Hi all,
I am modifying a digital recorder board that uses an electret mic for recording the sound into an ISD 2560 chip. I would like remove the mic and use a 1/8" mono jack so I can input .wav files directly from my computer. The board runs on a 9 volt battery and the mic has 9VDC across it. Is there a way to eliminate or otherwise negate this voltage so my sound card isn't damaged? Perhaps an appropriate cap in series? All advice appreciated.
I am modifying a digital recorder board that uses an electret mic for recording the sound into an ISD 2560 chip. I would like remove the mic and use a 1/8" mono jack so I can input .wav files directly from my computer. The board runs on a 9 volt battery and the mic has 9VDC across it. Is there a way to eliminate or otherwise negate this voltage so my sound card isn't damaged? Perhaps an appropriate cap in series? All advice appreciated.