I'm trying to build a static meter by using an op amp (see attached circuit diagram). When I created a similar circuit using a single power supply (the negative end defined as ground) the circuit worked fine, but would only sense static charges of one polarity, to try to solve this I changed to the circuit shown in the diagram using 2 batteries and in between the 2 defined (arbitrarily) as ground.
This circuit gives a reading on the moving coil meter even when no static is at the aerial, even when the inverting and non inverting inputs are wired together in fact.
If anyone could give me a steer in the right direction Id very much appreciate it
This circuit gives a reading on the moving coil meter even when no static is at the aerial, even when the inverting and non inverting inputs are wired together in fact.
If anyone could give me a steer in the right direction Id very much appreciate it
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