Stages

11-2Heat and DropoutMake 5 V at 0.5 A from a car's 12 V system—both at 6 V while cranking the engine and at 14 V while driving

Power off

Parts

  • Regulator (pick a part and heatsink) (choose one)1/1 left

Goals

  • U1 gets 5 V at 14 V (while driving)
  • U1 gets 5 V at 6 V (while cranking)

Rules

  • Don't let the regulator overheat (150 °C max)
  • Don't put more than 6.0 V on U1
  • No short circuits
Car battery12VLoad U1−+GNDVCC

Selected

Press a terminal (the small ◯) to start a wire. Press where you want to bend to place corners, and finish on another terminal or on a wire. Press the middle of a wire and then somewhere else to draw a branch from there. You can drag parts and wires to move them. When you are ready, press "Run!" to turn on the power, and try the switches while it is on.

Line mode

Keys

W
Draw wire
R
Rotate
M
Move
G
Drag
Del
Delete
⌘Z
Undo
⌘⇧Z
Redo
Enter
Run
Home
Fit
H
Hint

Wheel to zoom, right-drag to pan