Questions tagged [python]
On-topic questions related to Python would include embedded programming, using it as a tool for circuit analysis, or how Python interacts with computational hardware. Questions about libraries, algorithms, syntax, or code optimization should be directed to stackoverflow.com.
209
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3
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How do I plot the DC equivalent of an AC sinusoidal signal in Python?
I want to draw a line that bisects an AC signal as seen in the first picture below. This line should take into consideration any drifts.
So essentially, I have an AC voltage signal over time for 3 ...
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51
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Real-Time Audio Processing
this is my first post on here so I hope I am in the right directory to ask this or if there's another channel I should sent this in, let me know.
Basically, what I am trying to do is use a sound ...
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0
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21
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LSM6DS33 IMU data not behaving as expected
This is my first project using an IMU and I don't know what I am doing wrong.
I am using an LSM6DS33 connected to a Raspberry Pi via I2C. When it is sitting still I would expect the gyro values to not ...
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39
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Can any one help me in writing a code for just out put VCC = 5 V for 120 sec only when there is a trigger signal thee go off all the day? [duplicate]
The red and black colors in the USB Cable all time out put VCC = 5 V and Ground = 0 V , Can any one help me in writing a code for just out put VCC = 5 V for 120 sec only when there is a trigger signal ...
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19
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Data transfer between computer and Fieldfox N9917A using Python VXI-11 library
I accessed my Fieldfox device using the vx-11 library. But now I don't know which commands to access the data with. For example, with the CALC:FEED:MODE AVER command? I use Fieldfox programming guides ...
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1
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56
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0
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1
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96
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What is the data sent by the python-dali library for the commands Turnoff, Turnon, stepup, stepdown, and getstatus to the DALI driver? [closed]
Here is the link to the python-dali library, python-dali library
command description,
The table details are taken by referring -
DALI COMMANDS 1
dali2560/dali.txt
DALI COMMANDS 3
Connections overview
...
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0
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46
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Optimise matrix inversion in python for impedance calculation
To get the impedance profile for a circuit, I am using its admittance (G) and capacitance (C) matrices.
I am using python to compute impedance profile at different frequencies but the issue is that I ...
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1
vote
1
answer
79
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Raspberry Pi Pico W not executing main.py when connected with ammeter
I am trying to measure the current flow of a Raspberry Pi Pico W running simple code that blinks the onboard LED saved as 'main.py'. I have verified this code runs when connected to a) my laptop and b)...
- 23
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0
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21
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How to perform image windowing on the OV5647 CMOS sensor?
I have an Arducam 5MP OV5647 Motorized Focus CMOS camera module (which is the same as a regular 5MP Raspberry Pi Camera, but with a motorized lens for manual focusing).
https://www.arducam.com/...
- 292
3
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1
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93
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Time-varying capacitor generates higher than supply voltage? Capacitor power generators?
I was playing around with electret capacitors, supposedly time-varying capacitors with accordance with sound waves, trying to understand them deeply when I found that I need to model it mathematically,...
- 447
3
votes
1
answer
167
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How does LTSpice solver know the type of the component?
I am doing automation of LTSpice using PyLTSpice library in Python.
I need to know the types of the components in the netlist or in the raw file.
How can I know programmatically that ...
- 292
2
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2
answers
266
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Undesirable dim light of LEDs on 7 segment display
I have a 7 segment display (common cathode) with 2 LEDs in each segment, powered by 12V, each segment controlled with a transistor (NPN) and Raspberry Pi 3.3V GPIO (and 4026 IC). What could be the ...
- 21
3
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1
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117
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JFET Id calculation mismatch in SPICE
I'm simulating the following circuit in PySpice:
simulate this circuit – Schematic created using CircuitLab
In this configuration, the N-JFET is always in saturation mode, as you can see by the ...
- 96
5
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1
answer
222
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Interfacing an old spectrometer with PySerial
I asked this question on the Engineering StackExchange and someone said it might be more appropriate here.
I want to interface an old Shimadzu spectrophotometer (Model UV-1601, manual here) through ...
- 53
2
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1
answer
162
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voltage divider using skrf
I'm trying to use Python skrf's Circuit description and started with a voltage divider but I must be mis-using the library because my attempt does not give a realistic result. The circuit I try to ...
