I noticed that when I measure the groung with an osciloscope, I do not have a flat line at this point.
is it normal? or I have problems with mi ground.
My voltage source is a +/- 12 volts the source of this DC voltage comes from a central tap trasformer 24V ac. The central tap is the ground, and here I connect all ground point of all my digital circuits and an analog signal that is acquired by a differential amplifier configuration.
Also I have noticed that when a relay is on my rectified signal that comes from the differential amplifier is noisy, it has disturbances.
Does I have to put a diode in serie from the regulator of 12V to the relay?
thanks
is it normal? or I have problems with mi ground.
My voltage source is a +/- 12 volts the source of this DC voltage comes from a central tap trasformer 24V ac. The central tap is the ground, and here I connect all ground point of all my digital circuits and an analog signal that is acquired by a differential amplifier configuration.
Also I have noticed that when a relay is on my rectified signal that comes from the differential amplifier is noisy, it has disturbances.
Does I have to put a diode in serie from the regulator of 12V to the relay?
thanks