Search found 4 matches

by nehallem
Mon Jun 27, 2016 4:35 pm
Forum: USB PC Oscilloscopes
Topic: USB based oscilloscope GND connection problem
Replies: 7
Views: 7377

Re: USB based oscilloscope GND connection problem

Hi nehallem, A circuit diagram would be helpful, including where you are connecting the probes from the PicoScope. What settings are you using for voltage range etc.? Regards, Hi, it's doesn't need a circuit diagram because the probes are connected directly to pin number 9 which is GND and the sign...
by nehallem
Sun Jun 26, 2016 10:32 am
Forum: USB PC Oscilloscopes
Topic: USB based oscilloscope GND connection problem
Replies: 7
Views: 7377

Re: USB based oscilloscope GND connection problem

Hi I don't have a picture with the setup but I have just the GND from the pico connected to pin #9 and the signal wire is connected to pin #19 (MOSI) or #23 (SCLK) and there is nothing measured with the pico, if I put a wire beetwen MOSI and MISO than I receive what I send but on the pico is nothing...
by nehallem
Tue Jun 21, 2016 6:43 pm
Forum: USB PC Oscilloscopes
Topic: USB based oscilloscope GND connection problem
Replies: 7
Views: 7377

Re: USB based oscilloscope GND connection problem

Hi nehallem, The PicoScope is grounded via the connection to the PC. You may have a ground loop somewhere if the Raspberry Pi or something connected to the Pi is at a different ground potential. What signals are you trying to view on the Raspberry Pi? A circuit diagram showing the connections might...
by nehallem
Tue Jun 14, 2016 8:19 pm
Forum: USB PC Oscilloscopes
Topic: USB based oscilloscope GND connection problem
Replies: 7
Views: 7377

USB based oscilloscope GND connection problem

Hi, I have the 2204A picoscope, is working very well but I need to view some signals on the raspberry pi, the problem is that when I connect the ground of the picoscope to the raspberry then the USB communication between the oscilloscope and the desktop computer is lost, right after is reconnect but...