EEVblog #38 2of2 - Seismic Survey Boats & Relay Matrix Insulation Resistance Measurement
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''Yeah but it varies with temperature, time, someone farting across the other side of the factory'' ROFLMFAO . I had to rewind the video and watch the last bit again because I was laughing so much and missed it. XD
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i would have attached Analog to Digital Converts to every one of those mics and digitized the signel rather then have a low current go through that long of a cable
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Wow! That's like tens of nanoamps, no? was this with only twisted-pair? Shielded? It's amazing that you put it together yourself! Was the layout a challenge? I'd imagine that you would need very good isolation between digital and very sensitive analog circuitry.
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What level of test voltage was used to measure IR? Also, how many people were on the development team and how much time did you have to design the board? Thx!!
kchida1980 2 years ago
This one was only a low level of around 5-10V for IR. The hydrophones would actually be damaged at 50V. Another model of the system used 500V for the power wires as well.
One-man-band design team. Designed, Checked, and Approved by me :->
Probably spread over 6 months and went though many design and goal post changes.
EEVblog 2 years ago