Drawings are free. Parts are sold. Numbers are limited.
TapeFoundry publishes circuit drawings anyone can copy, and sells the gates to build them. Pick a drawing, buy its parts, tape it out — the parts burn, a circuit mints, and the chain records exactly how many gates it took.
Eleven drawings. 3,450 numbered cards. The first stage of a machine whose last stage is a working CPU.
How a card is made
A drawing
Every design is a real netlist — NAND gates wired into an adder, a decoder, a comparator. Gate counts run from 40 to 2,118. Nothing is decorative.
Its parts
Each gate is a transistor token. A 1,196-gate ALU burns 1,196 parts. Parts are bound to one processor, so a drawing only builds with the parts sold for it.
Burn, mint, record
The parts are destroyed and an ERC-721 circuit is minted with the netlist stored on chain. Its gate count is permanent, and anyone can check it without trusting us.
What we're building
Foundry One — a computer, one circuit at a time.Arithmetic
Adders, multipliers, dividers, comparators. The parts that compute.
live · 11 drawingsMemory
Registers, counters, register files. The parts that remember.
next · drawings in progressControl
Decoders, state machines, timing. The parts that decide.
plannedI/O
Shifters, buffers, bus logic. The parts that talk.
plannedThe Machine
Everything above, wired into one CPU. The reason the series exists.
the goalWhat happens next
Each stage opens at a number.The drawings
All 11 at true scale →Rarity is not assigned. It is the number of gates that actually burned. When a drawing reaches its cap, it closes — the registry will not issue another number.
First editions
the next number is the lowest one leftEvery drawing numbers its cards in order, and a number is never reused. Eight of the eleven have never been stamped — their edition 1 is still open, and there will never be another one.
Buy a card
three confirmations · every amount shown firstPick a drawing and buy one card. The page buys exactly the gates it needs, burns them into a circuit, and stamps its number — three confirmations, and your wallet shows the amount before each one. Once a drawing reaches its cap, no further numbers exist for anyone.
Parts are bound to one processor: the gates you buy only build this house's drawings. The 0.0002 BNB tapeout fee is charged by the protocol, not by this page. The edition stamp costs gas only — the registry holds no funds.
Latest from the foundry
reading the chain…Run a drawing
Every drawing is a real gate-level netlist, and the netlist is public. Flip the inputs and the gates compute in your browser — nothing is sent to a server, no wallet needed.
If you ever want to sell it
Two doors, both already open. Nothing here needs our permission.
TapeOut's circuit market
The protocol has its own market. Two transactions — approve, then list — and the market takes 1% of the sale from you. Buyers there are already inside TapeOut. Change the price or delist whenever you want.
Wrap it for Element
A raw circuit has no metadata, so other marketplaces show a blank card.
Wrapping locks the original and mints TFD with the drawing, the gate
count and the edition number on chain. Unwrap any time — gas only.
The number travels
Editions are bound to the circuit, not to a wallet. Sell it ten times and it is still the same number — anyone can check that on the verify page.
Verify a card
Reads the netlist from a public BNB Chain node and hashes it in your browser. The hash says which drawing it is; the processor address says whether it is ours.
What this is — and what it isn't
Six things worth saying out loud, so you are not finding them out later.
On chain, so far
| Processor | #1400 · 0x5a4eaff589c9e410260a61d658a893876710ba83 |
| Transistors | 0x9039e4cd6ceba37522382eb1ad8076ba38c975dc |
| Circuits | — |
| Editions | 0xb69215ce68792eca5672b49196868369555ea181 · epoch 1 · 50 / 100 / 700 per drawing |
| Parts cap | 12,000,000 · factory capacity, not the edition supply |
| Stamped | — |
| Wrapper | 0xB4A7B988B77Bd7b29E56F42229464a8dD72361bF · TFD · on-chain metadata |
Questions people actually ask
Fourteen answers, grouped the way they get asked — buy, hold, play, sell, verify. The docs go deeper on every one.
Buying
What do I actually own?
A card is an ERC-721 circuit with its netlist on chain. You own the drawing, its edition number, and the NAND gates that were burned to build it — 40 for the shifter, 2,118 for the multiplier. All three are checkable without trusting us.
What does a card cost?
Gates × 0.0000234 BNB, plus a 0.0001 BNB protocol fee, plus the 0.0002 BNB tapeout fee. A 40-gate drawing is 0.001236 BNB; a 2,118-gate drawing is 0.049861 BNB. Gas is extra and goes to the chain, not to us.
Why three transactions?
They are three different contracts: buy the gates, burn them to tape out the circuit, then stamp the edition into the registry. Hiding them behind one button would mean deploying a router that holds your money. We chose the extra signature.
Can I buy all eleven at once?
Yes. One button buys the parts for the whole set, tapes out eleven cards, stamps eleven numbers and claims the set mark: 6,348 gates, 0.150843 BNB all in, 24 confirmations. Stopping halfway leaves you with the cards already stamped — nothing is lost.
Is there a discount, a whitelist or a presale?
No. The price is the gate count times the unit price, fixed when the foundry opened. A discount would break the only claim the project makes: that the number on the card is the number that burned.
Holding and playing
What can I do with a card after I buy it?
Run its netlist in the browser, use it in the daily puzzle, vote when the series reaches 30% sold, and claim the set mark if you hold all eleven. The card is the entry ticket — there is no staking step and nothing else to sign up for.
What is the daily puzzle worth?
The record is the reward — and the season's top ten open Series 02 a day early. It adds a day and a streak to your wallet, and the ceiling is your card's output width: a 4-bit shifter cannot reach a 16-bit number at any price. On a 16-bit day the small cards are not slow — they are excluded.
What do I get for holding all eleven?
A non-transferable set mark, a founding-set listing, a 48-hour window before Series 02 (double the normal holder window), and the right to name one Series 02 drawing.
My card says #7 but the edition is 6/100. Which number is right?
Both, they answer different questions. #7 is the token id on the wrapper — a global counter across every drawing. 6 / 100 is the edition inside its own drawing: the sixth ADD4 card that will ever exist. Token ids run globally, editions run per drawing, so the two drift apart once people wrap and unwrap.
Selling a card
Can I sell it?
Two doors, both open. List on TapeOut's own circuit market (1% fee), or wrap it into
TFD and list on Element or OKX. Unwrapping returns the original circuit
at any time, gas only.
What happens when a drawing sells out?
The registry stops issuing numbers for that drawing — 700 for the main four, 100 for the entry cards, 50 for the 12-bit multiplier. Cards can still be taped out, but they show as unstamped: the circuit runs, the number is gone.
Technical
Someone copied the drawing. Is my card fake?
The drawings are public on purpose — that is the product. A copy runs on a different processor, and the verify page checks the processor address as well as the netlist hash. Same bytes on someone else's processor reads NOT A TAPEFOUNDRY CARD.
Why does the foundry hold 12,000,000 parts?
That number is capacity, not supply. What limits a card is the registry: 3,450 numbers for Series 01, and no more. Parts are how a card is built; numbers are how many exist.
Do I need a special wallet?
Any BNB Chain wallet. Desktop wallets connect directly; on a phone use WalletConnect and scan the code. Once connected the site remembers it until you press Disconnect.