08
Doorbell Circuit
Build the classic doorbell: a Push Button (momentary switch) in series with a Bell/Buzzer. The bell sounds only while the button is held — exactly like a real doorbell.
Components Needed
Text Wiring Path
Live → MCB → Push Button → Bell → Neutral
Schematic
Steps
- 1Place Live, Neutral, MCB, a Push Button, and a Bell/Buzzer.
- 2Wire: Live → MCB → Push Button (L-in → L-out) → Bell (L) → Neutral (N).
- 3Press Run.
- 4Click and hold the Push Button — the Bell activates.
- 5Release the button — the Bell stops. That's a momentary circuit.
Key insight
Push Buttons are momentary — they close the circuit only while physically held. A standard switch latches open or closed. This distinction is critical: a latching switch would leave the bell ringing continuously.
⚠ Safety practice
These walkthroughs teach wiring logic in a simulator. Real installation work must be isolated, tested dead, and carried out by a competent person — in the UK, notified under Part P or done by a registered electrician.
Terms used here
Defined in the glossary — each one opens at its own entry.
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