/ /Light Sensitive Circuit

Parts

Circuit 1

• Conductive thread
  
• Needle
  
• 3 Volt battery
  
• Battery holder
  
• LDR
  
• LED
  
• Resistor
  
• Tip+120 Transistor
  
• Fabric
  

Circuit 2

• Conductive thread
  
• Needle
  
• 3 Volt battery
  
• Battery holder
  
• LDR
  
• LED
  
• Resistor
  
• NPN 3904 Transistor
  
• Fabric
  

/ / Your Circuits

Assignment: Create a light sensitive circuit design.

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If you are adding additional LEDs, you may want to sketch a schematic and then test on the breadboard

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Prepare the transistor by soldering crimping beads onto the leads

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Prepare LEDs

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/ / Monster Night Light

1. Push leads of LEDs through fabric and thread them through the PCB boards. Take care to thread the leads correctly. Anode to + and cathode to -
   
   
   

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2. Solder leads to PCB boards
   
   
   

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3. Solder the power leads together using hook-up wire
   
   
   
   
   

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4. Solder grounds together using hookup wire
   
   
   
   
   

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5. Connect a GND lead of the LEDs to the collector
   
   
   
   
   

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6. Stich the leads of the LDR through the fabric. The LDR should be on the front of the fabric
   
   
   
   
   

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7. Use pliers to turn the leads into loops
   
   
   
   
   

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8. Connect the base to one lead of the LDR
   
   
   
   
   

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9. Prepare the 10K resistor
   
   
   
   
   

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10. Connect the LDR to one lead of the 10 resistor
    
    
    

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11. Connect the other lead of the 10K resistor to the power lead of the coin cell holder
    
    
    

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12. Connect the emitter to to one half of a snap. Make sure that the snap is outside the circle
    
    
    

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13. Cover the thread with hot glue
    
    
    

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14. Connect the other lead of the LDR to the GND lead of the coin cell holder
    
    
    

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15. Connect the GND lead of the coin cell holder to the other side of the snap
    
    
    
    
    
    
    

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16. 
    
    

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17. 
    
    

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18. 
    
    

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19. 
    
    

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Sources:
http://web.media.mit.edu/~leah/grad_work/diy/diy_e_sewing_old.html
Fashioning Technology: A DIY Intro to Smart Crafting by Syuzi Pakhchyan
http://www.kpsec.freeuk.com/seriespa.htm
Open Softwear
http://www.electroniccrafts.org