack orange).

7. Switch spdt (single pole double throw) 8. Jack Plug Socket. 9. PCB (printed circuit board)

Component symbol

6.

Where to put the components. N.B. All components go in from the reverse side.

7.

3.

4.

1.

4.

4.

7. 4.

4. 4.

4.

2.

5.

8.

Solder Side

Component Side

NB 4 wire Bridges are also needed to make the circuit work

4 wire bridges will also be needed to complete circuit

Components in Red (LDR and 220Ώ Resistor are not necessary to programme the light circuit. They have been included as an option to push more able pupils.

A spaces have been left for them on the circuit board

Programming

When programming remember that Outputs 0, 1 and 4 work in pairs while Output 2 has a single LED attached

Pic Project Components Order

No. Product Order code Order Total Quantity Unit Price

1a Battery Holder 18-0498 100 25.00 1

1b Battery 3v Lithium coin cell 18-0490 100 37.00 1

2 Pic Chip PICAXE08 10 10.00 1

3 Capacitor 100nF 10-0230 100 6.00 1

4a Red LED per 100 55-1796 1pkt 3.50 2

4b Orange LED 55-0124 100 6.00 2

4c Green LED per 100 55-1792 1pkt 3.80 2

4d Yellow LED per 100 55-1794 1pkt 3.80 1

5 22k Resistor per 100 62-0588 1pkt 1.00 1

6 10k Resistor per 100 62-0580 1pkt 1.00 1

7 Miniature PCB Switch (spdt) 76-0270 100 15.00 2

8 Download Socket 20-0137 120 9.00 1

9 PCB 305mm x 475mm 34-0176 1 11.80 60x50mm

10 Foamex A4 305 X 230mm

11 Self-Tapping Screws 100 2

Sub-Total £

Standard Charge For Solder, Developer, Etchant,Electricity,ect. 0.06

Total £

Step 1. Cost of large sheet of PCB? £______ (Answer 1) Step 2. Area of large sheet of PCB? Length (mm) x Breadth (mms) = _______sq mm (Answer 2) Step 3. Area of my PCB? Length (mm) x Breadth (mm) = _______sq mm (Answer 3) Step 4. Number of sheets of my PCB that can be cut from large sheet? Answer 2 divided by Answer 3 = __________ (Answer 4) Step 5. Cost of my PCB? Answer 1 divided by Answer 4 = £_________ (Answer 5) Now add your answer to your costing and finish working out the total price.

11.80

305 x 475 145,825

60 x 50 3,000

145,825 3,000

0.2511.80 48

(Full sheets)

(Round answer up)

48

Step No.

Description of work

Resources (tools and materials) Time

1. Create PCB. UV. Light box, Developer, Acid (Ferric Chloride)

15min

2. Clean PCB PCB Eraser 1min

3.

Planning for making. Example and key words

Key Words.

PCB drill. Safety specs. Soldering station. Wire strippers. Long nose pliers. End snips. Solder. Soldering board. Electrical components. Battery holder. Switch. PCB. Capacitor. Light emitting diode. Resistor. Ventilation. Download socket Safety. PIC Chip. Resistor. CAD/CAM. CNC Machine. Foamed PVC. Lid/Base.

Drill. Dr Stikka. Packaging. Quality. Silicone carbide paper.

Case Ideas

Orthographic Drawing

1. Thread the centre sections and backs onto a 3mm plastic tube using the pilot holes as guides.

2. Glue the sections together using liquid solvent cement. Capillary action will suck the glue in along the joints.

3. Using a junior hacksaw cut off any excess pipe and you may want to drill holes to gain access to the on/off switch.

Assembly

4. Smooth the edges of the material using silicone carbide paper working your way up the grit size until a smooth edge finish is achieved. Make sure you do not wrap the paper around the sides since this will scratch the surface and spoil

the finish of your material.

5. Smooth the edge of the front cover using silicone carbide paper and polish to a bright finish. 6. Apply 2 Stainless steel panhead Self-Tapping Screws to attach the cover to the case.

EVALUATION

Use the following points to help you with your evaluation.

* Explain the good and bad points of mass production.

* In what way does your finished work answer the points of the design specification?

* Use notes and diagrams to explain how you could improve your work.

* What do others think of your finished work, including your folder?

* What is the most important thing that you have learned?

* What are the things that gave you most and least satisfaction in doing.

* What problems did you have during making your product and how did you overcome them?

* Did you manage your time effectively or not and in what way did you do this?