I have a circuit with a bunch of analog gas sensors sending their readings to a server.
Sometimes the value read will drop for all the sensors connected in one reading.
I have set it up so that the data is sent every 5 seconds, and in that time, three samples are taken, spaced apart and averaged out.
The circuit is running through to the adc through a LM358 op amp running as a straight buffer and a 10K trimpot to adjust the load.
Note that this was also occurring before with a similar setup that was using these sensors on pre-made shields with slightly different op-amps and some different sensors. These shields were a bit more ‘proper’ with the correct capacitance values etc
I am supplying more than enough power so its not that…
Any ideas folks? Thanks in advance!