The National Grid
Step up, send it, step down — why the pylons carry 400 000 V
Accessibility — Adapt
Theme
Dark navy theme
Colour overlay (Irlen)
Off
Display
Reading ruler
Wider spacing (dyslexia)
Text size
100%
High contrast
Classroom / projector mode
Method checklistLists the four steps along the bottom and ticks them off as you go.
Show the workingAdds P = I²R, worked out with the numbers on screen, under the instruction line.
Outline the partsDraws a dark edge round every building and pylon so it stands out from the landscape.
Coloured ground zonesBlue ground where the electricity is made, amber where it is moved, green where it is used.
Label detailHow much writing floats in the scene. Key words names only the part you are being asked to use.
Key words
Procedure
Buttons onlyAdds a named button for every part, so nothing has to be tapped in the 3D scene.
Motion & colour vision
Show the charge movingThe glowing beads travelling along the cables, the smoke and the heat rising off the wires. Turn off for a still picture.
Reduce motion
Slow animation
Auto-rotate camera
Protanopia
Deuteranopia