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Show HN: Capacitor Alarm Clock

Hacker News - Sun, 06/14/2026 - 7:19am

I made an alarm clock that blows up capacitors to wake you up.

There are more details on the Github repo but it's made from an esp32-c3 as the microcontroller, with 3 capacitor slots. There are relays on each capacitor slot to put 15v reverse voltage on the capacitor, with 5.1 ohm resistors on each slot for current limiting in case the capacitor shorts out. I also chucked in an SSD1315 OLED to show the time and a menu to configure it, although there's a web UI as well. The esp32 also means you can fetch the time from NTP.

It also functions as a small heater since I used LDOs to step down 15v to 3.3v for the esp32, I was lazy and didn't use a buck converter circuit :)

Comments URL: https://news.ycombinator.com/item?id=48526174

Points: 1

# Comments: 0

Categories: Hacker News

Meta-Harness by Databricks and Neon

Hacker News - Sun, 06/14/2026 - 7:17am
Categories: Hacker News

Cranelift

Hacker News - Sun, 06/14/2026 - 7:10am

Article URL: https://cranelift.dev/

Comments URL: https://news.ycombinator.com/item?id=48526128

Points: 3

# Comments: 0

Categories: Hacker News

Ask HN: Why does Deno Deploy block /wp-content?

Hacker News - Sun, 06/14/2026 - 6:31am

For a website, which I once migrated from WordPress to Deno Deploy, I have a simple redirect in place for any files below /wp-content/. After I discovered that this redirect does not work anymore, I spent several hours searching for a bug in my own code or configuration. The culprit however, as I later found out, is Deno Deploy itself!

Take a look at https://deno.com/wp-content - unsurprisingly it will yield a 404. However, https://deno.com/should-not-exist will yield a different 404. The same applies for https://usefresh.dev/wp-content and presumably for any other website hosted on Deno Deploy.

Does anybody have an idea, why or when this bug might have been introduced?

Comments URL: https://news.ycombinator.com/item?id=48525910

Points: 1

# Comments: 0

Categories: Hacker News

When asking for a date, aim for no

Hacker News - Sun, 06/14/2026 - 6:27am
Categories: Hacker News

Docfai.app is launched Get your 7 day free trial

Hacker News - Sun, 06/14/2026 - 6:14am

Article URL: https://docfai.app/features/

Comments URL: https://news.ycombinator.com/item?id=48525819

Points: 1

# Comments: 1

Categories: Hacker News

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