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| Help in designing a VU meter circuit w/ an electret mic. |
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| fcb:
LM324 - it's much more nuisanced than that. Noise and distortion are unlikely to be issues if you aren't actually listening to the output of your amplifiers, and if you haven't got an oscilloscope then you are flying blind somewhat. The schematic of the virtual ground looks OK, but it won't source/sink much current, so you'll have to watch your design. |
| K-Experiment:
Thank you for helping me, I have learned a lot of things, and if you have any more recommendations pls tell me. |
| schmitt trigger:
Because you will be driving a lot of LEDs, your current consumption can be significant for a 9V battery. You have two options: -connect the LM3915 in dot mode. -use 6 AAA batteries in series. Actually AA would be even better, if you have the space. |
| K-Experiment:
alright, anything else? |
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