Electricity & Circuits (Smart Series, Parallel & Fault-Finder Lab)
Source:
Master circuit design! Build Series and Parallel LED circuits on a magnetic circuit board. Digital current sensors measure current flow (Amps); if one bulb blows out in Series, ALL go dark — but in Parallel, the other stays bright!
Categorisation
Props & Materials Required
- •Modular magnetic circuit board (Batteries, Switches, Bulbs, Buzzers, Resistors)
- •2x ACS712 current sensors (measures series/parallel current flow)
- •Volt meter sensor module
- •ESP32 controller board
- •16x2 LCD display screen
- •DFPlayer Mini MP3 module + 3W speaker
Step-by-Step Instructions
Connect Series Circuit
Connect 2 LED bulbs in Series with a 3V battery switch.
Unscrew Bulb 1 (Simulate Blown Bulb)
Unscrew Bulb 1. Circuit opens! Current drops to 0.0 mA and Bulb 2 goes dark instantly!
Reconnect in Parallel Circuit
Rewire bulbs in Parallel configuration.
Unscrew Bulb 1 in Parallel Mode
Unscrew Bulb 1. Bulb 2 STAYS BRIGHT! Current sensor reads 'Bulb 2 Current: 40 mA'. Speaker explains house wiring parallel design!
Why It Works & Notes
In Series circuits, current has only ONE path (removing one bulb breaks the circuit); in Parallel circuits, current has MULTIPLE paths. Measuring live voltage and current on digital sensors makes electric circuit theory concrete.