Hi all,
Quick question. I'm using the MICS-5524 sensor in a project. I've been working on the math to convert voltage to RS/R0 to PPM.
I knew that the input voltage mattered to the output signal, so I included it in my equations.
For example, the input voltage powered from the USB programming cable is 4.88; 5.19 from the wall wart power supply.
The output of the sensor varies proportionally.
Anyway, I was thinking I might add a zener to provide a more precise input voltage?
Does that make sense to anyone else?
Opinions valued,
Daniel
MICS-5524 ... should I use a zener for precise input voltage
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- djzman
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Re: MICS-5524 ... should I use a zener for precise input vol
One thing I'd note is that wall wart PSUs are often switch mode power supplies and these tend to produce a lot of noise. I tried one to feed a cheap AMS1117 based regulator PSU and it put a lot of high frequency noise on the power (observed on an oscilloscope). Even with 5V disconnected the noise was still present indicating it's coming through GND.
Please be positive and constructive with your questions and comments.