Also, I have 4 boxes full of scrap board to '"process", and it's pointless salvaging components from them all, unless I have an inventory system to process and store them.
Is it proper TEA if you make it yourself?
Is it proper TEA if you make it yourself?Depends what you mean by "proper".
For me, I would ask: Is it Equipment used for Testing (in any sense)?
Your answer to that would be my answer to your question.
Either that, or I will steal whatever components and/or TE that I like in your lab, could get expensive as I don't know what's in your lab !
As for school, my equivalent was biology lessons when the teacher had acquired a large bag of dead mice from a local lab. Everybody did dissection, being warned not to puncture the bladder. Most succeeded.
Also, I have 4 boxes full of scrap board to '"process", and it's pointless salvaging components from them all, unless I have an inventory system to process and store them.
My preference is to not "process" any board, but rather to keep them intact until you actually want a component off it. There are a few reasons...
1. Not spending time removing components only to never use them
2. Avoids the risk of losing/misplacing a component. A board is harder to lose.
3. Components on a board are generally better protected - both electrically and physically (after all, they survived how long?)
4. You have an example of an actual circuit (which may be helpful)
5. If a real-world use of a component needs other components to support its function, then you will likely have them ... right next to it!
6. If you have a need for a circuit, you may be able to tap into one already built!
Of course, there are times when the particular population of a board doesn't contain much of interest, so removing what is and discarding the rest would be sensible. I have done that. The same can be said for removing bulky appendages that would make for inefficient use of storage - heatsinks being a classic example. (I have to admit to being a bit of a heatsink tragic here. In my younger days, heatsinks were not particularly plentiful and chassis panels often performed that role - which aren't particularly easy to recycle. As such, if I see one that looks half decent, I have to "save" it )
Of course, you can still catalogue the components of interest - but this is an exercise I have never been enticed into and at this stage in life, I cannot see me starting.
Either that, or I will steal whatever components and/or TE that I like in your lab, could get expensive as I don't know what's in your lab !
We have Roquefort too
Lab picture is a bit old, there's been a Keithley 6500 added since then. But you can't have any of it!
McBryce.
BRIDGES !
Have a few of those as well, 33 it looks like. A bit a of everything size and package wise.... some small 4 and 6 pin DIP, small round ones, TO220, big SIL packages, and one big square.They'll all be double diodes right, so technically not a bridge.
How do you know it's not a bridge ?
The pins are identified like a bridge would : an ' AC ' symbol on two pins, and a ' - - negative polarity symbol one the last pin. All my dual diodes were marked clearly with actual diode looking symbols, not polarity symbols. So when I hastily sorted these bridges earlier this year, as a first pass trying to sort through all my components, I based my judgement on that. I figured the missing ' + ' pin would just be connected to the metal and that's it.
OK just buzzed it, turns out it 's not. Metal tab is not the positive, it's connected to the negative pin... so it's indeed a dual diode not a bridge, but it could have been a bridge, technically.. you just had no way to be 100% sure.... so sorry but I don't count that as win for you, merely luck.
All 10 of them, are identical it turns out. Al marked " S5KC20R ".
Couldn't find a datasheet for it, only an old scanned catalog page from some chinese company : " SHINDENGEN Semiconductor ". Never heard of them ? Well now thanks to me, you have !
That page also shows an interesting product of theirs, that they named, I quote : " SIDAC bit-directional diode thyristor ".
I don't know what a SIDAC is, and I don't see how it can be a dual diode and a thyristor at the same time. I guess I am just too ignorant again... why don't all manufacturers make this wonderful product...
OK so I shall be adding them to diode inventory then, I guess.... So they are 200V 5A 300ns fast recovery diodes.
Problem, with any dual diode : for some of them the datasheet says they are rated, say, at 20A... then somewhere else they will say no it's just marketing BS. 20A is the "total" current... but each diode can only take 10A.
So the problem is that now, it casts a doubt of shadow on EVERY other diode. Most of them don't state if the current they specify is for one individual diode, or the total current for both diodes combined...
So in fact you just can never be 100% sure what current your freaking dual diodes can really take !!
Sometimes I hate datasheets !!! They are supposed to help you understand what the device can do... NOT add CONFUSION instead !
