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Brad
2.6K posts
Brad
@bradthx
Computer Scientist, Electrical Engineer. Loves RF, efficiency, and boating.
Michigan Katılım Şubat 2009
504 Takip Edilen720 Takipçiler
@MehdiHacks I designed a holder and printed it with TPU to hold my swiss army knife with my mini knipex pliers. In my pocket every day.
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@byte_thrasher You only need one digital io pin to do the RC charge / discharge timing.
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ok, now that I've heard some good ideas, suggest regarded ways of achieving this with a single pin - *NO ADC*
avi@byte_thrasher
I want one of my PCBs to be able to report its revision number to the MCU. I can dedicate exactly one pin to this task. What is the cheapest and easiest way to do this? Let's assume 20 revs (lol). First idea that comes to mind is a simple voltage divider. Might be good enough
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I set up the first devices in the new laboratory. The electronics laboratory is now fully air-conditioned. Stable temperatures for calibration. Soon the work tables will be set up. #hp #agilent #keysight #tektronix #rohdeubdschwarz
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@byte_thrasher Do RC charge / discharge timing. Drive pin high to charge, C. Then, time how long it takes to discharge to go low. Adjust RC values per rev.
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I want one of my PCBs to be able to report its revision number to the MCU.
I can dedicate exactly one pin to this task.
What is the cheapest and easiest way to do this? Let's assume 20 revs (lol).
First idea that comes to mind is a simple voltage divider. Might be good enough
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@davepl1968 I used to have some of those boards. I remember they used amd bit slice processors.
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I tested all of my "spare" PDP-11/44 CPU boards (it takes about 8 different boards to make a full CPU). Yellow is bad...
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@BoscoMac The 12th and 13th generation Dell servers are amazing on power usage and are very inexpensive on the used market. I replaced all my old supermicro and older Dell 2950 servers with them a while back. They pay for themselves in terms of a lower electric bill in just a few months.
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@RueNahcMohr Early pentiums were stupid expensive. The DX4-100 was amazing at the time. I waited a year and bought The Cyrix 5x86 instead for a fraction of the price. It was the best option for a socket 3 at the time.
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@RueNahcMohr Even if you didn't hear it, the smell is unmistakable. You would know 😄
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AGAIN.
I'm just sitting in my shop and *bang*
A capacitor explodes. where? I can't tell, I can even smell the darn thing, BUT I CANT WORK OUT WHAT JUST BLEW A CAP!?!?!!?
SRRSLY??? ARG.
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👉👈🤔 so, if my life is just one big crazy distraction...
...what you workin on?
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@RueNahcMohr It's an NEC D70236AGD 16 bit micro. I've located some for around $30. I've also been digging through my parts for one, the Japanese gear uses a lot of nec micros.
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@bradthx I'm asking as I have a lot of old printers that have odd processors on them, if its an 78xx? 87xx?... anyhow I might have one. looks like your firmware is on a ROM :]
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