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1
vote
1
answer
124
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How to PID control a 47 Ω, 8 W resistor with a Raspberry Pi and Python?
I have a Raspberry Pi 4B, a 12 V power supply, a 12 V air pump controlled by a MOSFET, a DS18B20 for feedback and a 47 Ω, 8 W resistor that we should somehow heat. Everything up to actually heating ...
- 411
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1
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99
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Unable to clear faults on Monoblock via RS232 command: Need help decoding serial messages with Arduino
I recently purchased an XRB160PN192 Monoblock with a known fault of high voltage (HV) for a low price to use in my graduation project. After reading the user manual, I found that the HV error, along ...
- 21
0
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0
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75
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HC-06 module does not receive data RP Pico
So I have a project that I currenty working on and I am also using the HC-06 module as a part of the communication proccess between the ...
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0
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1
answer
61
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What USB device can I use to check for voltage on or off? [closed]
I am looking for a device (ideally a USB device) which I can use to check automatically if there is some voltage (3.3 V) at an electrical connection.
The idea is to automatically test (with a python ...
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2
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2
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104
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Calculating voltage of a circuit with changing current
I'm taking a class about batteries and circuits, and I'm trying a bunch of practice problems in Python. I'm having trouble solving for the voltage of a battery's circuit:
I am given that, with a ...
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4
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1
answer
198
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FSK Modulation in Python
I am currently writing a script that uses I/Q data to do FSK modulation.
My question is about the FFT plot. I expected to have a peak at 1Hz and 2Hz which are the frequencies that represent binary 0 ...
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2
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2
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77
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python vs matlab? [closed]
What is so special about MATLAB? Why in engineering (especially electrical engineering) hasn't pyhton replaced it?
I was watching a Youtube video regarding MATLAB:
https://www.youtube.com/watch?v=...
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1
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188
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I need help understanding this Python program for reading TDS and pH sensors on a Raspberry Pi 4B
I have a Python program for reading both TDS and pH sensors on a Raspberry Pi 4 and sending the data to the Blynk app.
I have a question about the code:
...
- 3
1
vote
1
answer
387
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FlatCAM 8.994 Beta- Gerber copper layers not shown in Plot Area
I am learning to CNC mill my first PCB. As project to learn it, I have chosen the QuinLED V2.6 PCB, which should have wide enough traces and pads to work as milled board hopefully.
This is what I see ...
- 111
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76
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Demodulation of IQ signals from SDRs
I am writing a Python program for an SDR in which I need to process the signal that the SDR will receive. My problem is that the SDR provides an array of complex values, which is tantamount to using ...
0
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1
answer
113
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Wired ESP8266 Communication
I have been looking for the cheapest/easiest way to get 100 or so different i/o devices to all talk to a "Master." (Sending temp data, receiving motor information) Since i am looking for a ...
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2
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436
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How to read MOXA gate Modbus RTU to Modbus TCP in Python?
I have got some MOXA devices. One of them is an Mgate MB3180. I want to code in a program in Python to read the data using TCP.
I don't know if I have to use a regular "TCP reading" or an &...
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65
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How to determine which I2C commands to execute to arrive at a desired result?
I have successfully established bidirectional communication between a featherS2 board and a Mikroe UART to I2C bridge.
I do this by instantiating the address of an I2C command from page 16 of this ...
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2
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1
answer
489
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How to properly use i2c.writeto_then_readfrom() method
See also follow-up question about i2c addresses
I have this mikroe board wired up to an S2 Feather via the SDA and SCL pins. The ...
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6
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3
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Why am I detecting two I2C addresses on the same board, and why do neither of them appear in the datasheet?
I have this MIKROE board wired up to an S2 Feather via the SDA and SCL pins. The MIKROE board is powered by the Feather via <...
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1
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1
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107
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DMU11 IMU data straight from port with Python
This is my first python project away from learning through textbook exercises.
I have no other experience coding so sorry that the formatting is likely horrendous.
I'm using DMU11 form Silicon Sensing ...
3
votes
1
answer
361
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Interacting with SPICE netlists using PySpice
I am trying to come up with a generic Python program that I can use to simulate different simple electronic circuits. The actual idea is to programmaticaly change parameters and do Montecarlo analyses....
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1
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2
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420
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What is the size of the variables declared as macros in C Programming?
