/Schematics/Audio devices/Very sensitive audio amplifier

Part list

P1_____________22K   Log. Potentiometer
R1,R9__________10K   1/4W Resistors
R2______________1M   1/4W Resistor
R3______________4K7  1/4W Resistor
R4,R7_________100K   1/4W Resistor
R5______________3K9  1/4W Resistor
R6______________1K5  1/4W Resistor
R8_____________100R  1/4W Resistor
C1,C2_________100nF  63V Polyester or Ceramic Capacitors
C3,C6___________1µF  63V Polyester or Ceramic Capacitors
C4_____________10µF  25V Electrolytic Capacitor
C5____________470µF  25V Electrolytic Capacitor
D1___________1N4148  75V 150mA Diode
Q1,Q2,Q3,_____BC547  45V 100mA NPN Transistors
Q4____________BC337  45V 800mA NPN Transistor
MIC1__________Miniature electret microphone
SW1____________SPST Switch (Ganged with P1)
J1_____________Stereo 3mm. Jack socket
B1_____________1.5V Battery (AA or AAA cell etc.)

Use 32-ohm headphones. Amplifier is very sensitive and could be used for some kind of eavesping.

Author (sent by): Red circuits

Download counter: 1,709

Rating: (2.82, votes 1234)

Vote:

Date: 26-03-2007

Lokalna verzija ove stranice: Veoma osjetljivo audio pojačalo

77_veomaosjetljivoaudiopojaalo.zip

Bookmark and Share Comments (0)


Comment page:


add comment

name

e-mail (will not be published)

website

How much is = also add letter "a" at the end of your result! Eg.: 7a

Please log-in!

You can log-in on forum link: Login page. After logging-in, return to this page and click refresh in your browser.

site friends

sponsored links

ads


By using this website, you expressly agree to the placement of our performance, functionality and advertising cookies. Cookie policy