danrogers
Member
Hi all, its been a long time since I decided to make some VU meters. I remember Audio Guru suggesting to use his pre-processing circuit to smooth the peaks etc before running into the LM3915 IC.
I have just finished a basic PCB design, incorporating the pre-processing stage suggested and the LM3915 circuit. I have also used a 12v linear regulator to power the LM3915's and a 9v regulator to power the op amp and the pre-stage.
I'd like any suggestions on how to improve the circuit and to pick up if I have made any silly errors! The circuits are mirrored, I have used the component numbering from the pre-stage schematics and added the letter 'B' for the second channel.
I will attach the board layout obviously and the two schematics I have used.
Thanks in advance
I have just finished a basic PCB design, incorporating the pre-processing stage suggested and the LM3915 circuit. I have also used a 12v linear regulator to power the LM3915's and a 9v regulator to power the op amp and the pre-stage.
I'd like any suggestions on how to improve the circuit and to pick up if I have made any silly errors! The circuits are mirrored, I have used the component numbering from the pre-stage schematics and added the letter 'B' for the second channel.
I will attach the board layout obviously and the two schematics I have used.
Thanks in advance
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