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honey the codewitch wrote: I strongly encourage folks to code IoT stuff. It forces you to understand the inner workings of all the nonsense you take for granted with coding today.
That's why I did recommend (time ago) to start with automation in PLC or robotics, back then they had way smaller resources and you had to think a bit sometimes to make it faster or even possible.
Current PLCs are not comparable anymore. They can handle very big things and you really have to do things really bad to reach the limits.
M.D.V. 
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
modified 15-Jul-21 10:34am.
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So you just do *more* with it. Push the envelope again. I've got TrueType running on 512kB systems with 300kB available, and it's not uncommon for TTF streams to be north of 200kB
I did it by streaming the data for rendering the font straight from the stream. Then I only malloc temporarily while rendering on a character by character basis. It can probably target machines with far less RAM than 300kB but I haven't tested it on say, an ARM yet.
I also am making an EPUB reader, which ties in Zip file technology, epaper display driver tech, HTML/CSS, XML and JPG+PNG
The zip file portion I'm working on right now. In order to make it work with big books, like decompressed EPUBs with pictures that end up uncompressed to larger than 4MB, I am making the zip engine stream on demand directly from the file so it never has to decompress the zip entirely.
Even then, I need every byte of my 4MB of NVS flash to hold my program code and any scratch data I need to make the epub thing work.
It's serious business, cramming big things into little packages. As the packages get bigger, just get more ambitious with what you cram into it.
Real programmers use butterflies
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honey the codewitch wrote: So you just do *more* with it.
Once thing is willing to try it, another thing is actually doing it.
You might be a bit crazy (your own words), but I just think you are as crazy as a genious need to be, to remain so damned creative and out of the box.
I try to follow many things of what you do, but I actually can't. You are just way ahead of me.
M.D.V.
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
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I appreciate the sentiment, but I'm more tenacious than anything. That and curiosity keeps me going.
I think you can keep up. A lot of the problems I solve are problems that you'd have solved too had you run into them, I swear. You work more than I do though, I bet. I have a lot of disposable time. 
Real programmers use butterflies
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I plan to test some computer parts, but I did not get time to do it.
now my refrigerator did not freeze, so I used it to test defrost heater.
diligent hands rule....
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excellent.
I have used my multimeter on many troubleshooting projects around the house over the years.
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Oh yes.
Checking fuses, batteries, temperature, ... the list goes on.
I have several: two digital (so I can check the batteries in the other - and one has a current clamp the other doesn't) and a pair of Avo 8 analogue meters.
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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but my problem is : I forgot my initial goals: what kinds of computer parts I can check? I liked Dell laptops and desktops.
so I bought lot of stuff from eBay...
diligent hands rule....
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Message Closed
modified 15-May-23 19:07pm.
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Member 14968771 wrote: unplug the faulty module and replace it , throw the bad one away
Cut it in half and throw it away - I learned that with cables decades ago. It you don't, some bugger will fish it out of he bin and it'll come back to haunt you ... 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Member 14968771 wrote: The problem with "cheap" multimeters - the test probes do not last....
Ain't that the truth.
I had a multimeter that I bought in the early 1970s. Of course, from that era, it was still an analog meter with a needle. This is it (at the Radio Museum): Multimeter 200H Equipment Central; where?, build 1973 ??, 3[^]
It lasted me over 40 years but it was the probes that wore out and I found I could buy a cheap new digital multimeter for less than the cost of a new set of probes. That digital meter lasted me 5 or 6 years and then those probes wore out and again it was cheaper to buy a new meter than to get a replacement set of probes.
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Buy a Fluke, they last forever and the leads never break, plus auto shutoff to save the battery. I have 3 different flukes from when I was a data communications contractor, even one to read amperage drawn on power cables because I had an electrical contractors license as well.
I haven't tested a transistor since my Xerox days in the 80's, or Mosfets for car audio amplifiers. Never tested diodes, because most AC to DC converter chip have them built in.
If it ain't broke don't fix it
Discover my world at jkirkerx.com
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One of the more likely failures, in devices that have power supplies, are the electrolytic capacitors in the supply. My ex-boss (I'm retired now) had 2 TVs fail on him and both failures were from the electrolytic capacitors in the supply. He was able to fix both TVs by replacing the capacitors. Normally, the bad capacitors are bulging.
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now I recalled my initial purpose: ![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
diligent hands rule....
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Does it still multi-meet?
Nothing succeeds like a budgie without teeth.
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Indeed, it is a versatile instrument.
"In testa che avete, Signor di Ceprano?"
-- Rigoletto
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Does everyone, (apart from me), have a multimeter?  Why has no-one told me! I'm, obviously, going to get right on it. Ebay or Amazon?
I feel, somehow, that another one of life's opportunities has passed me by.
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5teveH wrote: Does everyone, (apart from me), have a multimeter?
:raises hand:
Perhaps we should start a support group - "Developers without multimeters". We could debate whether to allow developers without voltmeters and/or ammeters to join, too.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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Quote: Does everyone, (apart from me), have a multimeter? Confused | Why has no-one told me! I'm, obviously, going to get right on it. Ebay or Amazon?
I feel, somehow, that another one of life's opportunities has passed me by.
**Raises hand - I've got a few multimeters, a 'scope and a signal generator/logic analyser. Of course, I was pure embedded dev for 15 years or so, so there's that.
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Nah, never found a need for one - you are not alone.
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Just for checking fuses with the ohm meter is worth it.
I have a garage door opener that is out of support and to replace it would require a total rebuild of springs, etc. plus the cost of the new opener.
It had a well designed control board that needed 2 pop-in fuses replaced. $10 versus $400 dollars.
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take notes here
diligent hands rule....
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Any self-respecting person would have one and an oscilloscope if you ask me, the more probes the better.
Regards,
Rob Philpott.
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Hardware stores sell multimeters now. Big box home center stores too.
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Why buy a multimeter? Surely one would have done the job.
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