For the longest time, Physics teachers have had to either create circuit diagrams painstakingly using Microsoft Word or using LaTeX. However, recently String.sg shared the work of a primary science teacher Julienne, from Rosyth School, a circuit diagram builder that can be accessed at https://diagrams.string.sg/ This is a very elegant and intuitive way of creating circuit diagrams.
I went ahead and added some more circuit symbols as well as labelling functionality, including the use of Latex for symbol such as $\Omega$.
This app can also be embedded into SLS directly using the URL (https://physicstjc.github.io/sls/circuit-diagram/) as it is whitelisted. This will allow students to create their own circuit diagrams, and export as a png file for submission.