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

Speaker crossover split

A capacitor protects the tweeter from low frequencies while the woofer handles the lower band.

Low-voltage model

TP1: amp output

TP2: tweeter high-pass

TP3: speaker polarity

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

Interactive build mode

Mini Amplifier 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

Start with an LM386 module or verified breadboard layout.

Wiring focus

Stage 1 of 5

1

amp IC/module

2

audio input

3

volume control

4

speaker output

5

low-volume test

Confirm the package or module pinout before wiring. Audio ICs are not forgiving when reversed.

Keep this as a low-voltage battery project. Do not connect amplifier grounds to unknown mains-powered equipment without isolation knowledge.

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.Speaker impedance suits the amplifier.Volume is down for first test.No DC is present at speaker output before connecting a good speaker.

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.Start with an LM386 module or verified breadboard layout.

2.Connect audio input through a coupling capacitor or module input pins.

3.Wire the volume potentiometer before the amplifier input.

4.Connect an 8 ohm speaker to the output through the recommended output network.

5.Power from a battery and slowly raise volume while listening for distortion.

What you are learning

1.An amplifier uses a small input signal to control a larger output signal.

2.Coupling capacitors pass audio while blocking DC offsets.

3.Speaker impedance affects current draw and heat.

Bench tests

1.Verify supply polarity before inserting the amplifier IC.

2.Touch the input through a capacitor and listen for hum as a basic signal test.

3.Check the IC temperature after a minute at low volume.

Fault finding

1.No sound: check speaker wiring, input ground, and volume pot pins.

2.Loud hum: check grounding and input shielding.

3.Distortion: reduce gain, lower volume, or use a fresh battery.

Upgrades

1.Add a power LED and switch.

2.Build it into a small enclosure.

3.Add tone control or a simple preamp stage.

Project safety