How realistic are the electronic components?

Components are rendered with high-fidelity realistic hardware visuals matching actual maker components: translucent blue SG90 micro servos with rotating horn arms, yellow TT gearmotors with spinning axles, vibrating coin motors, illuminated 16x2 LCD text, addressable glowing NeoPixels, and authentic pinout terminals.

Can I simulate short circuits, blown fuses, and motor rotations?

Yes. Wires simulate real electron physics and Ohm's law. Motors physically spin with RPM speed readouts, buzzers synthesize real acoustic audio, LEDs and NeoPixels illuminate, and fuses blow if current limits are exceeded.

Is this simulator free to use?

Yes, 100% free with unlimited circuits, zero registration, and zero server latency. Everything executes locally in your browser.

Real-Looking Hardware Components & Electronics Sandbox

Virtual Circuit Lab & Electrical Sandbox

Drag and drop authentic physical hardware components: NeoPixel strips, SG90 servos, DC motors, TT gearmotors, coin vibration motors, 16x2 LCDs, 7-segment displays, and buzzers. Connect conductive wires and watch electrons flow in real-time!

100% Free & Client-Side Photorealistic Real Items Electron Flow Animation Web Audio Sound FX

Wire:

Status: OPEN CIRCUIT

Voltage (V): 0.00 V

Current (I): 0.00 A

Resistance (R): ∞ Ω

Power (P): 0.00 W

Tip: Click any circular port terminal to draw wires

Components Catalog

29 Tinkercad Items

Interactive Controls:

• Click any card to place component on the grid.

• Click terminals (colored circles) to stretch conductive wires.

• Tap switch or servo knob on board to interact!

Inspector

Click any component on board to adjust properties & controls

Board Items: 0

Active Wires: 0

Loop Complete: NO

What is the Virtual Circuit Lab & Electrical Sandbox?

The Virtual Circuit Lab & Electrical Sandbox on NexTools is an interactive, browser-based electronics simulator and STEM laboratory. Built to run entirely client-side without plugins or software installations, it gives students, makers, and engineers instant access to real-looking electronics: addressable NeoPixel LED strips, TowerPro SG90 micro servos, TT hobby gearmotors, coin vibration motors, 16x2 alphanumeric LCD screens, 7-segment LED displays, incandescent bulbs, and batteries to master Ohm's Law and Kirchhoff's Laws safely.

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Photorealistic Hardware

Designed with authentic maker components: translucent blue SG90 servo bodies, spinning yellow TT motor shafts, glowing 16x2 blue LCDs, and vibrating coin motors.

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Animated Electron Flow

Moving electron particles illustrate electrical current along conductive wires. The speed of the animation dynamically accelerates with amperes ($I = V/R$).

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Web Audio Sound FX

Native HTML5 Web Audio API synthesizes realistic switch clicks, buzzer alarm pitches, and motor hum frequencies with 0 KB download overhead.

Authentic Components Included

NeoPixel RGB Strip: 8-pixel addressable LED strip showing rainbow light effects when powered.
SG90 Micro Servo: Classic 9g micro servo with rotating white horn arm controllable via potentiometer or test sweep.
Coin Vibration Motor: High-frequency eccentric rotating mass (ERM) motor with dynamic on-screen vibration animation.
Yellow TT Hobby Gearmotor: Dual-shaft DC reduction motor with realistic spinning white output axle and RPM counter.
16x2 Character LCD: HD44780-compatible alphanumeric display with glowing blue backlight and system readout text.
7-Segment Display: Single-digit common-cathode/anode display counting digits with red illuminated LED segments.
9V Heavy-Duty Battery: High-energy DC power source with male/female snap terminals.
Incandescent Filament Bulb: Glows with warm illumination proportional to electrical power ($P = I^2 \times R$).
Toggle Switch & Tactile Push Button: Physical circuit controllers to test closed vs. open loop behavior.
Safety Fuse: Realistic glass cartridge fuse that blows open when current exceeds rating thresholds.

Frequently Asked Questions

Can I test servo angles and motor speeds?

Yes! The SG90 micro servo arm physically rotates from 0° to 180°, the DC motors calculate real-time RPM, and the coin vibration motor physically shakes on your screen when current flows.

How do the NeoPixel and 16x2 LCD displays work?

When you complete a closed circuit with the 9V battery, the NeoPixel strip illuminates with an animated rainbow color sequence, and the 16x2 LCD activates its glowing blue backlight to display real-time voltage and telemetry.

Can I save or export my circuit diagrams?

Yes. Use the Export JSON button to save your entire circuit setup, or click Save Image (PNG) to export a high-resolution schematic screenshot for homework, labs, or reports.

Is this simulator completely free?

Yes, 100% free with no login or software download. Everything operates locally inside your browser with complete privacy.