Racemaniac's postbag

Tell us about the cool things you've recently got
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RogerClark
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Re: Racemaniac's postbag

Postby RogerClark » Mon Feb 06, 2017 4:05 am

zmemw16 wrote:anyone remember colored dot coded capacitors ?
some were tubes with tags at each end for pcb mounting.

istr that most of my first bits were from tv's, the graveyard of the local rental shop, back garden(?) 20ft x 30ft and about 3 or 4ft deep
in chasis's.
all rather dangerous with glass valves and the tv tubes possibly deadly, great for teaching how to step very carefully indeed.

stephen



Its bad enough with the various different numbering systems used by capacitors.

If I'm not sure I hook them up to my multimeter as measures capacitance (good enough to confirm the value based upon the numbers written on it)

racemaniac
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Re: Racemaniac's postbag

Postby racemaniac » Tue Feb 07, 2017 4:45 pm

2 of these just arrived: https://www.aliexpress.com/item/1x-99-9 ... 02816.html

What i'll use them for: i'm trying to make a simple spotwelder from an old microwave transformer :). these will be the electrodes to weld with :). i'm wondering how well this project will turn out, you can easily find instructions for making such a divice on the internet :).

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BennehBoy
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Re: Racemaniac's postbag

Postby BennehBoy » Tue Feb 07, 2017 4:59 pm

I use something similar, but wider, as a drift to beat bearing races out of gearboxes.
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https://github.com/BennehBoy

racemaniac
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Re: Racemaniac's postbag

Postby racemaniac » Wed Feb 08, 2017 7:33 pm

these arrived today :)
I've ordered several sizes of cable glands so i can build in projects into boxes and have a nice way to get the cables out :)

The first cable gland i used was for my christmaslights :)

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BennehBoy
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Re: Racemaniac's postbag

Postby BennehBoy » Wed Feb 08, 2017 8:18 pm

Glands and grommets for the win!
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https://github.com/BennehBoy

racemaniac
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Re: Racemaniac's postbag

Postby racemaniac » Fri Feb 10, 2017 5:41 pm


racemaniac
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Re: Racemaniac's postbag

Postby racemaniac » Wed Feb 15, 2017 7:35 pm

this guy arrived yesterday :)
fluke.jpg
fluke.jpg (52.51 KiB) Viewed 93 times


I was thinking about getting a decent multimeter, something i know won't try to kill me if i start measuring 220V AC ^^. (ok, my 20€ chinese one probably won't either, but i'd rather play safe :p).
This should be the only multimeter i'll need for a very long time :p.

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ahull
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Re: Racemaniac's postbag

Postby ahull » Thu Feb 16, 2017 1:20 am

I'd trust my UniT with 240V, but not any more than that, the meter will probably be OK up to twice that, but I wouldn't want to find out the hard way that it wasn't up to the job.

The fluke on the other hand I would trust in an industrial setting (3 phase 380 to 420 VAC) no worries at all.

The Fluke 87 V states ... "Dual display resolution – 6000 or 20,000 counts - CAT III 1000V, CAT IV 600V safety rated", and has genuinely been safety tested.

Those cheap $2 meters on the other hand .... 50 V max.
- Andy Hull -

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RogerClark
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Re: Racemaniac's postbag

Postby RogerClark » Thu Feb 16, 2017 2:12 am

What about Fluke meters from AliExpress e.g.

https://www.aliexpress.com/item/Fluke-1 ... 83708.html

Not sure if I could trust them

racemaniac
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Re: Racemaniac's postbag

Postby racemaniac » Thu Feb 16, 2017 8:56 am

RogerClark wrote:What about Fluke meters from AliExpress e.g.

https://www.aliexpress.com/item/Fluke-1 ... 83708.html

Not sure if I could trust them

not sure either, though i heard they were decent :).

and i know the one i now bought is overkill for my needs, but for a thing that last a long time, why not just go for it and buy a decent one. I must say the prices here in europe of the flukes is ridiculous >_< (usually 600€+ for that one). if i hadn't found a somewhat affordable one on amazon uk (and luckily the brexit hasn't happened yet), i'd have gone for something else.


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