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Still online, we are. The code for this website is getting old, but still works well as far as I've seen. I may update it with new code and new features eventually, one day when I have both free time and focus. Until then, the content is still useful, I'm keeping it online. Comments and donations are welcome, but include your email address if you want a reply.

Ideas for the future of the site -
Here are some ideas I've been brainstorming. I don't think to much of the site should change, because it has been successful all these years with very little change. still nearly 1000 visitors a day to the site!
  • donations - I think it might be time to make some changes to the donations. I would rather see people get a lifetime membership and not have to worry about an expire date. here's an idea, a smaller recurring payment monthly, or 4 times a year, then maybe offer a second option, donate enough to cover the cost of the server for one month and you'll get a lifetime membership that never expires.
  • automated account creation - the membership process should be automated. I rarely hear a complaint about anything, but I don't think people feel so safe emailing me a username and password to set up an account. I think people may feel more safe dealing with an automated system. make a donation, then type your account into right in to the computer and have it set up on the spot.
  • members only forum - the site doesn't seem to need a full forum, but it could still benefit from a single simple board or mailing list, maybe. still optional, but maybe only available to members. non-members wouldn't be able to post on or see the forum. for those who donate to openly communicate.
You can send me your comments in the form above. I'm not putting any work into these changes without getting feedback from you!
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new server -
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 Circuits using LEDs
 Optically Controlled Circuits

Last Accessed Size  File
01-19-21 1734148  An Introduction to LED Capabilities.pdf
01-21-21 147187  Application Notes—Analog Optical Isolators.pdf
01-18-21 722727  Assorted Opto Electronic
01-18-21 30026  Audible Light Sensor.pdf
01-18-21 269357  Construct a 2 Way Optoisolator.pdf
01-18-21 304587  Detecting UV, IR & Visible Light Part 2.pdf
01-18-21 408718  Experimenting with LEDs.pdf
01-18-21 80998  Fast Response Phototransistor.pdf
01-18-21 146129  Getting to Know LCDs Errata PE 1975-04.pdf
01-20-21 4753  IR Repeater.gif
01-18-21 19897749  Image Processing in Tomography.pdf
01-18-21 40251  Ir Related Ascii Schematics.PDF
01-18-21 171057  LED Lamp.pdf
01-22-21 40784  Light Into Sound.gif
01-18-21 20585  Light Meter.pdf
01-18-21 8801283  Misc Optical Stuff 1.pdf
01-18-21 8912801  Misc Optical Stuff 2.pdf
01-18-21 2119871  Misc Optical Stuff 3.pdf
01-18-21 87452  Nulling out ambient lighting in a photodetector.pdf
01-18-21 34321  Optical Power Meter.pdf
01-18-21 2267246  Optical Signal Isolator.pdf
01-19-21 162169  Optical Triangulation Errata EK 2009-02.pdf
01-18-21 4484372  Opto Isolation.pdf
01-18-21 826229  Optoelectronics Circards.pdf
01-18-21 19685518  Organic Light Emitting Diode - Material Process and Devices.pdf
01-23-21 3328569  Photo Tachometer ETI 555 1978-11.pdf
01-23-21 455245  Photo tachometer adapter for frequency counters.pdf
01-18-21 40123676  Photodiodes - World Activities in 2011.pdf
01-18-21 309830  Photoelectric Sensor that can count entries and exits.pdf
01-18-21 1020456  Sensitive Light Meter.pdf
01-18-21 41874  Signal Averaging Circuit.pdf
01-18-21 311494  The Optical Spectrum.pdf
01-18-21 455637  Tube Based Optical Switch.pdf
01-18-21 40584  Typical Opto Electronic Circuits.pdf
01-18-21 123195  WaterMark Detector.pdf
01-18-21 2177231  Working with Semiconductor Lasers.pdf

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