Your power tree, solved as you draw it.
Electronics Architect is a block-diagram editor with a circuit solver behind it. Place sources, regulators and loads, wire them up, and every node shows its voltage, current, loss and efficiency. Change a part and the whole tree updates.
A 5 V rail split between a linear regulator and a buck converter, both making 3.3 V. The solver labels each stage with its input, output and dissipation.
What it does
It is a solver with a drawing surface on top, not a drawing tool with numbers typed in.
Solved as you draw
Voltage, current, loss and efficiency on every node, DC or AC. Change one part and the whole tree updates.
Regulators that behave like their datasheets
Dropout follows load current. Pick a converter type and the solver checks it can actually make the voltage you asked for, and says so when it cannot.
Warnings you would otherwise find on the bench
A supply too weak to hold up its converter. An input filter that rings at its own frequency. A rectifier whose real peak current is several times its average.
Starts at the wall socket, if you want
Transformers, rectifiers, PFC stages, inverters and motors, single or three-phase, sit in the same drawing as the DC rails. A rectifier's input current is solved as the pulse it really is, with the power factor and harmonic check that follow.
Monte Carlo and yield
Run the design across the tolerance and temperature drift of every part. Set the limits it has to meet and get the share of units that would pass.
Real parts, with their origin
Search DigiKey from inside the design, ranked against the operating conditions already on your sheet. Paste a spec sheet and get a part. Every value shows where it came from.
Exports worth handing over
PNG, PDF with a drawing border, BOM, Monte Carlo and derating reports, or all of it bundled into one dossier.
Teams, sharing, and more than one sheet
Cloud saves, share links that expire on their own, team workspaces with roles and revision history, and large designs split across sheets with off-page connectors.
AI, where it helps
Describe what you need in plain English and it draws a first pass you can edit. Ask for a review of a design you have drawn. Values an AI read from a datasheet are marked as such.
Find out how many will pass.
Real parts are never quite as good as their spec sheets. Give the design the limits it has to hit, run it across the tolerance of every part, and read off the share of units that would pass.
The report shows the spread on each node, and exports as CSV or PDF.
Derate against a standard, not a rule of thumb.
Pick NASA GSFC or IPC-9592 and every part is checked against its voltage, current, power and junction-temperature limits under that standard.
The report names the stage that is overstressed, and by how much.
How it works
Draw
Drag sources, regulators and loads onto the sheet and wire them up. Or describe the design and let it draw a first pass.
Read
Every node shows its numbers. Warnings point at the stage that needs attention. When the nominal case looks right, run Monte Carlo and derating.
Hand over
Export the drawing, the BOM and the reports, or share a link with your team or a supplier.
Pricing
Free to start. Pay when you need clean exports, more sheets, or a team.
Free
For students, hobbyists, and trying it out
- check Full design canvas (1 sheet)
- check Unlimited real-time power analysis
- check PNG export (watermarked, 1×)
- check 1 AI design analysis
- check 1 Monte Carlo analysis
- check 3 cloud saves
- remove AI Power Synthesis
- remove Multi-sheet designs
- remove PDF & BOM export
- remove DigiKey part search
- remove Local file save/load
Pro
For working engineers
- Everything in Free, plus:
- check Multi-sheet designs
- check Clean exports (no watermark)
- check Vector PDF & BOM export
- check MC & Derating PDF reports
- check 5 AI Synthesis generations / month
- check 25 AI analyses / month
- check 100 Monte Carlo sims / month
- check 50 revisions per design
- check Unlimited cloud saves
- check Local file save/load
Team
Shared designs for an engineering team
- Everything in Pro, plus:
- check 15 AI Synthesis generations / month
- check 100 AI analyses / month
- check Unlimited Monte Carlo sims
- check 200 revisions per design
- check Multi-sheet PDF export (all sheets)
- check Engineering Dossier export
- check Unrestricted local file sharing
- check Shared team designs: editors save, everyone sees the latest
- check Revision history on every team design (who changed what)
- check Role-based access (Admin / Editor / Viewer)
- check Admin controls & centralized per-seat billing
Articles and calculators
Background on the trade-offs the solver makes for you, and four calculators that need no account.
Articles
- The ROI of power design automation Where the hours go when the power budget lives in Visio and Excel, and what a live solver changes.
-
Being written LDO vs. SMPS for each rail, Monte Carlo for power systems, and designing multi-rail architectures.
Calculators
- Buck converter Inductor and capacitor values from input, output, load and switching frequency, with ripple.
- PCB trace width Minimum trace width per IPC-2221 for a given current and temperature rise, inner and outer layers.
- Resistor divider The cheapest standard-value pair for a tolerance you name, with an error budget and a Monte Carlo yield.
- Passive filter RC, RL, LC and RLC filters with Bode magnitude and phase, fitted to E-series values.
What's new
Everything we have shipped, most recent first.
