Timer

An interactive transistor, LED, diode and resistor circuit built in the DCACLab online simulator by Rene Guadarrama.

Preview of Timer

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
6× Resistor (1.01 MΩ, 99.5 Ω, 4.74 kΩ, 4.7 kΩ)
1× Capacitor
1× LED
1× Diode
2× Transistor
1× Switch
Measured with Oscilloscope

Tags

Battery Diode Switch Transistor Oscilloscope Resistor Capacitor LED

About

By Rene Guadarrama
Saved October 06, 2025 · updated January 15, 2026
1,169 views
Page: dcaclab.com/circuits/85647-timer-9

Embed this circuit

<iframe src="https://dcaclab.com/experiments/85647-timer-9/iframe" width="560" height="410" frameborder="0"></iframe>

Cite: Guadarrama, R. (2025). Timer. DCACLab. https://dcaclab.com/circuits/85647-timer-9

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