I really like Jameco (the parts have pictures!), and you can email the VP of sales and get an answer! The others are mostly secondary at best as far as I am concerned. Anchor is great with most parts; but a few are much more expensive. Example the 74LS682's. A problem with Anchor is that they only ship Fedx. USPS would be nicer- 2 day delivery to Georgia instead of 4-5 days. Ask for Orville or Alicia if you use Anchor. These two know their parts quite well. I've used their S100 edge connectors with good success. I can look up the part number on the connector if you want it. They also have the Euro type backplane connectors for the SBC N8VEM project, and at a good price.
DigiKey used to be #1 for my designs, but I now find my time is wasted wandering around their web site when I know exactly what I want.
eBbay sometimes comes through with parts, but you have to be careful. So many chips nowadays seem to be obvious pcboard pulls with the leads re-plated with tin. Caveat emptor. Read eBay item descriptions carefully!
Leonard de KS4RN
Personally for me it’s more important to try and capture all parts in one box. By the time you pay shipping for multiple boxes the savings are often minimal. Also some places have minimum orders.
FWIW, I find (on west coast) Jameco the best in terms of one box does all. Unfortunately they have “holes”, for example their resistor networks are limited as are their cable connectors.
Next for me is Mouser. They have most things, it’s just a challenge finding it.
I always seem to come away frustrated with DigiKey, I can just never seem to locate an item using their web site.
For 74xxx chips a phone call/order to http://www.anchor-electronics.com/index.html is fairly quick and reasonable. It’s just you have to phone.
If you are not in a rush and are price sensitive, for 70 & 80’s chips http://www.unicornelectronics.com is great.
For really hard to find/no longer in stock the overseas outfit http://www.utsource.net/ is good.
John Monahan Ph.D
From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of yoda
I guess you don't mind paying a 50% mark up on the parts then - would have been about 10 dollars cheaper from Parallax and they provide great service. Just putting that out here for others that might be on tight budgets.
That could be so, but in this case I avoided the extra shipping cost. I don't normally order much from Parallax.
I'm usually an Atmel/Zilog kind of guy!
Though Parallax is showing no stock of propeller - you should buy from them - you are paying a significant premium for those parts from Jameco.
Well, I finished my Console IO board, programmed it and it is up and running. But not without some problems.
The S100computers web page tells me that the Jameco part numbers for the Propeller chip, the EEPROM, and the PropPlug programming dongle are
2007134 Propeller P8X32A-D40
74843 24C512 EEPROM
2109368 PropPlug dongle
HOWEVER- according to the Jameco website (and their customer service folks), the part numbers for the EEPROM and the dongle are incorrect.
The correct EEPROM part number is 276832, and the dongle part is 2109421.
Be warned- if you get the wrong dongle, the pinout is NOT directly compatible with IO board; its pins read (left to right) RES, TX, RX, GND instead of TX, RX, RES, GND! I was able to make this work by wiring a simple transition with a 4-pin header and jumper wires.
Bottom line is, as with any project, double check that the parts you order are really the correct form, fit and function.
As soon as I get some spare time (what's the part number for that?) I will install the CPM and my S100 system will be ready. I now have the Z80, 4meg RAM, and SMB running with monitor. My ZFDC and IDE boards are checked out and ready, but not tested with CPM yet. This S100 system has been a lot of fun, but not too much of a challenge to bring up.
Leonard de KS4RN