Powerful Siren by BC337

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Parts:

R1,R3____________1K 1/4W Resistors
R2,R5___________10K 1/4W Resistors
R4_____________220R 1/4W Resistor
R6_____________220K 1/4W Resistor
R7______________22K 1/4W Resistor
R8_____________100K 1/4W Resistor

C1,C2___________22µF 25V Electrolytic Capacitors
C3______________10nF 63V Polyester or Ceramic Capacitor
C4______________47µF 25V Electrolytic Capacitor

Q1,Q2_________BC557 45V 100mA PNP Transistors
Q3____________BC337 45V 800mA NPN Transistor

SW1___________SPST Toggle or Slide Main Switch (See Notes)
P1____________SPST Pushbutton Operating Switch

SPKR__________8 Ohm Loudspeaker

B1____________12V Battery

Read More Source:
http://www.redcircuits.com//Page84.htm
Thank you.

This entry was posted on Wednesday, January 2nd, 2008 at 9:54 am and is filed under Automotive, alarm systems, basic electronics. You can follow any responses to this entry through the RSS 2.0 feed.