[WIP] Add CircuitBuilder activity

[karthik-dev56]

This PR adds the CircuitBuilder activity to Sugarizer.

Fixes #1981

Changes

• Added CircuitBuilder.activity with all required assets, icons, and logic

Status

• Activity loads and runs
• Add palette of running Circuits
• Added show-labels of V and I,Current-flow,Voltage-controller
• Different components are left for designing like : two switches etc..
• Save to Jounal
• Final testing and cleanup

This is a work in progress. Feedback welcome!

[karthik-dev56]

Hey @llaske Please have a look at this when you have a time

[llaske]

That's not fun. It's too scripted : the user must only follow instructions level by level. It's just like a book.
Sugarizer activities should be creative and make users want to play with it.

[karthik-dev56]

Hey @llaske Actually I thought first like a game wise like the kid should know right what he should know I mean like : Bulb and wires how to connect so My idealogy was like that......Any way i willl make more fun way thank you....

[karthik-dev56]

Hey @llaske I have updated the sandbox very well now kid can enjoy playing :

simplescreenrecorder-2026-03-12_19.17.50.mp4

Also This is the basic version I am doing research both on ConnectDots and Circuit builder so kids can enjoy lot and I have raised the PR

[llaske]

That's better.
May be you could add a palette where you could choose some running circuits.

[karthik-dev56]

Hey @llaske Thank you for your feedback by the way nice idea I will try to implement and update you soon

[karthik-dev56]

Hey @llaske I have added simple running circuits section so kids can take there interested palete and make changes and enjoy with their ideas:

simplescreenrecorder-2026-03-16_21.16.03.mp4

[karthik-dev56]

Hey @llaske can u suggest few more ideas if u have time like what more features can we add in this to make it more playful

[karthik-dev56]

Hey @llaske

I have added show V&I Labels and current-flow-direction and Voltage-Control
Its a fun and learning feature kids ca know current flow direction and can have fun on changing voltage and bulb glow changes accordingly

simplescreenrecorder-2026-04-01_21.12.38.mp4

Also u can suggest me some more ideas, your feedback support matters a lot to me

[karthik-dev56]

Hey @llaske
please have a look its important

[karthik-dev56]

Hey @llaske please have a look and say your feedback and suggestion to move forward

[karthik-dev56]

Hey @llaske please have a look at this and give your feedback and suggestions

[karthik-dev56]

Hey @llaske please have a look

[karthik-dev56]

Hey @llaske If you have time please review this also

[Ashutoshx7]

Hy please don't ping mentor over and over again
When he will have time he will get back to your pr

[karthik-dev56]

Hey @llaske really for sorry for messaging u frequently to review my activity when ever u are free u can take look i wont force now

[karthik-dev56]

Hey @llaske

I have added show V&I Labels and current-flow-direction and Voltage-Control Its a fun and learning feature kids ca know current flow direction and can have fun on changing voltage and bulb glow changes accordingly
simplescreenrecorder-2026-04-01_21.12.38.mp4

Also u can suggest me some more ideas, your feedback support matters a lot to me

@llaske can u review this when have time please

[llaske]

@karthik-dev56 following are my remarks. See also the latest comment on the issue where I've described what is expected from this activity.

• Items are not looking good. Plus a light bulb should have a small point at the bottom (the contact) and a metal part around it (the base). It's important to make a difference between these parts. May be we could reuse items in GCompris application (https://invent.kde.org/education/gcompris/-/blob/master/src/activities/analog_electricity/resource . A mention is need in a credit file (CC-BY-SA)
• Icons don't match the items. So for example, icon for battery is very different from the item on the board.
• Icon to remove on item should be the minus icon (see in Labyrinth activity). Icon to remove everything on the board should be the square with a cross (see in Paint activity)
• When you select an item in the toolbar each click will create a new item from this type. It's not user friendly. Plus for this activity the user will not create lot of items of each type. So it's better to avoid selection and just add an item in the board on each click in the toolbar.
• It's not a good idea to use popup to change the voltage. We could just change the voltage on each click on the number. Click on 10V become 1V, click on 1V become 2V, … By the way I'm even not sure changing voltage is interesting.
• The display of "I" label on the board is useless. Also the direction of electricity (yellow arrows) is useless.
• Double click on a wire remove it, I don't think it's a good idea.
• Do not display a message when the board is empty: some users can't read.
• The board is brown with dots. It's better to have a white board like other activities.
• There is a bug in processing parallel circuit, when one wire to one light is removed the light continue to work
• It will be nice too to add items to explore electricity conductivity : Conductors allow current to flow (iron, aluminum, tap water). Insulators block current and protect against electric shock (plastic, wood, fabric, glass).
• Regarding general game play, I suggest to remove completely the ready-to-use templates but use two features to encourage user to experiment:
  -- Medal reward, like in Curriculum activity. Each time the user complete a task expected, a medal is win. The medal could be easy to win (first time a battery is created, first time a link between two components has be done, ...) or more complex (first simple loop, first parallel loop, ...)
  -- Robot: clicking on the robot will help the user to accomplish the next step (like in Flip activity). The Robot is smart, he should suggest the more pertinent item considering the current board and the progress (medals) of the user. Of course, using the help of Robot prevent the user to win a medal on the current board.
  -- On medals screen the user could get a detailed explanation of what should be build to win the medal

[karthik-dev56]

@llaske thank you llaske i will go with this features and research some more if it looks good and discuss with you