Your schematic looks fine.
Electrace tells you if it actually is.
Assemble your design from functional blocks. Electrace runs deterministic checks on every edit — and every finding names the exact part and shows the arithmetic behind it. No simulation. No black box. Nothing guessed.
A live Electrace design — hover a block to see what it does. And the linter just caught a 24 V brick feeding an 18 V-max regulator, before it shipped.
Other tools stay silent — or just guess.
Electrace is the one that shows you why.
It names the part. It shows the math. It tells you the fix.
This LDO drops 12 V → 3.3 V at 500 mA. That's 4.35 W burning inside a SOT-223 rated for ~2 — it'll cook. Switch to a buck, or budget a heatsink.
Your VBUS loads add up to 2.4 A on a rail you've budgeted for 2. That's 120% — something's browning out or getting hot.
I²C rise time τ ≈ 850 ns — too slow for 400 kHz (the limit is 300). Drop the pull-ups to 2.2 kΩ and you're at ~190 ns.
C4 is in backwards — its + pin is sitting on ground.
The most useful thing a tool can do is tell you when it can't trust its own answer.
We asked Sparky for the standby draw on a battery design — but the design hadn't declared its sleep-state current, so the solver had nothing to measure. A lesser tool would have reported “0 mA” and called it a win. A chatbot would have invented a plausible figure. Sparky did neither.
The standby analysis found no computable always-on draw — meaning either the design truly has no always-on leakage, dividers, or pull-ups, orthe sleep-current declarations aren't detailed enough to calculate it. So the tool can't produce a meaningful battery-life estimate yet. If your MCU sleep current is known, declare it in the block — then standby draw can compute it.
It would rather be honest than impressive — which is exactly why you can believe it when it is impressive.
Build a design and watch it check itself →Build it. Watch it check itself.
Self-explaining blocks
Authored intent, not guesses. Every block says what it does and why.
Drill into anything
Double-click into a block's real schematic — discrete or IC, every part labeled.
Linting, not SPICE
Voltage and current follow every wire — over-voltage, blown budgets, broken isolation, and overloaded connector pins get caught with the where and the why.
Open any block.
Read every part.
The one IC stops being a mystery — you see exactly what surrounds it, and why.
- ✓ A plain-language reason on every part.
- ✓ ANSI or IEC symbols — your choice.
An AI assistant
that doesn't get to guess.
Didn't we just say copilots guess? They do — because nothing checks them. Sparky is different by construction: everything it draws goes through the same deterministic linter as your own work. Every wire resolved, every budget recomputed, every claim checkable.
- ✓ Builds from real, spec'd blocks — with a real BOM, not invented part numbers.
- ✓ When it's wrong, the checker says so. Out loud, on the canvas.
- ✓ Explains every choice in plain language — it's a tutor, not an oracle.
Nothing
forgotten.
Connect net-to-net — 5 V to 5 V, ground to ground. Leave one dangling and Electrace tells you, right there.
Not guessing. Not SPICE.
Not locked in.
Design it. Understand it. Build it.
Electrace is a free, browser-based circuit and PCB design tool built around one idea: you should be able to see inside every circuityou build. Every block carries its real schematic and the reasoning behind every part; the checking engine follows voltage and current through every wire and tells you where — and why — something won't work. Draw the schematic, lay out the board, export to KiCad, order the parts. No simulation setup, no install, no vendor lock-in.
Does Electrace simulate my circuit?
No. Electrace runs deterministic structural checks — typed nets, power budgets, and signal-integrity and isolation rules — not a SPICE simulation. A clean result means the design is structurally sane, not lab-validated.
Is Electrace free?
Yes. The full understand-your-circuit loop is free on the Hobby plan: blocks, live checks, BOM, PCB, and KiCad export. Signal-integrity and isolation analysis are part of Pro.
Can I export to KiCad?
Yes. Electrace exports the netlist and the PCB to KiCad, so it drops into a standard hardware workflow.
How is it different from a normal schematic editor?
Every block explains what it does and why, and the checker shows where and why a problem exists on your actual design — not just that something is wrong.
Do I need to install anything?
No. Electrace runs entirely in your browser.