LED 2 (orange)

Light, sound & motion blocks

Output blocks turn current into something you can see, hear or feel: an LED lights, a buzzer sounds and a motor spins.

Circuits that use this block

• First buildOne source, two pathsTwo LEDs in parallel, both with the same brightness.
• First buildWhen components line upTwo LEDs in series. Together they need more than 3 V, so neither lights.

Other blocks in this family

• LED 1 (red)Lights only when current flows into the left side (the triangle points the way). Has a 220 Ω resistor built in.
• Active BuzzerMakes its own tone whenever it is powered. Connect + to the left side.
• Passive BuzzerNeeds a changing signal, such as the Melody IC. A transistor makes it louder.
• DC MotorSpins when powered. Swap the polarity (rotate the block) to reverse it.