Yes, I got it last week. A delightful read. Not what I has expected, mostly good general advice and suggestions for anyone building hardware. Not as much 1802-specific material as I was expecting, and

Arthur, I agree that either combination would provide an approximate 1:10 voltage division. My apologies, in my original post I misread one of the silk-screen values.

Mike is correct (thank you, Mike). If you look at the schematic, the 100K and 10K resistors make a voltage divider, insuring that no input to the PIC exceeds its 3.3V limit. greg =====================

Ah, I see. Thank you! Those resistors make a voltage divider, insuring that the incoming RS-232 signal (which could be as high as 25V) never exceeds 3.3V, which is the maximum that the PIC pins can to

Alan, I'm about to build mine. What are the silk screen errors? I didn't see anything about that when I read the article. Thanks, greg

Mike, the datasheet for the Microchip LDO 3.3V regulator shows 1 uF caps, so I'd bet your 2.2 uF caps would be fine, if they're tantalum; I doubt that you'd need 10 uF. Also, I was under the impressio

It's awesome that you're giving the group first shot at this, and it would be great to see this stay within the group; but as I'm sure you know, this is worth a great deal. If it were me and I didn't

Lee, speaking of the VIP II, hopefully everyone has seen Ed Keefe's work at COSMAC VIP II in creating a VIP II... an amazing and fascinating read. I continue to be awed and inspired by the amazing peo

Peter, going to fab with the existing board makes a lot of sense to me; for me, it's always taken a few spins to get it "right"... surprises come up, and good new ideas as well. Nothing like getting a

Fascinating. I ordered a copy of your book from Amazon. Outdated is not a problem; I expect it will be an interesting read.

Hello Mike! No worries, I have all of the elex components except for the crystal, which I'll order asap. I can work around whatever connectors I don't have. The ICSP header brought back memories! Many

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I just received the 5 PCB's that I ordered. Tomorrow morning, I'll send out 3 to the 3 people who each asked for a board; I responded to each of these people via PMs. For the record, I wanted to post

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Since the right brick seems to always have the wrong connector, a common exercise for me is to splice a cable that has the connector I want, to a brick that has the voltage/current/regulation that I w

David, that sounds like a great lesson (and entertaining too)! ====================

Lee, you make good points... why not make things "idiot proof" when possible. You might get a chuckle out of this... I used to teach electronics at the community college level, and occasionally a stud

Allison, makes sense. Thank you. greg

Scott, thank you for that info. I hadn't realized that that TI's 2516 = everyone else's 2716. I read up on the history... fascinating, and what a mess! Oh, while I'm complaining, I wonder whose bright

Oh my gosh Josh, the more you dig, the more you find! This is quite a list. Lots of ways to get bit, for sure!

Lee and others, thank you for this. Something I also ran into this week... 2716's and TMS2716's are totally different beasts... 2716's being single voltage devices, and TMS2716's being 3-voltage devic

Does anyone know why the TMS2532 4X x 8 EPROM has a slightly non-standard pinout (3 pins moved) as compared to the 2732? I'm just curious as to the history of this difference.