Group 4 - MAKE - Philip

=DIY Chip= Text and pictures from BonsaiBob

Material
1. circuit board

2. semiconductor

3. ceramic caacitor

4. insulated wire

5. piezo speaker

6. led light

7. battery 3V/9V and battery connection



Tools
1. UV lamp

2. NaOH = developer, NaSO4 = caustic

3. abrasive paper

4. soldering bolt, solder

5. wire cutter

6. tweezers



Create a printed circuit board
Step 1: Take a photosensitive laminated PCB card and draw or fix the PCB layout on the card. (black pen or printed transparent sheet)



Step 2: Place the board under the UV lamp for about 2 minutes or go outside and expose it to the sun (exposing time outside depends on the intensity of the sun) - Don`t leave it to long exposed!

Step 3: Put it in a bath of acid (NaOH) - Stir every 2-3 minutes!

Step 4: Take it out, clean it with water and put it in a bath of NaSO4 - Stir every 3-5 minutes!

Step 5: Take it out and clean it again with water

The chip is now ready for soldering.



Connect components with the chip
Step 1: Take the abrasive paper and sand the chip.



Step 2: Bend and shorten the edges of the semiconductor

Step 3: Connect the semiconductor onto the chip - !Watch the direction of the semiconductor!

Step 4: Add the other components (ceramic capacitor, led light, speaker, battery connection)



Step 5: Connect the battery and make noise :D

Tipp: For a louder output use a 9V battery or connect the chip to an external speaker.