Index of /Digital/Interfaces
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03/06/2014
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.


09/04/2010
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!
If we have any web developers out there, we'd love your help! come on, my birthday's tomorrow!


12/20/2009
Better forum? -
We are currently using vbulletin, but maybe there's a simpler alternative that would better fit the site. What do you think of this one? http://schematicforums.com/seo/ Please let us know what you think, keep vBulletin, or switch to SEO. Comment box is below.


09/29/2009
ideas or comments?
please send us your comments or suggestions or any ideas you might have for the site. this is the easiest way for you to let us know what you think. just type in the box above and send.

Thank you, everyone who has helped support the site over the years. you've done your part, now help me do my part to improve the site with your input.




11/25/2009
tips to download -
right click on the file you want and save target as/save link as. this will help prevent the system from double counting the bandwidth.
The bandwidth reset time is now set to 20 hours instead of a week. We hope this helps you get what you need without causing any problems with the site.


05/07/2008
new server -
this week, we've moved the website to a bigger faster server. we have doubled the weekly download limit to 20mb and are now allowing hot-linking, so more people can get the documents they're looking for. this new server is still relatively low cost, but is a bit more to pay for each month then the last server. we still need your donations to help with this. thank you all who have supported the site and community!!!


01/24/2008
upload files - upload.schematicsforfree.com If you have files you'd like to add to the site, we'd love to add them. Please don't upload anything illegal, harmful, or copyrighted. We will do our best to screen the files and put them online.


<-- Old News -->


[To Parent Directory]

Last Accessed Size  File
11-12-17 179136  8088 I O Ports.PDF
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11-14-17 15216  AES - EBU a n d SPDIF Digital Audio Interfaces.ZIP
09-03-17 16659  AES-EBU Interface FAQ.ZIP
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11-16-17 78237  Analog-Input Circuit Serves Any Microcontroller.pdf
11-15-17 20654  CMOS to TTL Interface with the 555.pdf
10-26-17 219456  Capacitance Sensor Interface.pdf
11-07-17 910061  Control Individual Parallel Port Lines Directly.zip
11-12-17 45124  Control_Individual_Parallel_Port_Lines_Directly.zip
11-16-17 10387  DEBOUNCE BETTER.gif
11-17-17 14325  DEBOUNCE BETTER.jpg
11-04-17 1098  DEBOUNCE.gif
11-05-17 644  DEBOUNCE.jpg
11-15-17 229897  Digital I-O Adapts to Many Interface Voltages.pdf
11-17-17 8676  Driving A Triac From A Pc.gif
10-31-17 38556  Driving A Triac From A Pc.jpg
11-17-17 22607  Driving LEDs from TTL.pdf
11-15-17 866237  Equalization Enhances RS-485 Links.pdf
11-04-17 930577  Experimenters ISA I-O Board.pdf
11-15-17 76386  Extend Ratings of One Wire Swirches.pdf
11-18-17 263030  Fundamentals of RS-232 Serial Communications.xps
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11-08-17 26338  I2C - RS-485 adapter.mht
11-09-17 6233  ISA_to_8255_output_port.gif
11-19-17 1727  ISA_to_8255_output_port.jpg
11-16-17 114590  Increase Number of UARTS available from an MCU.pdf
11-15-17 404011  Industrial USB.pdf
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11-18-17 375423  Interfacing CMOS.pdf
11-15-17 98320  Isolated 4-20 mA Current Loop.pdf
11-16-17 15656  Isolated I2C Interface.pdf
10-06-17 132136  LVDS Serializer-Deserializer Performance over Twisted Pair Cable.pdf
11-19-17 584  Level Translators For SPI™ and I²C Bus Signals - Maxim.mht
11-04-17 853599  Light Pen Information.pdf
11-19-17 64830  Logic to Load Drivers.pdf
10-22-17 505523  Maximizing ESD Immunity in Serial Buses.pdf
11-15-17 349376  Networking Processor Peripherals with I2C.pdf
09-08-17 295685  PARALLEL_PORT_INTERFACE_BOX.PDF
11-16-17 7841921  PC I-O Breadboard.pdf
11-18-17 2018335  PC_Interfacing.zip
11-17-17 1012617  Parallel Port Interface Collection.zip
11-19-17 243936  Pc I O Interface.GIF
11-19-17 20286  Pc I O Interface.jpg
11-19-17 2018335  Pc Interfacing.zip
11-03-17 4578  Pcmcia Connector Pinout.txt
11-05-17 76466  Printer Interface Cardco For C64.pdf
11-18-17 54159  Programming Considerations for Real-time IO.mht
11-16-17 530858  RS-485 - Passive failsafe for an idle bus.pdf
11-08-17 22834  RS485, RS232, RS422, RS423, Quick Reference Guide.mht
11-15-17 195886  Roman Numeral Digital Display.pdf
11-08-17 280517  Selecting and Using RS-232, RS-422, and RS-485 Serial Data Standards.xps
11-16-17 147602  Serial to RS-485 Adapter pcs71id1.jpg
11-17-17 92979  Talk to Multiple Devices with One UART.pdf
11-07-17 288524  Tiny USB to I2C Adapter.xps
10-23-17 704664  USB-2-I2C conversion board schematic AV02-0065EN.pdf
11-16-17 385274  Usb On-The-Go Basics.pdf
11-03-17 332686  Using a PC's RS-232 Serial Port To Communicate with 2-Wire Devices.xps
11-18-17 2314  a translator from 5 to 3V.gif
11-18-17 8315  a translator from 5 to 3V.jpg

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