In the US, land of backwards, union telco techs still lace. It is not permitted to have cable ties on overhead raceway, because the metal tabs will fall down and short the Strowger.
Not true. All the CAT 5/6 cabling in the IBM Systems Test Area is cable tie.
Early Tek's were lace. Later Tek's combo lace/plastic. IBM S/360 Idiot Light Consoles were lace.
In the US, land of backwards, union telco techs still lace. It is not permitted to have cable ties on overhead raceway, because the metal tabs will fall down and short the Strowger.
Not true. All the CAT 5/6 cabling in the IBM Systems Test Area is cable tie.
Early Tek's were lace. Later Tek's combo lace/plastic. IBM S/360 Idiot Light Consoles were lace.
Nowadaze of course SOP in the IDF/MDF is Velcro ties because:
A) you can buy on a roll
2) you can undo and redo to move a cable
but mostly because:
C) Wage-slave cable monkeys will pull a zip-tie tight enough to damage CAT5/6/7 etc... Velcro prevents that.
Obviously the overheads and raceways with bundles as big as my waist will need something a wee bit more substantial, but thankfully, that's usually not my problem.
mnem
moo.
Either that, or I will steal whatever components and/or TE that I like in your lab, could get expensive as I don't know what's in your lab !
We have Roquefort too
Lab picture is a bit old, there's been a Keithley 6500 added since then. But you can't have any of it!
McBryce.
Well if I can't have any of it then it means you posted with the sole intention to TORTURE ME ?!
That's not very nice of you is it....
I will send a commando at night to steal at least the DC electronic load from your lab.
You don't need that to test your 9V batteries, a quick DMM check is more than enough !
...I can confirm that you can indeed disappear a chocolate orange before the police get there. I've watched my ex wife nosh a whole one in ten minutes washed down by some full fat coke and a couple of metformin. (I can hear the groans from med already)I've done some stupid shit with food/carbs but not THAT stupid.
My Keysight LCR meter has gone awol. Apparently lost in move, along with some other stuff. Will intensify search and issue a BOLO.Issue a Bolo? This one?
In the US, land of backwards, union telco techs still lace. It is not permitted to have cable ties on overhead raceway, because the metal tabs will fall down and short the Strowger.
Not true. All the CAT 5/6 cabling in the IBM Systems Test Area is cable tie.
Early Tek's were lace. Later Tek's combo lace/plastic. IBM S/360 Idiot Light Consoles were lace.
Nowadaze of course SOP in the IDF/MDF is Velcro ties because:
A) you can buy on a roll
2) you can undo and redo to move a cable
but mostly because:
C) Wage-slave cable monkeys will pull a zip-tie tight enough to damage CAT5/6/7 etc... Velcro prevents that.
Obviously the overheads and raceways with bundles as big as my waist will need something a wee bit more substantial, but thankfully, that's usually not my problem.
mnem
moo.
Velcro is indeed the cable retention of choice in IBM Z Series for ease of maintenance.
As for school, my equivalent was biology lessons when the teacher had acquired a large bag of dead mice from a local lab. Everybody did dissection, being warned not to puncture the bladder. Most succeeded.We had just a peek at Biology in Science where our teacher while a nice guy was a bit of a whimp and asked us country kids to bring in a rabbit or possum for dissection.
Tautech wanting to be the he man provided the possum in short order no worries thinking said whimpy teacher would do a Biology lessen with it but no, the whimp said I was to do it FFS !
Subject.....but headshot.....protected in downunder beanflying territory.
Well dunno what came over me but an unstrung and intact loop of possum intestine was long enough to run 2 benches back and right across the lab and back to the front bench.
When I noticed all the nice gals had vacated the class and were almost heaving outside I knew I'd overstepped the bounds of teenage decency and anything wearing a skirt thereafter gave me a wide berth.
The dumb shit we do at school.......
I also ate a tofu burrito yesterday. Don't recommend that. Tasted great however it clearly inflamed the gut flora which are now making a stinky protest. At least it wasn't a taco bell one...
Also, I have 4 boxes full of scrap board to '"process", and it's pointless salvaging components from them all, unless I have an inventory system to process and store them.
