BUILD CARD · EASY

Slide Switch LED

Build a white LED circuit that turns on when you close the slide switch.

Learning goals

Build and check a 10×7 snap-grid circuit from a visual diagram.
A slide switch stores its open or closed state and controls the complete LED current path.

FINAL CIRCUITBOARD 10×7

02 / PARTS CHECK

Parts list

03 / ASSEMBLY

1
Disconnect the battery and clear the base grid before placing any part.
2
Match the final diagram one grid position at a time, placing connecting wires and lower layers first.
3
Check the direction of every LED, diode, transistor, battery, and other terminal-sensitive part.
4
Press every shared snap firmly, check that no wire shorts the battery, then connect power last.

04 / FIELD NOTES

The resistor limits current to protect the LED.

Closing the slide switch completes the loop and lets current flow through the LED.

An LED is polarity-sensitive, so its direction matters.

THE IDEAA slide switch stores its open or closed state and controls the complete LED current path.

05 / TEST

What to do: Move the slide switch to closed, observe the LED, then return it to open.
What to expect: The LED follows the stored switch position and remains on until the switch is opened.

06 / SAFETY

07 / TROUBLESHOOTING

08 / FREQUENTLY ASKED QUESTIONS

What is the main idea behind this circuit?

A slide switch stores its open or closed state and controls the complete LED current path.

What should I check first if it does not work?

Reverse the LED if it does not light.