For ECE and EEE students
Core electronics prep that finally feels hands-on.
Build and measure circuits in your browser, track down faults, practise core-subject tests and rehearse the technical viva that core companies run.
- Runs in the browser
- Marked by simulation
- ECE and EEE syllabus
- Network theory
- Analog circuits
- Digital circuits
- Signals and systems
- Control systems
- Communication
- Electromagnetics
- Microcontrollers
- VLSI
- Electrical machines
- Power systems
- Power electronics
- Measurements
what core companies test
Prep for the hiring you actually want
Core electronics hiring isn't one exam. Pick the track you're aiming for and practise what those rounds really ask.
Semiconductor and VLSI
Deep technical rounds on how chips are designed and verified.
CMOS, flip-flops, FSMs, timing, op-amps, Verilog, C
Embedded systems
Firmware and hardware together, often with a coding test.
Embedded C, microcontrollers, interrupts, peripherals
Power and core EEE
Equipment makers and utilities testing the core syllabus.
Machines, power systems, power electronics, protection
PSUs and GATE
Long objective papers with negative marking and numericals.
Full syllabus, aptitude, engineering maths
sim lab in your tests
Questions you answer by building, not guessing
Circuit questions run in the same simulator you practise in. Try the fault-finding one below.
Hit the target, however you get there
- Vout = 3.00 V (target 3 V ± 5%)
- Current 0.60 mA (limit 1 mA)
- Parts within rating
everything on the bench
A full electronics lab, in one tab
Try them right here: these are the same tools students use in Sim Lab.
A multimeter you can turn
LiveSwitch modes and read the same divider as voltage, current or resistance.
Voltage across R2
Logic you can click
LiveFlip the inputs, swap the gate, and watch the output and truth table follow.
| A | B | Y |
|---|---|---|
| 0 | 0 | 0 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
Subcircuits and an IC library
LiveWrap any circuit into a reusable block, or drop in ready-made ICs. Open a block to see what's inside.
- 555 timer
- 74HC00 quad NAND
- 4017 decade counter
- Op-amp models
- ROM and RAM
- Dot-matrix display
The rest of the bench
LiveEverything else you'd find on a college lab bench, saved with each project.
- Oscilloscope
Two channels, triggers and cursors.
- Function generator
Sine, square and triangle at any frequency.
- Power supply
Fixed and adjustable rails with current limits.
- Bode plotter
Gain and phase across a frequency sweep.
Verilog: compile, test, see the waveform
COMING SOON · PREVIEWWrite HDL, run a testbench and compare your waveform with the expected one. Here's a preview of how it will work.
core subjects
Tests across your whole syllabus
Objective tests by subject, written in the style of placement and GATE papers, with negative marking and sectional cut-offs where the real exam has them.
- Network theory
- Electronic devices
- Analog circuits
- Digital circuits
- Signals and systems
- Control systems
- Analog and digital communication
- Electromagnetics
- Microprocessors and microcontrollers
- VLSI
- Embedded systems
- Engineering maths
- C programming
Why does an emitter resistor make a BJT amplifier more stable?
If the collector current rises, the drop across RE rises too, which lowers VBE and pulls the current back…
Follow-up: Good. What does that cost you in gain, and how would you get it back?
technical viva
Explain it out loud, like the real panel
The AI interviewer asks core-electronics questions by voice and listens to your answer. Thin reasoning gets a follow-up; a strong answer moves you on.
- Questions across analog, digital, power and embedded
- Natural Indian-English voices
- A report that quotes your answer and shows a stronger one
- Pace and pause metrics so you sound sure of yourself
labs together
Mini projects with your team, in real time
Save circuits as projects, keep versions, and build the same circuit with classmates. Each of you runs the simulation on your own screen.
- Autosave and version history on every project
- Invite teammates as editors or viewers
- Share links for reviews and submissions
- College lab assignments, marked automatically
what's next
More hardware, on the way
Here's what you can use today and what's being built next.
Live now
- Sim Lab with instruments and an IC library
- Circuit and fault-finding questions in tests
- Per-student component values
- Projects, live collaboration and lab assignments
- Technical viva with the AI interviewer
Next
- Circuit diagrams, formulas and numerical answers in questions
- Verilog: compile, run a testbench, see your waveform
- Embedded C with mocked hardware
Later
- A virtual Arduino board, then ARM
- Lab interview round with an AI recruiter
- SPICE, DSP and control problems graded by simulation
Questions
Do I need to install anything?
No. Sim Lab runs in the browser on a laptop or desktop. Nothing to download.
Is this only for ECE?
No. ECE and EEE share network theory, control and electronics, and EEE also gets machines, power systems and power electronics.
How are circuit questions marked?
The simulator runs your circuit and checks the readings the question asks for, such as a voltage, a current or a cut-off frequency. Any design that meets them earns the marks.
Can my college assign lab work?
Yes. Faculty set labs with due dates, students submit from the editor, and the checks mark them. Faculty can review and change any mark.
When is Verilog coming?
It is next on the list after diagrams, formulas and numerical answers. Sign up and we will tell you when it opens.
Build your first circuit in two minutes.
Free to begin. No install, no lab slot needed.
Sim Lab is live