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John Lyon-Smith
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---
tags:
- resource
created: 2026-01-03 12:21
---
## Summary
The 555 timer is a common chip used in the construction of timer circuits.
## Notes
## References
- [555 Adjustable Delay on Off Timer Circuit : 8 Steps - Instructables](https://www.instructables.com/555-Adjustable-Delay-on-Off-Timer-Circuit)
- [The 555 Timer IC Lecture](https://www.me.psu.edu/cimbala/me345/Lectures/The_555_Timer_IC.pdf)