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Actually, I'm already using the MAX7219, because it does save so much work and there are easily-available libraries to drive it.? The reason I liked the display I'm using is that it's the right size

Mark,?? Can your product handle an 85mm wide display?? Here's what is very popular and inexpensive on ebay.8 digit, bright blue display (unlike the hard to read red displays), with MAX7219 chip to

Hi Mark, They are definitely a cute display.? But they are just about the only kind of display that fits inside the Altoids tin.? Does your product need to be small?? Perhaps before the 1100 are

Mark Moulding wrote: Hi Mark, Aha! So THAT's where they all went! When we designed the badge, I ordered a couple hundred for the VCFMW show and follow-on orders. These were quickly gone; but when I

smmccown@... wrote: I bought them on ebay. No data sheet or manufacturer's name. It's marked 72R02PHIL, date code T9718. Lee Hart -- A designer knows he has achieved perfection not when there

Richard Cini wrote: Thanks Rich, Designing video was "hard" back in the 70s/80s, so there were lots of specialized controller chips for people eager to get something out the door quickly. The

Found this... https://retrocomputing.stackexchange.com/questions/7087/what-video-chips-video-generation-techniques-are-usable-for-the-z80 The 9958 is a weird DIP packaging so maybe the 9918. The

Hi Lee, Do you have a datasheet or part number for the replacement LED display?? I would like to read about it. Thanks, Steve

Lee, I probably caused the availability problem with the original display you were using.? I found that to be a really neat display, so I designed it into a specialized low-volume product I produce

I was thinking in the context of bang-for-buck more so than the Woz kind of challenge. Most video designs I’ve seen (post Don) use a CRTC like the 6845 or something close. I think they need too many

Richard Cini wrote: Of course I can. *Any* modern micro can generate video. For that matter, there are many little boards I can buy that do it all for me. Nothing to design, no software to write. But

Lee -- I know decidedly unvintage, but you can use an ATMEGA88 as a composite color video chip. I use it on my 6502 SBC. It needs an oscillator (16MHz), two resistors, the chip and an RCA jack (or

ajparent1/kb1gmx wrote: Hi Allison, It's alive; just sleepy. Too many distractions, I guess. Let me see... what have I been doing with the Z80MC lately? 1. The 7-digit LED display has become hard to

I attached a picture (not sure if the forum software allows it, but let’s give it a shot). I think there was a thread on this a while ago, but basically it’s two parts. First, a 2000mAH LiPo

Can we have some details here? I did this stuff back in the late 70's and early 80's, but got into appliance computers when the TRS-80 Model 1, Level 1 came out. Something about releasing the magic

Here’s something for the group. One project I did was to make it wireless/portable. I have a LiOH battery, charger board and Bluetooth LE module (all from Adafruit) mounded in a second Altoids box.

comatose, but probably not dead. I just retired again, and I've been too busy to play with anything but SWMBO's Honey Do list. ;) OTH, I did find my copy of? Zaks Intro to Microprocessors. Somewhere

Thump thump.. testing 123 test test... IS there any life or is it dead? Allison

Scott, must ahve better google foo.... http://bitsavers.trailing-edge.com/components/national/scmp/ That is only a sample.? The trick is the 8073 was also called SC/MP-II.? Also helps to try all

Bill: Happy to share and happy to bring back some fond memories for you. The wire wrapping was very tedious and it wasn't just the one INS8073 board. There were three others that were wire-wrapped as