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John Doran's
Technical Hobby
Web Site
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Welcome to
TimeFracture!
Index
Page. |
Here are some of my more
elaborate hobby projects. My ultimate objective is to
include enough detail to allow sufficiently-motivated hobbyists to
duplicate them. I have also included extensive FAQs and general
design notes, which I hope will be useful to hobbyists working on their
own designs. Should you have questions or comments concerning anything on this site, please E-mail me at john.doran@timefracture.org. Click on pictures to get larger/higher-quality images. |
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D16/M
Homebrew Minicomputer This is a general-purpose 16-bit processor designed and built from scratch! It is fabricated from HCMOS MSI and SSI integrated circuits using wire-wrapped construction, and is packaged in a rack-mount chassis. It has a full front panel ("programmer's console") and a plug-in bus for peripheral interfaces and memory. |
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D16/M
Peripherals I have documented all of the D16/M peripherals (such as this Serial/Parallel I/O Module) on a separate page. |
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Homebrew
Carbon Dioxide Laser This electrically-excited flowing-gas laser produces an output of over 25 watts, at 10.6 micrometers in the far infrared. |
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Dual-Discharge
Laser
Current
Regulator This active current source drives gas laser tubes, such as the CO2 laser above, without wasting power in inefficient ballast resistors. It permits rock-stable adjustment of the discharge current with the twist of a calibrated knob! |
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Electronic
Vector
Clock Here is an electronic clock having an "analogue-style" clock-face presentation. It displays the time with vector graphics drawn on a small electrostatic-deflection "scope tube" CRT. |
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Old Time
Radio The chance re-discovery of a favorite childhood book rekindled my interest in this oldest of electronic hobbies. Here are some projects adapted from the book, along with a useful "battery eliminator" power supply for old time radio experimenting. |
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The
TimeFracture Laboratory Here's where I built these projects. Alas, in July of 2007 I moved to significantly smaller quarters, and this installation is no more... Information on the new TimeFracture Laboratory to follow! |
Here are links
to some other interesting technical hobby Web sites. |
Disclaimer: I have made a
significant effort to ensure accuracy, but I cannot warrant that the
information on this site is totally free from errors! Should you
encounter any difficulties, I shall be happy to help resolve them. Warning: Some of these projects are potentially hazardous. I expect anyone attempting them to excercise proper judgment, and to take reasonable safety precautions. |
Copyright TimeFracture
2004 - 2011. Last Revised March 6, 2011 at 1900 MST |