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2026-10-09
- 170 new manuals added in aes, alinco, bitsavers, b&k, century, collins, dovetron, ebooks, eico, electric-eye, freq-electronics, goodwill, hickok, johnson, kantronics, micronta, military, national, rca, scientific_radio, sencore, sylvania, tennelec, triplett, uniden, and xyz.
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2026-10-21
- New beta site for public review.
Circuits
Files
- 555 Applications - Electronics Now 1992-12.pdf
- 555 Applications.pdf
- 555 Timer Applications.pdf
- 555 Timer Experiments.pdf
- 555 Timer IC Applications.zip
- 8 Track Timer For Recording.pdf
- Appliance Timer Module.pdf
- Basic Digital Stopwatch.pdf
- Build a Digital Timer.pdf
- Calculator Stopwatch Adapter Errata.pdf
- Calculator Stopwatch Errata.pdf
- Calculator Stopwatch with HP-45.pdf
- Calculator Stopwatch.pdf
- Digi Toll - Part 2.pdf
- Digital Countdown Timer.pdf
- Digital Event Timer.pdf
- Digital Stop Clock.pdf
- Digital Stopwatch - ETI.pdf
- Digital Stopwatch Errata PE 1976-02.pdf
- Digital Stopwatch.pdf
- Egg Timer With A Difference.pdf
- Egg-Timer Circuit Diagram.jpg
- Electronic Sandglass.pdf
- Electronic Stopwatch.pdf
- Electronic Timer Improves Welder Performance.pdf
- Electronic Timers - Circa 1945.pdf
- Exposure-Process Timer 662d Part 2 ETI 1984-06.pdf
- Fail Safe Timer.pdf
- Game Timer (2).pdf
- Game Timer.pdf
- IC Interval Timers.pdf
- Incremental Timer (2).pdf
- Incremental Timer.pdf
- Kitchen Timer.pdf
- Light Sensitive Timing Circuit.pdf
- LM122 Timer Applications.pdf
- Long Duration Timer.pdf
- Longer Term Timer.pdf
- Low Cost Appliance Timer.pdf
- Mark Time Indicator.pdf
- Meeting Cost Timer.pdf
- Missing-Pulse Detectors.pdf
- Parking Meter Timer.pdf
- Programmable Appliance Timer Errata ME 1989-02.pdf
- Programmable Appliance Timer.pdf
- Programmable Timer (2).pdf
- Programmable Timer-Counter.pdf
- Programmable Timer.pdf
- Reaction Timer.pdf
- Reading In Bed Limiter.pdf
- Remote Sensing.pdf
- Simple LED Timer.pdf
- Simple Photographic Timer.pdf
- Simple Stopwatch.pdf
- Snooze Type Timer.pdf
- Stopwatch Adapter for Calculators.pdf
- The 555 - A Versatile Timer.pdf
- Time Delay Light Switch.pdf
- Time Delayed Relay.pdf
- Time Switch.ZIP
- Timer for Geyser.pdf
- Timer with Separate Repetition Rate & Duty Cycle Control.pdf
- Timers - Misc.pdf
- Toastmasters Timer.pdf
- Touch Activated Timer.pdf
- Touch Lamp Timer for 220 240V.pdf
- Universal Electronic Timer.pdf
- Universal Process Timer.pdf
- Universal Timer & Stopwatch.pdf
- Using a Calculator as a Stop Watch.pdf
- Using an HP-45 as a Stopwatch.pdf
- Variable Digital Timer.ZIP
Contact and submissions
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Viewers
These viewers may be required to read some manuals in the archive:
- Sumatra PDF (Windows)
- DjView (DjVu)
- WinDjView (Windows, DjVu)
- Adobe Acrobat Reader (PDF)