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9V Siren

Documentation in acrobat format (K31)

cps31.jpg
A surprisingly loud siren for such a simple circuit. Uses voltage controlled oscillator. 0.5 Watt, 8 ohm speaker supplied. 9V operation. Ideal to attach to an alarm system which needs an sound module.(CPS31)
 
Quantity
Price
1 – 9$13.68
10 – 99$12.96
100 +$11.88

  (Kit - Basic Soldering Required)  
  CPS31  
  5  
 
 
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Click here for detailed specs.
Mini-Vox and Relay kit
 
The idea behind a VOX (voice activated switch) is that instead of the user pressing a switch to activate a relay, the sound of the users voice itself activates the relay. This gives hands-free control over devices like tape recorders. Power supply needed: 12VDC center positive 2.5mm jack. Electret microphone to pick up the sound is included. PCB size: 44mm x 48mm (1.73inch x 1.89inch).
(CPS126)
Quantity
Price
1 – 9$15.39
10 – 99$14.58
100 +$13.37

  (Kit - Basic Soldering Required)  
  CPS126  
  12  
 
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