• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

any one can help on the amplifier circuit? (images)

Status
Not open for further replies.

kuangmao

New Member
i am so sorry.....i forgot to draw the audio input jack.....
this is an audio amp.
123.JPG

amp.JPG

1234.JPG i connected likethis
 
Last edited:

Hayato

Member
Yes, both are wrong.

Your picture is very unreadable.
As far I can see it is powered by a DC source.

Draw it again without the connections and name the terminals so that I can help you.
 

audioguru

Well-Known Member
Most Helpful Member
If the variabler resistor is supposed to be a volume control then it should adjust the level of the input, not the power supply DC voltage.
 

Hayato

Member
I think you did not get what I have said to you, kuang.

I'll name the terminals.

Switch -> Has 3 terminals. A, B, C. From Left to Right.
Potentiometer-> A,B,C. From Left to Right.

DC + jack -> Fuse -> Switch B.
Switch A -> DC + Input.

DC - jack -> DC - Input.

Audio + Jack -> Potentiometer A terminal.
Audio - Jack -> Potentiometer C terminal and Audio - input.

Potentiometer B -> Audio + input.

Led: You'll have to add a 1.2k resistor:
Switch A --- 1.2k resistor ---- Anode
Cathode--- DC -

Look at the led base. Cathode is the flat spot.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top