Tronic Lab

Add parts. Drag a part from the left onto the board. Its metal ends snap onto the dots.

Connect them. Press on any dot or metal end and drag to another dot to lay a wire. Wires follow the grid lines and bend at right angles. Parts whose ends touch the same dot are connected too.

Press ▶ Run. Yellow dots show electricity moving. LEDs and bulbs glow, motors spin, buzzers beep.

Change things. Click a part to rotate, flip, change its value or delete it. Click switches to turn them on and off, and hold buttons down.

Watch for warnings. Volty will tell you about short circuits, loose ends and parts that are facing the wrong way.