good evening everyone. i'm on a project on breadboard ad the device is basically working. ( is a crossover project 153 from elliot sound product )
however, i'm getting those tones on the spectrum . first frequency is constant at 50hz plus harmonics and the one at 16khz is present only when the device is on. what could it be caused by? screenshot attached
i have some patch cables outside the breadboard as well (not enough space)
at the moment i'm powering up with a uzeus tiptop audio (small switching power supply) but i'm goint to order this as soon as everything will work fine and will be ready for building:
RAC20-15DK RECOM Power | Mouser Italia
thanks for any help,
cheers
however, i'm getting those tones on the spectrum . first frequency is constant at 50hz plus harmonics and the one at 16khz is present only when the device is on. what could it be caused by? screenshot attached
i have some patch cables outside the breadboard as well (not enough space)
at the moment i'm powering up with a uzeus tiptop audio (small switching power supply) but i'm goint to order this as soon as everything will work fine and will be ready for building:
RAC20-15DK RECOM Power | Mouser Italia
thanks for any help,
cheers
Attachments
You didn't mention whether you paid any attention at all to grounding and shielding, or how you are disposing of power supply line filter leakage currents (the other prominent source of 50 Hz aside from ground loops). No photo to go by either.
Usually breadboarding is just that, verifying that the circuit does roughly what it's supposed to before proceeding with the board layout. It is possible to achieve good performance even with point-to-point (P2P) wiring but you have to know what you're doing.
Usually breadboarding is just that, verifying that the circuit does roughly what it's supposed to before proceeding with the board layout. It is possible to achieve good performance even with point-to-point (P2P) wiring but you have to know what you're doing.
i'm still learning and i'm following the schematic provided on ESP page 'Isolator' Equaliser. i don't know everything but i'm doing my best to make this work. I'm asking advice in order to understand and get better since this is my first project on breadboard.
all the grounding are connected as shown in the schematic but the circuit is not yet shielded. i'm taking the +-12v straight from the uzeus and actually i haven't done the line filtering, will do straight away, that could be the cause.
thanks for your comment sgrossklass, you gave me a big hint
all the grounding are connected as shown in the schematic but the circuit is not yet shielded. i'm taking the +-12v straight from the uzeus and actually i haven't done the line filtering, will do straight away, that could be the cause.
thanks for your comment sgrossklass, you gave me a big hint
You'll only be able to eliminate mains harmonics on a breadboard by going outside and using battery power... 16kHz is odd though - its a subharmonic of many ADC sampling rates, might be an artifact of that, or of the power supply, or from nearby lighting.
today i changed power supply. now i'm using a Meanwell rt-65b and the frequency at 16khz disappeared, the 50hz has been reduced a lot as well, it was coming from the uzeus power supply!