Search found 41 matches

by Axlen
Sun Jun 12, 2005 12:38 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Yes you're right, if you want exact matching baud rates you could use an USB uC and hook a standard Uart clocked at 25Mhz on it. Or maybe use some fast uC like a scenix to emulate one or find a uC that's got an embedded uart that can be clocked fast enough. You'll have to write device drivers thoug...
by Axlen
Tue Jun 07, 2005 9:14 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Re: Sigh...

I can't find here the F232 chip so I think I can use a TUSB3410, but it isn't as fast as the F232 (up to 921,6 Kbps only). You can get the FTDI chips from Parallax . The bauds that the DC serial port supports are based on a 50Mhz clock. The formulas for determining the baud are in the hardware manu...
by Axlen
Mon Jun 06, 2005 8:00 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Sigh...

I've decided to stop all coders cable development. No excuses, no explanation. Period.
by Axlen
Mon May 02, 2005 10:18 pm
Forum: Hardware Modification and Repair
Topic: I keep popping my red LED's
Replies: 9
Views: 286

The values are right, but is the resistor correct?! What are the color coded bands on the resistor you are trying to use? They should be Orange White Black for a 39 Ohm resistor, Orange Orange Black for 33 Ohm. I'm more concerned about the third band, i.e. the multiplier. A handy tool for the color ...
by Axlen
Fri Apr 29, 2005 8:51 pm
Forum: Hardware Modification and Repair
Topic: I keep popping my red LED's
Replies: 9
Views: 286

Yes, use a resistor. You will need to know what the max current for the LED is then calculate the required resistor: e.g. (Supply Voltage - LED Forward Voltage) -------------------------------------- = Resistor value LED Forward Current You won't be able to get an exact value resistor. A 1/4 Watt re...
by Axlen
Wed Apr 27, 2005 8:04 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

USB-Serial Breakout board from Spark Fun Electronics

FYI Here's a nifty link to little USB-Serial breakout board that could be used as the basis of a DC coders cable for anyone whose interested in building their own. You would be limited to 500K baud, but that's still pretty darn good! Marry this up with the schematics I've already published; add some...
by Axlen
Mon Apr 25, 2005 8:28 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Just a quick update: I've been busy with family activities a lot the past few weeks, but still managed to spend some time learning more about USB and the PIC microcontroller chip. Currently my efforts are in making sure drivers for Windows, Linux, OS/X and BSD will be available. A lot of time has al...
by Axlen
Wed Apr 06, 2005 9:34 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Initial review of USB-Maple based coders cable concept

Well I read through the Maple bus patent and the Maple bus info posted on Marcus's DC programming pages. I think it would be possible to pull off a USB-Maple coders cable but I can't say for sure that the serial throughput would be. I looked the KOS 1.3 maple bus code to try and get a feel for how t...
by Axlen
Fri Apr 01, 2005 7:53 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

oh well, it was worth a try. I guess you could still hook it up to your PC, and have the DC connect to the internet through your PC with the proper DC and PC software right? That would work. A SLIP or PPP type of interface could probably be devised. I think the TCP/IP stack in KOS could support tha...
by Axlen
Fri Apr 01, 2005 7:44 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Log book 31 March 2005

I don't like not being able to run the connection speed at 1.56M baud, therefore I have decided to add an external USART in the form of a second PIC microcontroller. Communications between the two PICs will be via the Serial Peripheral Interface (SPI). It keeps the interface between the chips simple...
by Axlen
Thu Mar 31, 2005 6:17 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

USB USB USB

just a random question here. could you in theory use this cable to connect a DC to a cable/DSL modem and (with the proper homebrew software) connect to the internet? No. This is a down-stream USB device. That is to say it is a device that gets attached to a host most commonly a personal computer. T...
by Axlen
Tue Mar 29, 2005 8:38 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Quick update: I can't get this PIC chip to operate as I originally envisioned with dual clocks. It can do it, but only for low power, low frequency modes. So the maximum baud I've been able to calculate that will be common to both the DC and this USB-Serial device is 781249 and 800000 respectively. ...
by Axlen
Mon Mar 21, 2005 8:07 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

New design in progress

Here's a picture of the basic development setup for the USB coders cable redesign. No USB cable yet since I'm just testing the development environment and getting used to the IDE. These PIC chips are really neat to play with. Sourcing all through-hole parts for this version has been going great so f...
by Axlen
Sun Mar 13, 2005 9:46 am
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Bits and pieces

Don't worry, it seems that Yahoo sent your email to the Junk folder. Don't know why. Anyway, do i send the email to coderscable@etc? And for the redesign, that means you are opening preorders again? If I can get this into an EASY to build format without any surface mount components then I'd conside...
by Axlen
Sun Mar 06, 2005 10:08 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

neoak wrote:I never received... it seems im not in the list, and i did send an email.

500K is better than burning CD-Rs, the normal Coders Cable and the very expensive BBA.
Ack! Really. I will go back and double check the mailbox. Please re-submit.
by Axlen
Sun Mar 06, 2005 10:07 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

I do not like the "band-aid" solution to the USB problem. It's is a poor solution to the problem. Therefore I am going to redesign the USB Coders Cable. The design goals this time a mostly the same with the following addition. No surface mount components. Only through hole parts will be used. This w...
by Axlen
Fri Mar 04, 2005 7:36 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

USB Problem

This is a copy of a message I just sent to my list of interested buyers. Just an FYI to those who might build their own cable. -----Start of message----- I have found a problem with the current design. It appears that the USB interface does not operate reliably when attached to "some" computers. I b...
by Axlen
Tue Mar 01, 2005 6:36 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Coderscables@... is now closed. No more requests for Coders Cables will be accepted. I have orders for about 24 units. These will be the first and the last.

Paul Boese a.k.a. Axlen
by Axlen
Sat Jan 29, 2005 9:32 am
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

Little update...

The cable uses surface mount parts which makes it difficult for some folks to build themselves of course. I have seriously considered making a batch of fifty units, but the cost to do it is pretty steep compared to the stuff of similar complexity in the "consumer" market today. I have seven bare REV...
by Axlen
Sat Jan 15, 2005 1:53 pm
Forum: Hardware Modification and Repair
Topic: USB <-> DC High speed Cable Coders released
Replies: 102
Views: 8467

10 interested buyers in one month

Greetings, It has been about 1 month (15-Dec-2005) since I opened up the coderscable email address for interested parties to respond to. To date 10 individuals have expressed a desire to purchase a USB Coders Cable. Most of these emails arrived in the first two weeks. So far the party who seemed int...