I was playing around with some cheap CCTV microphone modules and managed to create a monophonic spy ear bug for common DVRs. They can be directly powered from the existing CCTV camera power supply ...
1300B-M incorporates two pre-amp channels for microphone level audio providing up to +70 dB of front-end gain. These units can supply microphone phantom power at 48 VDC or a single ended supply of 12 ...
Do you remember the cctv microphone review published a while ago? (https://www.edn.com/cctv-microphone-review/). This is a continuation of that post. This time my ...
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