Connect Claude, Cursor or ChatGPT directly to the tool
Electronics Architect is now an MCP server you can add to an AI assistant by address — paste https://electronics-architect.com/mcp into the client, sign in once, and the tools appear: list the shipped templates, read the design schema, validate and solve a design, run a Monte Carlo, save to the cloud, share and export. The assistant works on the same solver and the same monthly quotas as the editor, and every design it saves lands in My Designs for a person to open and approve. Signing in creates an ordinary API key labelled with the app's name under Account → Developer, where one click revokes it. Pro and Team plans; details at /developers/api.
An API for scripts and AI agents
Pro and Team accounts can now create API keys under Account → Developer and drive the tool from code: validate a design against the published schema, solve it, run a seeded Monte Carlo, save it to the cloud, share it, and export the bill of materials — on the same solver and the same monthly quotas as the editor. Designs an agent saves show up in My Designs, ready for a person to open and review. The reference, with a full worked example in curl, Python and TypeScript, is at /developers/api.
A warning when a supply is too weak to hold up its converter
The simulator now measures how stiff each converter's input supply is and flags the ones sitting close to the point where the design stops working. That includes the coil-and-capacitor filter many designs put on a converter's input, which can be far weaker at its own ringing frequency than its resistance suggests — and it names the damping that would fix it.
Tell the tool what kind of converter you are using
Pick a converter type and the simulator checks whether it can actually make the voltage you asked for — and says so when it cannot.
Mains-powered designs now show the current their rectifier really draws
A rectifier with a smoothing capacitor pulls its current in short, tall pulses rather than a smooth sine. The simulator now works out that pulse for your circuit: the peak current your diodes must survive, the true power factor and distortion your transformer, wiring and fuse must be sized for, and the ripple current the capacitor has to absorb. It also flags when a mains-connected design would fall foul of the European harmonic-current limits.
Team designs now remember who changed what
Anyone on a team with the Editor role can save changes straight back to a shared design. Every save keeps the previous version, records who made it and the note they left, and shows up in the team's activity feed.
Share links that expire on their own
A public link to a design can now be set to run out after a day, a week, a month or three. Send a supplier a power tree for a quote without leaving the door open afterwards. Links you have already made keep working exactly as they do today — expiry is something you choose per link, and the share dialog tells you when an existing one runs out.
Find a real part without leaving your design
Search a part number, or browse the DigiKey catalog, and the brand, package and spec sheet come straight in. We rank live distributor results against the operating conditions already on your sheet, so what floats to the top actually fits, and the filters cut a catalog of millions down to a handful worth reading. It works on both sides of the design too. Look up a microcontroller, FPGA, sensor or memory part and its supply range, running current and sleep current come back filled in, the same way a regulator’s do.
The divider calculator shows its working
Tell it the tolerance you need and it hands back the cheapest standard resistor pair that hits it. Then it breaks down where your error actually comes from. On a typical 12 V to 3.3 V divider the resistors are usually the smallest contributor, well behind supply tolerance and temperature drift. You also get the output impedance your ADC cares about, and if a target isn’t reachable it tells you which change would get you there.
Paste a spec sheet, get a part
Some parts we don’t have yet, and some you can’t share. Paste the text from a spec sheet and we’ll turn it into a component you can use, kept private to your account. If it’s one other engineers would want, a single checkbox offers it up for review.
Know where every number came from
Every spec on a part now shows its origin: checked by hand, confirmed by other engineers, or read off a datasheet by AI. Type over a value yourself and it says that too.
Find out how many will pass
Real parts are never quite as good as their spec sheets. Give us the limits your design has to hit and we’ll estimate what share of units would pass, before you build a board.
Works on tablets
Pinch to zoom, drag to place, tap to inspect. Build or review a design at the bench instead of back at your desk.
Exports worth handing over
Save a design as a crisp image or a print-ready PDF with a proper drawing border. Export your analysis as a report, or bundle the lot into one document to send to a colleague or a client.
Diodes that match their spec sheet
Diodes now behave the way the manufacturer says they will. Pick one from the built-in library, or paste in the numbers from a spec sheet and we’ll work out the rest and tell you how close the match is.
Community-checked part data
If you find a wrong number in our parts database, propose a correction and other users vote on it. Anything still in dispute gets flagged on your design, so bad data can’t quietly slip through.
Share a design, get feedback
Post a working design and ask other engineers what they’d do differently. Replies thread, votes push the best answers up, and the spam gets filtered out for you.
Drag to set efficiency
Shape a converter’s efficiency curve by dragging it, using the same numbers manufacturers publish. The simulation keeps up as you drag, so you see the effect straight away.
Describe it, we’ll draw it
Say what you need in plain English and the AI Generate button builds the design for you. Take it from there yourself, or keep asking for changes.
Spec sheets one click away
Every part you’ve picked links straight to the manufacturer’s spec sheet, right there in the sidebar.
Zener diodes
Zener diodes simulate properly now, with a breakdown voltage you can set and a graph showing how they behave in both directions.
Start at the wall socket
A design no longer has to begin at a DC rail. Transformers, rectifiers, inverters and motors, single or three-phase, sit alongside your DC circuits in the same drawing.
Draw your next power tree here.
Free to start. The demo needs no account.