Build a glowing vacuum-tube clock for Notion, a website, or a blog. Choose the tube colors, time format, seconds, date, background, glow, and size.
Preview
Tube color
Time format
Works the same way anywhere embeds are supported — not just Notion.
Pick a tube color, time format, and size above — the preview updates as you go.
Hit "Copy Link." It grabs a URL with all your settings already baked in — nothing else to configure.
In Notion, type /embed, paste the link, and press Enter. It'll appear instantly.
Also works in: Coda, Obsidian Publish, Confluence, or your own site via an <iframe> — anywhere that accepts an embed URL.
Tubes flicker on once when the page loads, dim then overshoot then settle — like real hardware warming up, not a looping gimmick.
Each tube flickers on its own slightly offset rhythm instead of one synchronized pulse — the difference between looking real and looking fake.
The colon ticks in sync with the real second — and stays solid instead of blinking for no reason once seconds are hidden.
Flip the format with one toggle in the builder — no separate widget needed for either style.
The builder and an already-placed embed aren't connected — there's no account behind this, so nothing is saved to sync. Changing settings updates the builder's own preview and its link, not the embed already sitting in your page. Copy the new link and swap it into the Notion block to actually change it.
It's a shortcut back to this builder with your current settings already filled in, since there's no account to save them under. It opens in a new tab and never changes the clock already sitting in your page on its own.
No. There's no login and nothing saved on our end — the link you copy contains all your settings directly, which is the entire mechanism.
No — it works anywhere that accepts an embed URL: Coda, Obsidian Publish, Confluence, or your own site inside an <iframe>.
No. Hours and minutes keep updating every second internally either way — hiding seconds just hides those two tubes, and the colon stops blinking automatically since there's nothing left for it to indicate.