555 timer teardown: inside the world's most popular IC
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Submission timeline
2007–2026
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One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.
First comments on top threads
HN comment orderProbably a coincidence, but 0x555 == 0b010101010101. Just like the flip flop output signal.
There’s also some fantastic videos explaining the inner workings of the 555 timer (from a practical perspective) in this series on building a clock module for a breadboard computer - https://eater.net/8bit/clock
The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.
- Breakout years
- 2
- Total points
- 433
- Total comments
- 83
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking
Every submission
| Date | Title as submitted | By | Points | Comments |
|---|---|---|---|---|
| 2016-02-20 | 555 timer teardown: inside the world's most popular ICFirst breakout · Best thread | dezgeg | 318 | 59 |
| 2020-06-04 | 555 timer teardown: inside the most popular IC (2016)Latest 20+ point return | isleofvoid | 108 | 24 |
| 2021-11-10 | Timer teardown: inside the most popular IC (2016) | guerrilla | 1 | 0 |
| 2025-01-05 | 555 timer teardown: inside the world's most popular IC (2016) | wizardforhire | 6 | 0 |