attila

HI @Chaofan Song This error is usually received with USB contact problem, the cable seems to disconnect. Try using other USB cable, other computer USB socket, other computer, powered USB hub... For warranty and replacement contact the support.digilent at ni.com specifying the Date of Purchase, Seller and Purchase Order/ Web order Number.

Hi @akhilesh1028 Is the board supplied with 3.3V ?

Hi @l.chaput There is no voltage or current readback hardware in AD2, but only voltage setting.

Hi @Jan Didden There is no such option in the Logger but you have Add Reference and Add Tab (after the buffer) in the Scope.

Hi @reddish Here you have an example for stereo play and record: AnalogOutIn_PlayRecordStereo.py For synchronized Wavegen output you can use either channels to be maser or use Configure with -1 to set up master automatically. dwf.FDwfAnalogOutConfigure(hdwf, c_int(-1), c_int(1)) For triggering various combinations can be used, depending on the requirements. For this purpose the easies is probably triggering the Scope on Wavegen. dwf.FDwfAnalogInTriggerSourceSet(hdwf, trigsrcAnalogOut1)

Hi @Richard H An adapter board would be the easier and safer to do. The R26/27 are on the bottom of the board.

Hi @etl17 The expected range for the current is calculated based on the maximum voltage / resistor. pic1: With Vrc above 2.5V the high range of the Scope input is used, ~25V, ~250mA max, ~30uA resolution pic2: With Vrc 2.5V or lower the low range of the Scope input is used, ~2.5V, ~25mA max, ~3uA resolution pic3: I've added IMax options in the latest software version which can be used to specify the maximum expected current. Thank you for the observation.

Hi @Joaquim Silva The Value2Text(1,1) function call is there only to test the script with the Evaluate (abc) button. Normally when new data is captured/loaded the Decoder script is executed to process rgData array to rgValue and rgFlag arrays. Then, for display purpose the Value2Text function is called by the application to represent each value/flag as text in the main drawing, data, events views...

Hi @Tan I don't know who you have contacted but there is no Digilent support in Singapore. I've just asked the support team and they are unaware of this case. For warranty and replacement contact the support dot digilent at ni dot com specifying the Date of Purchase, Seller and Purchase Order/ Web order Number.

Hi @yellowkiwi Select Show: Colored

Hi @sergiodorazio As an alternative solution you could launch external application from the Script, with Tool.start() or Tool.exec()

Hi @Lars Lindner The time.sleep(0.01) is optional. It may be require but the DUT, resonant circuits may require more settle time. The AD2 has a minimal temperature drift but this should mostly affect the DC component. You could leave the device running at least for ~15 minutes before starting measurements to reach a stable temperature. I don't know what DUT are you measuring but this may be influenced like by temperature. A 100pF ceramic capacitor show 1-2% difference at ~10*C difference:

Hi @Leo_W That is C416 0402 10nF 16V You could leave the device with your shorts instead of the ferrite beads. I don't think it makes too much difference specially when it is used with laptop. The damage was probably caused by connecting external power supply to AD2 ground. To prevent such you could use USB isolator.

Hi @sergiodorazio The WF app can only run in foreground. For custom application or script see the WF SDK.

Hi @jfdo 33 Ohms https://reference.digilentinc.com/reference/instrumentation/analog-discovery-2/reference-manual#audio

Hi @smeredith It is solved in the latest beta version: https://forum.digilentinc.com/topic/8908-waveforms-beta-download/

Hi @Tan It could be a software/driver issue or powering issue. Please try using the latest software: https://reference.digilentinc.com/reference/software/waveforms/start If it is still not working try using the device with another computer, eventually power USB hub or auxiliary 5VDC supply.

Hi @CPP Thank you for the observation. It is corrected for the next build. Edit: https://forum.digilentinc.com/topic/8908-waveforms-beta-download/ There is a threshold in demo mode deciding at what sampling/generator rate it performs signal preview or random. This was at 10 so for a 200kHz sample rate (100kHz spectrum top) generated preview for signals up to 20kHz. This is now changed to 2.

Hi @sergiodorazio Use: "C:\Program Files (x86)\Digilent\WaveForms3\WaveForms.exe" "C:\Users\T0102950\default.dwf3work -runscript

Hi @jfdo I think you should try directly driving the transformer with the Wavegen or audio output. In case the signal gets distorted: - use only at higher frequency, like >100Hz - limit the amplitude to 2,3,4V - use a series resistor of about 100-200 Ohms to limit the current The 1k impedance rating of the transformer is probably at 1kHz, but at low frequency or the DC resistance is probably about 100 Ohms. The Wavegen can output 10-50mA, depending on the voltage level. https://reference.digilentinc.com/reference/instrumentation/analog-discovery-2/start https://reference.digilentinc.com/reference/instrumentation/analog-discovery-2/reference-manual#audio Here you can see the impedance of an audio transformer with 136 Ohm DC resistance + 68 Ohms, sec 68 Ohms load: At 10Hz the impedance is low so the Wavegen enters in limitation at 3.7V : At 100Hz the impedance is higher and it can drive even at 100 Ohms.

Hi @jfdo The Wavegen output may enter in current limitation at higher voltages with low impedance, like at lower frequency. You could also try to use the audio output of the Analog Discovery. https://reference.digilentinc.com/reference/instrumentation/analog-discovery-2/reference-manual

Hi @Leo_W Those are ferrite beads supposed to filter noise but it could also act as fuse. 50mOhm/1A BK2125HS470-T

Hi @Riccardo98 WaveForms application 3.16.22 should be backward compatible to MacOS 10.12 and the dwf.framework (API/SDK) to 10.9 https://forum.digilentinc.com/topic/8908-waveforms-beta-download/

Hi @Richard H The viable solution is using an external circuit with differential amplifier next to the shunt. In the ADP3000 the low range is 2V instead of the AD2 5V pk2pk. Increasing input capacitance on AD2 may make it unusable with 10x probes. Using switched resistors would be a problem at high frequencies. Higher amplification on the signal (and noise) may bring minimal improvement on the effective resolution.

Hi @Riccardo98 It looks like the Adept Runtime version 2.20.2 supports macOS 10.15 or newer. This is included in WaveForms version 3.15 or newer. Please use WaveForms 3.14.3 until this is solved.