ElectroLab AI

Safety first, always.

ElectroLab AI teaches theory, low-voltage electronics, and planning concepts. Mains voltage, switchboards, fixed wiring, high-current systems, and legal electrical work must only be performed by licensed electricians where required.

Open Safety Center

Guided visual build

See it, place it, test it, then debug it.

Visual schematic

RC charge timer

The resistor controls how quickly the capacitor voltage rises. Bigger R or C means a slower timing action.

Low-voltage model

TP1: supply

TP2: capacitor voltage

TP3: trigger/output

Power low-voltage projects from batteries or current-limited supplies first. Stop if a part heats, smells, sparks, or behaves unexpectedly.

Interactive build mode

LED Flasher step-by-step

Move one build action at a time. Treat each step as a checkpoint before adding the next connection.

Progress

1 / 5

Current action

Place the 555 timer across the breadboard gap and identify pin 1.

Wiring focus

Stage 1 of 5

1

555 timer

2

supply rails

3

timing network

4

LED output

5

first power-up

Pin 1 orientation matters. If the 555 is rotated, every other connection becomes wrong.

Use a battery or current-limited low-voltage supply only. Do not connect this breadboard circuit to mains.

Project test bench

Pre-flight, first power, and fault response.

Treat this like the bench checklist beside the project. Tick what is proven, then use the symptom picker if the circuit does not behave.

Readiness

0%

Do not power this yet

Pre-flight checks

Power source voltage matches the project parts.Positive and negative rails are identified and not swapped.Polarized parts have been checked before power-up.A current limit, fuse, resistor, or safe supply protects the first test.Meter is set to the correct mode before touching probes to the circuit.555 pin 1 orientation is correct.LED has a series resistor.Timing capacitor polarity/rating is correct.

Before power

Measure supply polarity and expected voltage at the rails.

During first power

Use current limiting and watch for heat, dimming, or voltage collapse.

After a fault

Power off, isolate one section, then measure from source toward load.

Build steps

1.Place the 555 timer across the breadboard gap and identify pin 1.

2.Wire the low-voltage supply rails and add a 100 nF decoupling capacitor.

3.Add the timing resistors and capacitor between pins 2, 6, and 7.

4.Connect the LED with a current-limiting resistor from the output pin.

5.Power from a battery or current-limited bench supply and observe the flash rate.

What you are learning

1.The timing capacitor charges and discharges between threshold levels.

2.Changing resistance or capacitance changes the flash rate.

3.The LED resistor limits current and protects the LED.

Bench tests

1.Check LED polarity before powering.

2.Measure battery voltage and 555 supply voltage.

3.Try a larger capacitor and confirm the flash slows down.

Fault finding

1.LED never lights: check LED polarity, output pin, and supply rails.

2.LED stays on: check pins 2 and 6 are linked correctly.

3.Timer gets hot: disconnect power and check for a wiring short.

Upgrades

1.Add a potentiometer for adjustable flash rate.

2.Drive two LEDs in alternate colours.

3.Use a transistor to switch a larger low-voltage load.

Project safety