L12 NPN

An interactive LED, transistor, resistor and battery circuit built in the DCACLab online simulator by Chris Kiley.

Preview of L12 NPN

Open in the lab Embed The simulation runs as a demo that pauses after two minutes; open it in the lab to keep going.

What's inside

1× Battery
2× Resistor (220 Ω, 3.3 kΩ)
2× LED
1× Transistor
1× Switch

Tags

Battery Switch Transistor Resistor LED

About

By Chris Kiley
Saved October 29, 2025 · updated January 15, 2026
1,310 views
Page: dcaclab.com/circuits/86062-l12-npn

Embed this circuit

<iframe src="https://dcaclab.com/experiments/86062-l12-npn/iframe" width="560" height="410" frameborder="0"></iframe>

Cite: Kiley, C. (2025). L12 NPN. DCACLab. https://dcaclab.com/circuits/86062-l12-npn

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