I am currently trying to receive and process serial data from an STM32F401CCU6. I am receiving binary data from the STM over USB and I would like to re-assemble the raw data into what was originally ...
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2
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210
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Stepper motor going 1 step forward and 1 backward [closed]
I am trying to control stepper motors using Raspberry Pi 4 and I am facing an issue with it. I am using L9110 controller, and the stepper motor is made for 12v/0.4A. I have a power supply and ...
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1
vote
1
answer
101
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Problem with GPS old location [closed]
I wrote a GPS driver which sends and reads AT commands. I send the AT+CGPS=1,1 command to get the GPS location and if there is no answer I send ...
- 21
1
vote
1
answer
6k
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PID controller implementation in Python
I'm trying to implement a PID controller for a magnetic field using Python.
The magnetic field needs to be around 800µT. It is generated by two coils powered by a current source (BKprecision XLN3640.)...
- 149
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1
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360
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SCPI for SIGLENT SDG2042X
I have been writing python automating scripts for an O-scope and an AWG. I am having issues sending Arbitrary waveforms to the AWG, the model is Siglent SDG2042X. I have the manual and it has an ...
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1
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397
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SCPI OPC command not working
I am writing a SCPI script in Python for the Siglent SDS1104X-E. I have been banging my head for a few days trying to get this to work. Below is my main py file:
...
- 15
2
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0
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118
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Logging data from High Precision AD/DA board using Raspberry Pi 3B
I have a High Precision AD/DA board from waveshare with Raspberry Pi 3B (running on Raspbian).
However, I can write only 27 samples in 1s in my CSV file. I am using this Python code for writing to a ...
0
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1
answer
244
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Best low-cost microcontroller (that can be programmed using Python) for computer vision? [closed]
I have been researching for many days and haven't found a microcontroller that fits my needs.
I want a microcontroller that:
Is cheap (I want to make this into a product that can be around $20-40)
...
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1
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1
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172
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Raspberry PI4 and RS232 adapter cable: how to send serial commands
I would like to use a Raspberry Pi4 to control a syringe pump [(see datasheet here and in particular the quick start manual on page1)][1]
The connector cables I used are RJ11 from the Pump to RS232 (...
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2
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2
answers
2k
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Solving electrical network in Python
I have a complicated electrical network. I would like to calculate voltage drop across across the network i.e. nodes 2-15, given V1=10 V and V16=0 V. The values of the resistances are known.
Is there ...
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2
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1
answer
239
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Scaling Waveform from LeCroy 4104HD using Python/IEEE488.2
I am automating control of a LeCroy oscilloscope using IEEE488.2 and Python/PyVisa.
It seems like it should be relatively straightforward. I use the WF? command to get the waveform + header, I use the ...
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1
vote
1
answer
206
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SPI transaction weird behavior
Im completely new to this topic so excuse any mistakes I make. I have a MMC5983MA sensor which works well with I2C. However Im having trouble with the SPI protocol. I have all wired up and im trying ...
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1
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97
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Raspberry Pi 3 motor code gives gpio error
I am trying to code a motor using the GPIO pins on a raspberry pi 3 and for some reason, when I run the code, it gives me this error:
GPIO.setup(enable_pin, GPIO.OUT) NameError: name 'enable_pin' is ...
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1
vote
0
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183
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Stepper motor has own encoder, can I connect encoder pins to microcontroller and see feedback?
I am using closed loop stepper motor with motor driver. Here is my driver CS-D808. I am using this with microcontroller.
I want to stop this motor always certain location after 5 to 10 turns. I wrote ...
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1
answer
75
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Restore Image File from an Embedded Linux
I am working a project and I am running python on my SOM module( Variscite DART-6UL ). The libraries installation take too much time that I need. Because of that I want to take an image file after ...
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2
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0
answers
100
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Get alpha-beta plot of Clarke Transform in Python
For a project I'm working on, I want to use the Clarke Transform to detect faults in a power system. To do this, I already wrote a script in Python which returns the sine wave behavior of the Alpha, ...
0
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1
answer
990
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SPI communication problem between Raspberry Pi and STM32
I've spent a couple of days to find answer to my problem. Currently I'm working on a project where an STM32L432KC microcontroller board and a Raspberry Pi 3B need to communicate over SPI. The OS on ...
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