My preference is to not "process" any board, but rather to keep them intact until you actually want a component off it. There are a few reasons...
1. Not spending time removing components only to never use them
2. Avoids the risk of losing/misplacing a component. A board is harder to lose.
3. Components on a board are generally better protected - both electrically and physically (after all, they survived how long?)
4. You have an example of an actual circuit (which may be helpful)
5. If a real-world use of a component needs other components to support its function, then you will likely have them ... right next to it!
6. If you have a need for a circuit, you may be able to tap into one already built!
Of course, there are times when the particular population of a board doesn't contain much of interest, so removing what is and discarding the rest would be sensible. I have done that. The same can be said for removing bulky appendages that would make for inefficient use of storage - heatsinks being a classic example. (I have to admit to being a bit of a heatsink tragic here. In my younger days, heatsinks were not particularly plentiful and chassis panels often performed that role - which aren't particularly easy to recycle. As such, if I see one that looks half decent, I have to "save" it )
Of course, you can still catalogue the components of interest - but this is an exercise I have never been enticed into and at this stage in life, I cannot see me starting.
*looks over at 3/4 empty bag of Father's Day Reese's* Ugghhh... *blerk*
I'm now in the market for an N connector dust cap, cables, adapters, attenuators, and a signal generator that goes up to 500MHz or so.
As for pheasant, I got put off that fairly early on. My art teacher at school found a very dead one maggot infested on the way to school on his bike, threw it in a sainsburys bag and hung it up in the class room for us to draw and paint under "still life". I can still smell it 30 years later
I also ate a tofu burrito yesterday. Don't recommend that. Tasted great however it clearly inflamed the gut flora which are now making a stinky protest. At least it wasn't a taco bell one...
For some people, that's half the fun!
Fried tofu is good though, and mapo tofu is delicious, and a bit of tofu with chopped spring onion and soy sauce on top with a beer in a standing izakaya in downtown Tokyo.
As for pheasant, I got put off that fairly early on. My art teacher at school found a very dead one maggot infested on the way to school on his bike, threw it in a sainsburys bag and hung it up in the class room for us to draw and paint under "still life". I can still smell it 30 years laterYOU WERE LUCKY! Down under, that might have been an Emu!
I have successfully pared my collection of both down to just two.
You have no idea just how painful that was.
In the US, land of backwards, union telco techs still lace. It is not permitted to have cable ties on overhead raceway, because the metal tabs will fall down and short the Strowger.
Not true. All the CAT 5/6 cabling in the IBM Systems Test Area is cable tie.
Early Tek's were lace. Later Tek's combo lace/plastic. IBM S/360 Idiot Light Consoles were lace.
Nowadaze of course SOP in the IDF/MDF is Velcro ties because:
A) you can buy on a roll
2) you can undo and redo to move a cable
but mostly because:
C) Wage-slave cable monkeys will pull a zip-tie tight enough to damage CAT5/6/7 etc... Velcro prevents that.
Obviously the overheads and raceways with bundles as big as my waist will need something a wee bit more substantial, but thankfully, that's usually not my problem.
mnem
moo.
Velcro is indeed the cable retention of choice in IBM Z Series for ease of maintenance.
that's ok until you get half way home and realise you've got Velcro ties stuck all over your ass.
As for school, my equivalent was biology lessons when the teacher had acquired a large bag of dead mice from a local lab. Everybody did dissection, being warned not to puncture the bladder. Most succeeded.We had just a peek at Biology in Science where our teacher while a nice guy was a bit of a whimp and asked us country kids to bring in a rabbit or possum for dissection.
Tautech wanting to be the he man provided the possum in short order no worries thinking said whimpy teacher would do a Biology lessen with it but no, the whimp said I was to do it FFS !
Subject.....but headshot.....protected in downunder beanflying territory.
Well dunno what came over me but an unstrung and intact loop of possum intestine was long enough to run 2 benches back and right across the lab and back to the front bench. When I noticed all the nice gals had vacated the class and were almost heaving outside I knew I'd overstepped the bounds of teenage decency and anything wearing a skirt thereafter gave me a wide berth. The dumb shit we do at school.......If you knew the digestive time of that critter, you could have emulated a famous quote (normally done with a roll of copper wire)!