| Electronics > Beginners |
| Cheap microphone - simple amp circuit |
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| Teledog:
Perhaps lightly off topic, This arrived today; https://www.ebay.ca/itm/DC-3-7V-6V-MIC-AMP-MAX9812L-TDA1308-Stereo-Microphone-Headphone-Amplifier-Module/112487497429?hash=item1a30c6fed5:g:azAAAOSwvDpa2wAS Used a high end noise cancelling electret mic (Polycom surplus), and yes, there is a DC bias on the mic input. ~5-6VDC batteries works best, added a 100uF electrolytic & a 0.1 cap at the DC input (USB chargers all have 60hz hum, good Li batt charger packs have little/no noise) For the price, easy-peasy, plug & play. Cranked up, you will hurt your ears with earbuds,.. if someone even burps in the near vicinity. my 2 cents... |
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