8421 BCD led

An interactive LED, resistor, switch and battery circuit built in the DCACLab online simulator by albert spinosa.

Preview of 8421 BCD led

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

3× Battery
12× Resistor (181 Ω, 179 Ω, 178 Ω, 180 Ω)
12× LED
12× Switch

Tags

Battery Switch Resistor LED

About

By albert spinosa
Saved September 09, 2025 · updated January 15, 2026
882 views
Page: dcaclab.com/circuits/85294-8421-bcd-led

Embed this circuit

<iframe src="https://dcaclab.com/experiments/85294-8421-bcd-led/iframe" width="560" height="410" frameborder="0"></iframe>

Cite: spinosa, a. (2025). 8421 BCD led. DCACLab. https://dcaclab.com/circuits/85294-8421-bcd-led

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