hellohello
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I am designing 1W Audio Amplifier with mute and volume control which allow end-user to select two different types of frequency response, namely speech and music.The selected choice must be indicated using LEDs (three) which is the end-user has a choice of selecting voice (300hz to 3.3K hz), music or mute mode.
I am a noob in this kind of subject and am now learning. I have come up with the pre amp circuit but wasnt sure how to combine the transistor switching circuit (using SPDT switch- simulated 2 bit signal for mode selection) to the pre amp before connecting to audio amp and speaker (I am using TDA7052A audio amp and 0.5W 8 ohm speaker)
Attached is the draft I have come up with, the left is the pre amp and the right is the circuit for audio amp which I hope both are correct. I left out the transistor switching circuit (require 5V)(suppose to connect to pre amp) as i am not sure how to proceed.
I have left out the calculations as I am still trying to figure out how to calculate as I need the complete diagram first.
Really need your help here .
I have searched through the net and threads but hasnt found anything similar.
Urgent help appreciated!
I am a noob in this kind of subject and am now learning. I have come up with the pre amp circuit but wasnt sure how to combine the transistor switching circuit (using SPDT switch- simulated 2 bit signal for mode selection) to the pre amp before connecting to audio amp and speaker (I am using TDA7052A audio amp and 0.5W 8 ohm speaker)
Attached is the draft I have come up with, the left is the pre amp and the right is the circuit for audio amp which I hope both are correct. I left out the transistor switching circuit (require 5V)(suppose to connect to pre amp) as i am not sure how to proceed.
I have left out the calculations as I am still trying to figure out how to calculate as I need the complete diagram first.
Really need your help here .
I have searched through the net and threads but hasnt found anything similar.
Urgent help appreciated!