As I have learned, the TT earthing system is primarily used in our country.
My power source is an unregulated AC/DC adapter. A transformer and a full bridge rectifier circuit are typically found in these circuits.
I don't know exactly the circuit diagram of the power supply.
But I guess so.
In the upper left corner of the power supply picture, you can see a small switch.
This little switch adjusts the polarity.
The large switch at the bottom controls the output voltage.
The oscilloscope has a 3-pin power plug and is plugged into a 3-pin F type wall mains socket. Oscilloscope has an F type plug. But power adapter has a C type plug. It has only two pins.
I constructed the circuit below to provide the necessary voltage for the operational amplifier.
The main circuit consists of a non-inverting operational amplifier.
The signal generator is based on the XR2206 chip.
The signal generator is powered from a different 12 volt switching power supply.
Is it safe to connect oscilloscope probes as shown in the figure?
Let's assume that we want to amplify the signal coming from the sound card output rather than the sine wave.
Is connecting the sound card's ground connection to the virtual ground a safe practice?