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Pre amplifier with 2 transistors

7 months ago 71
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Suddenly you got that nano mp3 player and decided to connect it to an amplifier but ...... it sounded not so good.. some distortions blah blah blah.

What you need is a good PRE AMPLIFIER! Yes!

A preamplifier will pick up the weak sound and raise it to a level such that your amplifier can work efficiently.

Lets do it? :-)





ID Name Designator Footprint Quantity
1 Audio_in IN AUDIO-PJ320 1
2 pws 5V DC-003A 3.5JACKS 1
3 both-channel-out OUT AUDIO-PJ320 1
4 left_channel L-OUT SIP-0.325INCH-2P 1
5 right-channel R-OUT SIP-0.325INCH-2P 1
6 2N3904 Q1-2N3904,Q2-2N3904 TO-92 2
7 10k R1,R3,R4,R6 AXIAL-0.3 4
8 100k R2,R5 AXIAL-0.3 2
9 0.1uF C1,C2,C3,C4 CAP-CT4G-0805-2.54MM 4
10 IN_left_channel L_IN SIP-0.325INCH-2P 1
11 In_right-channel R_IN SIP-0.325INCH-2P 1
12 10K LEFT,RIGHT RK097111080J 2
13 100nF C5,C7 CAP-CT4G-0805-5.08MM 2
14 10uF C6,C8 CAP-D5.0XF2.0 2




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Comments (2)

UserSupport Reply

Nice work! ....

arsacd Reply

@UserSupport Thank you  :-)

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