Dash abstracts away all of the technologies and protocols required to build an interactive web-based application, and is a simple and effective way to bind a user interface around your Python code. To learn more about Dash, check out our documentation.

dash-daq-iv-tracer uses the graphic elements of Dash DAQ to create an interface for acquiring current-voltage I-V curves with a Keithley 2400 SourceMeter. Try this demo app on the Dash Deployment Server], and read more about the code in our blog post.

I-V curve is a good way to characterize electronic components (diode, transistor or solar cells) and extract their operating properties. It is widely used in electrical engineering and physics. The Keithley 2400 SourceMeter provides precision voltage and current sourcing as well as measurement.

Dash-DAQ is a data acquisition and control package built on top of Plotly's Dash. It comprises a robust set of controls that make it simpler to integrate data acquisition and controls into your Dash applications.

• Single measurement mode: Adjust the value of the source with the knob at the bottom of the graph area and click on the SINGLE MEASURE button, the measured value will be displayed. Repetition of this procedure for different source values will reveal the full IV curve.

• Sweep mode: Set the sweep parameters start, stop and step as well as the timevspent on each step, then click on the button START SWEEP, the result of the sweep will be displayed on the graph. The data is never erased unless the button CLEAR GRAPH is pressed, or if the source type is changed.

• Dark/light theme: Click on theme toggle on top of the page to view dark/light layout.

First create a virtual environment with conda or venv inside a temp folder, then activate it.

virtualenv venv

# Windows
venv\Scripts\activate
# Or Linux
source venv/bin/activate

Clone the git repo, then install the requirements with pip

git clone https://github.com/plotly/dash-sample-apps
cd dash-sample-apps/apps/dash-daq-iv-tracer
pip install -r requirements.txt

Run the app

python demo.py