Timeline for Arduino serial communication produces noise on electret microphone
Current License: CC BY-SA 3.0
16 events
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| Feb 7, 2013 at 14:52 | comment | added | ryantuck | Chetan, why would I necessarily benefit from having a pre-amp in this circuit? Would that help eliminate the unwanted digital communications noise on the board better than the LM386? | |
| Feb 6, 2013 at 23:20 | comment | added | Chetan Bhargava | LM358 is maybe what you need instead of LM386. LM386 is a power amp. You need a pre-amp. | |
| Jan 7, 2013 at 22:21 | history | edited | ryantuck | CC BY-SA 3.0 |
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| Jan 7, 2013 at 19:03 | comment | added | ryantuck | Both GND pins are connected to ground. AVCC is connected to +5V | |
| Jan 7, 2013 at 19:01 | history | edited | ryantuck | CC BY-SA 3.0 |
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| Jan 7, 2013 at 18:30 | comment | added | Passerby | Do you have both GND pins connected to ground? The schematic cuts off on the AVCC, but I'm assuming that is connected to 5v as well. Double check that the second ground pin is connected. | |
| Jan 7, 2013 at 18:23 | history | edited | Oli Glaser | CC BY-SA 3.0 |
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| Jan 7, 2013 at 17:59 | history | edited | ryantuck | CC BY-SA 3.0 |
responding to comments.
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| Jan 7, 2013 at 17:01 | comment | added | jippie | Please post a picture. | |
| Jan 7, 2013 at 16:48 | comment | added | Michael Karas | Do you have this thing built up with a solderless breadboard and a bunch of flying wires leading everywhere? If so you may need to look at an alternate construction style with GND planes and real PC board techniques in use. | |
| Jan 7, 2013 at 16:34 | comment | added | Passerby | It would be nice to know how you have everything hooked up, breadboard or pcb? Modules or individually wired parts? Which arduino? | |
| Jan 7, 2013 at 16:29 | comment | added | Passerby | @MattYoung The LM386 is a "Low Voltage Audio Power Amplifier", what exactly do you mean wrong part for the job? | |
| Jan 7, 2013 at 16:10 | review | First posts | |||
| Jan 7, 2013 at 16:29 | |||||
| Jan 7, 2013 at 16:03 | answer | added | vicatcu | timeline score: 1 | |
| Jan 7, 2013 at 15:56 | comment | added | Matt Young | Post a schematic, also, the LM386 is the wrong part for the job. It is a power amplifier. | |
| Jan 7, 2013 at 15:53 | history | asked | ryantuck | CC BY-SA 3.0 |