Biography has not been added


's contributions
    • Maxim has introduced a new octal industrial digital input, this one with diagnostics: the MAX22190

    • Jacob In the good old days Intel's philosophy was that design tools like emulators were not cost-sensitive. The early emulators cost many thousands of dollars to go with the expensive development systems. In order to allow the developers access to the internal registers of the 8051, Intel designed a "bond-out" chip specifically for the emulator. This dedicated hardware cost about $300 in 1980 dollars. And if you lived in a country where the currency exchange did not keep track of the US$ it was a significant expense. Aside from the vagaries of static electricity, the bond-out chip suffered from a power up problem. If you powered up the target system before the emulator, the odds were better than even that you needed an new bond-out chip. You learned quickly what not to do, but a power glitch also turn out to be expensive.

    • In a new Idea for Design in Electronics Design September/October 2018 there is an analog implementation of the PWM approach. "Enhanced Circuit Yields Versatile, Efficient Switch-Mode Solenoid/Relay Driver" by W. Stephen Woodward

    • Although low tech in comparison to the possible tools discussed here, you may find the following design idea helpful: "Use Excel To Develop A Traceability Matrix" ( ) Electronic Design does not maintain the Excel file and you can find it here- you may need to register with Dropbox to access it.

    • Unfortunately Cypress has just changed their tech support model. They have adopted the Texas Instruments model where you post your question on a user forum and hope that someone at Cypress will assume ownership of your problem. Hope it works out well although my experience suggests not.

    • I just came across this article (which include audio) taken from the Canadian science radio program called Quirks and Quarks. This article describes how one astronomer "sonified" signals from the Milky Way.

    • Bill Schweber wrote an interesting blog on this topic. Relays Are Great, But There’s No Need to Let Them Waste Power

    • I just saw an article in Electronic Design “What’s the Best Way to Drive a Solenoid?”

    • I was just told about dual coil solenoids. The first coil initiates the coil while the second holds it active. So far as I can tell, the coils are independently driven.

    • Jeff Oh that it were a perfect world and solenoid manufacturers actually cared answering tehnical quetions! I was not given the choice of which solenoid to use and the manfacturer had no tech support and simply referred any query to their distributors, who were just as disinterested to respond. However your reservation is well founded and reinforces my comments just prior to my postscript

    • There is an interesting design idea in EDN. "Encode a remarkable 74 switches with only four IOs using Charlieplexing’s cousin. Add on an LCD interface and save even more." "Encode dozens of buttons with only four lines"

    • There is an Idea for Design that creates the PWM in an analog fashion here "Enhanced Circuit Yields Versatile, Efficient Switch-Mode Solenoid/Relay Driver"

    • Chas56 "We had reels of the stuff everywhere!" I used to use empty cotton reels I got from my mom. And then I would wind the tapes using the stand from a manual grinding wheel. I described my memories in a blog: "How It Was: Programming (and debugging) microprocessors"

    • Sgh798 Thanks for the additions. "Of course AMD got rather distracted by the PC market since then!" As part of that they discontinued some fine peripheral chips like the Am9513 System Timing Controller alternately sourced by Zilog, although I am not sure who was actually the 2nd source. Remember 2nd source-ing?

    • Rallyr Thanks for the additions. I do remember the 64180- I seem to remember a Steve Ciarcia/Circuit Cellar article in Byte about it. NEC was not represented in South Africa and so I never was even able to consider it, even though I did work with the Z80 for a while. The TMS9900- I seem to remember a modern reference to it in the series "Halt and Catch Fire". TI must have had their share of less- than-successful micros. There was also the TMS7000 series. Can anyone think of others?

    • Now that you mention it, I do remember the 2650. I still have a scanned data sheet (see "Preserving Data Books From Yesteryear" ). I never used it, but I am sure I did play with its companion the 2651 the Programmable Communications Interface, competitor to Intel's 8251 although for the life of me, I cannot remember its advantages.

    • Max It always seems to happen- I read an article, think a bit and then dismiss it with- "interesting, but I'll never have to do this." And then the universe bites me in the rear end... I have just been working on my implementation if this and it occurred to me that instead of polling every hour, I just set the alarm for the next DST event. When the alarm is detected I then bump the alarm setting to the next DST event. This avoids the loop back issue in the fallback event. If I ever get to write blogs again, this would certainly be a contender as a topic for one of them.

    • There is now a blog on Planet Analog "Corralling switch and sensor inputs in industrial applications" ( ) It describes two new TI 24 bit parts the TIC12400 and the TIC10024 and