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Anyone play around with electronics?

68gtxman said:
View attachment 742675 i just put together this little C51 clock kit in about 20 minutes. It costs less than $2 and it gave me a great sense of accomplishment on this rainy Sunday afternoon. I’ve assembled about a half dozen kits from infrared relay controller switch to variable voltage power supply. Anyone else play with electronics? Post them up!
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Just don't put that thing in a briefcase! :eek:
 
Sahara said:
That one is a Hallicrafters SW500. I do have a bunch of Heathkit, though. My buddy beat me to a Heathkit 54 at a garage sale a while ago.
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Cool. I have the heathkit one, and also a hallicrafters s-38-c and s-38-e that belonged to my father.
 
I found at an estate sale a Knight (Allied Radio brand) model KG-375A Universal Auto Analyzer that is unbuilt. Every part- including the unopened package of batteries - was there, except the operator and assembly manuals, which I was able to buy. I paid 5 bucks for it!
knight.jpg
 
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Mike Szadaj said:
I found at an estate sale a Knight (Allied Radio brand) model KG-375A Universal Auto Analyzer that is unbuilt. Every part- including the unopened package of batteries - was there, except the operator and assembly manuals, which I was able to buy.View attachment 742934
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@HALIFAXHOPS would get a charge out of that one. Cool stuff.
 
We gut us a bunch of budding "clock boys" here!

I was involved in the design, manufacture, assembly and repair of industrial cameras for my employer.
 
Here is an unusual clock that I built from a kit decades ago as part of a computer electronics course. It shows the time in Binary Coded Decimal. All computers use binary (base 2 as compared to base 10 which we use) as their basic input/output and computational language.
biclock.jpg
 
Here is a car clock I bought from a surplus electronics store. I hooked it up to a 12 volt wart for power and put it in the garage. Just because it's my idea of a cool/unusual thing to have.
floclock.jpg
 
It’s amazing the cool **** that we all have in common.
Looking at the last photo I see many of “my” items.
I have a “500” from a ‘68 Coronet. A bunch from ‘70, also.
I have a bundle of those paper tags just like yours that I use when I fix a customer gun.
I have one of those can/bottle openers that I carry around the world because the kind of beer I drink doesn’t come in twist tops, I don’t drink from cans, and lots of hotels no longer have openers in the room.
 
Not to much at home, tinker with PLC's, photo eyes, proxy switches, etc at work. For the most part it's troubleshooting and replacing parts but do get bored and repair plc cards in my spare time if that counts. I'm definitely more of a metal guy.
 
Helped my dad with out first color tv- Heathkit. Oscilloscope,tube checker also Heathkit. Still remember the little boxes that needed checked off after each step was done. I need to look for my soldering iron!
 
Sahara said:
It’s amazing the cool **** that we all have in common.
Looking at the last photo I see many of “my” items.
I have a “500” from a ‘68 Coronet. A bunch from ‘70, also.
I have a bundle of those paper tags just like yours that I use when I fix a customer gun.
I have one of those can/bottle openers that I carry around the world because the kind of beer I drink doesn’t come in twist tops, I don’t drink from cans, and lots of hotels no longer have openers in the room.
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No vintage key rings?
 
Sahara said:
Back in the late seventies I took computers in college. I was a wiz at Boolean Algebra, the math of BCD.
I wasn’t good at anything else, though...
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The last time that I heard that phrase was when I read a book about “Fuzzy Logic” written by Dr. Latfi Zadeh in the mid 1990s. (Here is a link to his book: https://www.amazon.com/Fuzzy-Logic-...c&qid=1554157153&s=gateway&sr=8-1-spons&psc=1)

He came up with the concept in 1965 and it explained how most machine logic was based on Boolean logic and he proposed an alternative to it which made machine logic emulate the logic used by people (I.e. fuzzy logic). I picked up the book at the public library from the return pile as I waited to check out another selection. The few minutes that I had to read it before checking out the other book was so intriguing that I also checked it out as well. What a fascinating subject it was! Japan adopted his concepts and immediately oversold the consumer products that were based on it. The first was a washing machine, it measured the turbidity of the rinse water to determine if additional washes and or rinses were necessary to clean the clothes. Thus, it reduced water consumption and costs for doing the laundry. It is used in the USA Today, but they don’t call it Fuzzy Logic based because we Americans don’t think that anything “Fuzzy” is better. Dr. Zadeh named it “Fuzzy” just to piss off technical people as they want things to be black or white - I.e Boolean “yes” or “no”.

The concept is exemplified with a typical home thermostat. If the temperature drops below the set point, it turns on the furnace. When the temperature reaches the upper set point, it shuts off the furnace. But the temperature zooms past the set point - resulting in the temperature going above the desired set point. This results in the temperature fluctuating above and below the desired level and wasting energy. A Fuzzy Logic based system would have multiple heat output levels in the furnace, with the thermostat engaging the furnace at a higher heat output level the further away from the set point the temperature became. So if the temperature was only a little below the set point, the lowest temperature producing furnace function would come on. And before the temperature hit the desired level, it would shut off the furnace and let “momentum” carry it to the exact set point. See how this would save energy?

The concept could also be viewed in the following manner. If the answer to the question “is Bryan tall?” just yes or no, then it would be answered differently by people of different heights themselves. Did that invalidate any of their answers? Yes if you are using Boolean logic as the only two possible answers are “yes” or “no”. But Fuzzy logic rates the answer based on the potential for various answers, so that all of them are valid. If 80% of people asked the same question said “Bryan is tall”, then the Fuzzy logic answer is “Bryan is 80% tall”. See how that works? Pretty cool in my opinion!
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I first learned computer programming in the late 1950s when my father the USAF computer programming teacher taught his kids how to develop a program using punch boards and wire jumpers. I then learned in the mid 1970s in college, using FORTRAN and keypunch cards run through the mainframe. Glad those days are long gone!
 
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Slap Stick said:
We gut us a bunch of budding "clock boys" here!

I was involved in the design, manufacture, assembly and repair of industrial cameras for my employer.
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I take that personally, because that jackass all he did was take a clock radio apart and put it into a brief case! Even I know what he did before the news and investigators did. I believe everyone that has posted is way more advanced than that clown!
 
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