Hello tinkerers,
I am having a technical problem, which did not occur during the breadboard phase, which I expected that It should have happened.
the first board img 1790.JPG
contains a
ac to dc TMPS 05-112 AC to DC convertor which is cosy.
lm7806 for 6V regulation.
and a NMXD0512S0 with a 7V max input and a +-12V 235mA which is enough for driving the next board.
second board contains
non inverted OPAMP LTC1354 with dual termination 49,9 ohm and 5K for RG.
I connected the ground of the secondboard with the BNC termination over to the first board. the 230V ground is not connected to the NMXD0512S0, because it has its own ground.
I noticed during testing that the signal from the function generator was interfering with the DCDC NMXD0512S0 creating very high pitched unsual sounds. and I was wondering how to solve this? If I do not connect the BNC to the ground I get a Antenna effect that doesnt help at all. evenso using an 49,9 ohms.
Should I use some Inductors? between the lines?
I am having a technical problem, which did not occur during the breadboard phase, which I expected that It should have happened.
the first board img 1790.JPG
contains a
ac to dc TMPS 05-112 AC to DC convertor which is cosy.
lm7806 for 6V regulation.
and a NMXD0512S0 with a 7V max input and a +-12V 235mA which is enough for driving the next board.
second board contains
non inverted OPAMP LTC1354 with dual termination 49,9 ohm and 5K for RG.
I connected the ground of the secondboard with the BNC termination over to the first board. the 230V ground is not connected to the NMXD0512S0, because it has its own ground.
I noticed during testing that the signal from the function generator was interfering with the DCDC NMXD0512S0 creating very high pitched unsual sounds. and I was wondering how to solve this? If I do not connect the BNC to the ground I get a Antenna effect that doesnt help at all. evenso using an 49,9 ohms.
Should I use some Inductors? between the lines?
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