Index of /Digital/Interfaces
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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!
If we have any web developers out there, we'd love your help! come on, my birthday's tomorrow!

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? Please let us know what you think, keep vBulletin, or switch to SEO. Comment box is below.

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.

tips to download -
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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.

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!!!

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<-- Old News -->

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Last Accessed Size  File
12-05-17 179136  8088 I O Ports.PDF
12-06-17 830669  8255 Ppi Ibm Interface Card.PDF
11-14-17 15216  AES - EBU a n d SPDIF Digital Audio Interfaces.ZIP
09-03-17 16659  AES-EBU Interface FAQ.ZIP
01-17-18 44163  ARC's RS422  Tutorial & info on converters.mht
01-18-18 83493  Acoustic Coupler Driver.pdf
12-06-17 112544  Adaptec AVA-1502E ISA to SCSI Host Adapter OM.pdf
01-17-18 583  Analog Switch Expands I²C Interface - Maxim.mht
01-17-18 78237  Analog-Input Circuit Serves Any Microcontroller.pdf
01-18-18 20654  CMOS to TTL Interface with the 555.pdf
12-10-17 219456  Capacitance Sensor Interface.pdf
12-06-17 910061  Control Individual Parallel Port Lines
11-21-17 45124
01-17-18 10387  DEBOUNCE BETTER.gif
01-02-18 14325  DEBOUNCE BETTER.jpg
01-19-18 1098  DEBOUNCE.gif
01-03-18 644  DEBOUNCE.jpg
01-04-18 229897  Digital I-O Adapts to Many Interface Voltages.pdf
01-11-18 8676  Driving A Triac From A Pc.gif
12-28-17 38556  Driving A Triac From A Pc.jpg
12-06-17 22607  Driving LEDs from TTL.pdf
12-26-17 866237  Equalization Enhances RS-485 Links.pdf
12-07-17 930577  Experimenters ISA I-O Board.pdf
11-23-17 76386  Extend Ratings of One Wire Swirches.pdf
01-11-18 263030  Fundamentals of RS-232 Serial Communications.xps
12-27-17 478601  Galvanic Isolation for I2C Communications.pdf
01-02-18 26338  I2C - RS-485 adapter.mht
12-28-17 6233  ISA_to_8255_output_port.gif
01-05-18 1727  ISA_to_8255_output_port.jpg
11-22-17 114590  Increase Number of UARTS available from an MCU.pdf
12-23-17 404011  Industrial USB.pdf
12-05-17 91918  Inputing Parallel Data into a uC with one pin.pdf
12-06-17 375423  Interfacing CMOS.pdf
11-23-17 98320  Isolated 4-20 mA Current Loop.pdf
11-16-17 15656  Isolated I2C Interface.pdf
01-11-18 132136  LVDS Serializer-Deserializer Performance over Twisted Pair Cable.pdf
01-17-18 584  Level Translators For SPI™ and I²C Bus Signals - Maxim.mht
01-01-18 853599  Light Pen Information.pdf
12-29-17 64830  Logic to Load Drivers.pdf
12-23-17 505523  Maximizing ESD Immunity in Serial Buses.pdf
11-24-17 349376  Networking Processor Peripherals with I2C.pdf
01-08-18 7841921  PC I-O Breadboard.pdf
11-18-17 2018335
12-02-17 1012617  Parallel Port Interface
01-15-18 243936  Pc I O Interface.GIF
12-24-17 20286  Pc I O Interface.jpg
11-19-17 2018335  Pc
01-07-18 4578  Pcmcia Connector Pinout.txt
11-25-17 76466  Printer Interface Cardco For C64.pdf
01-07-18 54159  Programming Considerations for Real-time IO.mht
01-07-18 530858  RS-485 - Passive failsafe for an idle bus.pdf
01-11-18 22834  RS485, RS232, RS422, RS423, Quick Reference Guide.mht
12-24-17 195886  Roman Numeral Digital Display.pdf
01-18-18 4133  SP-DIF Information.TXT
01-16-18 280517  Selecting and Using RS-232, RS-422, and RS-485 Serial Data Standards.xps
01-14-18 147602  Serial to RS-485 Adapter pcs71id1.jpg
01-18-18 92979  Talk to Multiple Devices with One UART.pdf
01-17-18 288524  Tiny USB to I2C Adapter.xps
01-01-18 704664  USB-2-I2C conversion board schematic AV02-0065EN.pdf
01-15-18 385274  Usb On-The-Go Basics.pdf
01-01-18 332686  Using a PC's RS-232 Serial Port To Communicate with 2-Wire Devices.xps
01-15-18 2314  a translator from 5 to 3V.gif
01-04-18 8315  a translator from 5 to 3V.jpg

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