Choose the right JP1/JP1.x interface cable - Read this first

Post by **The Robman** » Mon Dec 01, 2008 10:54 am

I have just updated the first post (with Tommy's input)

nevwdr · Post by **nevwdr** » Sat Mar 07, 2009 6:51 am

Hi Guys,

I am finding it very hard to source a HC74266 for the serial interface, can I use any alternate?

I can obtain the following:

74 HC 00 N
74 HC 02 N
74 HC 04 N
74 HC 08 N
74 HC 123 N
74 HC 14 N
74 HC 154 N
74 HC 164 N
74 HC 175 N
74 HC 193 N
74 HC 238 N
74 HC 240 N
74 HC 244 N
74 HC 245 N
74 HC 32 N
74 HC 373 N
74 HC 374 N
74 HC 390 N RO
74 HC 393 N
74 HC 4040 N
74 HC 4049 N
74 HC 4051 N
74 HC 4060 N
74 HC 4066 N
74 HC 4538 N
74 HC 541 N
74 HC 590 N
74 HC 595 N
74 HC 74 N
74 HC 86 N

Will any of these do?

Tommy Tyler · Post by **Tommy Tyler** » Sat Mar 07, 2009 8:05 am

Sorry, the words "no substitutions" on the schematic mean just that.

Try these sources:
here,
here,
here,
or here.

When you post a request like this it's always a good idea to mention where on the planet you are located.

nevwdr · Post by **nevwdr** » Sat Mar 07, 2009 11:52 am

Oops sorry, added my location now!

I am in the UK, only place easy to get IC's here is place called Maplins, that where the list is from. I'll have to go discrete route instead.

Thanks

Tommy Tyler · Post by **Tommy Tyler** » Sat Mar 07, 2009 12:11 pm

If you would rather go IC, send me your mail address via P.M. and I'll pop one in the post to you.

JLPicard · Post by **JLPicard** » Fri Oct 28, 2011 9:12 pm

It appears as if the 802300 is no longer available from Delcom, they are recommending 802370 as a replacement. Is this the current chip being used in the USB cables being sold?

mdavej · Post by **mdavej** » Fri Oct 28, 2011 9:26 pm

Nope (thank God). Current designs use FTDI chips.

Post by **The Robman** » Sat Oct 29, 2011 9:40 am

Just to clarify, Delcom chips are used in JP1 (EEPROM) cables and FTDI chips are used in JP1 (Flash) cables.

JLPicard · Post by **JLPicard** » Sat Oct 29, 2011 10:40 am

Is there a build PDF that utilizes the FTDI chip that can be downloaded?

NM I answered my own question. "At the present time there is one vendor (Tommy Tyler) selling a JP1.2/3 (flash) interface that plugs directly into a USB port. There are no published DIY instructions or schematics for this type of interface."

3FG · Post by **3FG** » Sat Oct 29, 2011 12:43 pm

If you want to build an interface yourself and have a serial port on your computer, it isn't necessary to use a USB-based system.
Serial interface

JLPicard · Post by **JLPicard** » Sat Oct 29, 2011 12:53 pm

3FG wrote:If you want to build an interface yourself and have a serial port on your computer, it isn't necessary to use a USB-based system.
Serial interface

I did DL that plus the Parallel interface, but unfortunately I have neither on my computer. I will just order a cable from Tommy after his store reopens.

mdavej · Post by **mdavej** » Sat Oct 29, 2011 1:11 pm

You can use a USB-Serial adapter with the serial cable.

Post by **vickyg2003** » Sat Oct 29, 2011 1:16 pm

mdavej wrote:You can use a USB-Serial adapter with the serial cable.

I have better luck with the serial cable with the USB-Serial adapter. I've destroyed two of Tommy's USB cables with heavy use, so I am still using my old serial cable from that prelude built years ago.

hookminor · Post by **hookminor** » Thu Apr 18, 2013 6:30 am

I really want to give the whole JP1 thing a try. The obvious first step is getting a cable.
Although I found the thread about Tommy Tyler's store a little confusing, I am going to presume that the store is closed and Tommy is no longer selling cables.
I have found listings for required parts (FTDI cables and 2x3 housings) on eBay (cannot find any of the parts in any brick and mortar stores), but I have also found a couple of ready-made cables on eBay that are only a few dollars more expensive, and are sold closer to home so it will not take anywhere near as long to get them.
Is there anything that I should be asking the sellers of the ready-made cables on eBay for I purchase?
I was thinking that I should ask the following:

Will the cable work on my Atlas 1056B03 (I believe it's a JP2) and my other Atlas (the exact model is not on the remote, but it's silk-screened with JP1.2 on it)?
Are there any drivers required for the cable to work, and where will I find these drivers, if required?

Anything else I should ask or look out for?
People on this site have been very patient with my questions, and I really appreciate it and look forward to any help with this.

3FG · Post by **3FG** » Thu Apr 18, 2013 9:43 am

I already posted about the concern if cables based on the Prolific chip set will work with JP2 remotes. Also, it's not clear why, but drivers for the Prolific chip set are more finicky than the FTDI drivers, especially with Win7 and presumably Win8.

JP1 Remotes

Choose the right JP1/JP1.x interface cable - Read this first

74HC266