Circuit lab
Build any circuit on the board. Bulbs light exactly as Ohm's law says they should, LEDs only work one way round, fuses blow, motors spin and sensors react to light and heat. Short the battery and see what happens.
Battery:
Resistor:
Drag from dot to dot to lay parts. Tap a switch to flip it, a battery, LED or diode to turn it round, a resistor to change it, a fuse to replace it, a capacitor to empty it.
Current from the battery: 0.96 A. Bulbs: 0.96 A. Brighter means more power (I² × R).
Readings
Tap any part on the board to see its current, voltage and power here.
Surroundings
Try a preset: