If you decide to use 2 circuits, i just connect their outputs together...neg output from first circuit to neg output of second circuit & pos output from first circuit to pos output of second circuit.
And take readings from same place....from where you conected the 2 circuits together.
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Ground wire connects off of circuit, from inbetween 2 large electrolytic capacitors.
4) .1 micro Farads ceramic disk capacitors
2) 100. micro Farads electrolytic polorized capacitors
4) germanium diodes (1N34A)(mouser# 526-1N34A)
diodes can be found here at mouser, these are the one that i use..... http://www.mouser.com/Search/Refine.aspx?Keyword=1n34
i see that there are a few types of germanium diodes out there, the ones i get from mouser are rated at Peek Reverse Voltage 75V
here is another website that has good picture of them...but not sure if they are exactly the same ratings.
https://www.micro-tools.com/store/item_detail.aspx?ItemCode=1N34A
here is a website that has specifications on some of the differant types... http://www.datasheetcatalog.com/datasheets_pdf/1/N/3/4/1N34A.shtml
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