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musefan wrote: It sounds like a Christmas song being played backwards and underwater
Alright... 
musefan wrote: with Chris Martin singing over the top of it...
Who? 
musefan wrote: It's not bad end result though 
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Sander Rossel wrote: Who?
The Coldplay singer
Disclaimer: I am not particularly a fan, but they have a couple songs that are acceptable 
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musefan wrote: a couple songs that are acceptable
Clocks and Speed of Sound, most notably 
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Ring in one's ears ? (4,6)
"I didn't mention the bats - he'd see them soon enough" - Hunter S Thompson - RIP
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CROP CIRCLE!
"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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"I didn't mention the bats - he'd see them soon enough" - Hunter S Thompson - RIP
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Oh bugger.
I thought that was a joke ...
"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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I didn't get much use out of my Kill-A-Watt until it stopped working.  It looks to be a pigtail fuse in a size that is hard to find (i.e., very small, 0.2A, 250V) , such that even Newark Electronics doesn't seem to carry it. (Of course, anyone that knows a good store for electrical parts with a huge selection should proffer it here.)
So I think I want to get a much more rugged meter; and no, I don't want to rig up something using a conventional multimeter - I want the only hot lines to be the NEMA male & female. At the very least, I'd like it to be something that I could fix myself, using a multimeter to diagnose it.
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I go to Digikey or Mouser when I shop for electronic parts. If you cannot find your fuse there, it probably doesn’t exist.
Mircea
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Pick a few of the larger fuse manufacturers and ask if they have something that will fit (or they may even have a vast product display/listing online). If they do then find out who sells it.
Here's a list of candidates.
[^] For one of them, I got two click in to here [^] but, since I don't know any more about your fuse than it load limit and that it's tiny, I had to stop.
| Ravings en masse^ |
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| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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Kelly Herald wrote: Have you checked Mouser.com?
After your message, I have. Thanks!
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This is a question for the hardware hackers among us, particularly those with experience developing devices that use I2C, SPI, SDMMC, and/or I2S busses.
I write a lot software to communicate over such busses these days, and after abandoning the Arduino framework because it's too hobby-kit and not really great for commercial stuff, IMO - I've had to rewrite a lot of "driver" code because it exists for Arduino but not for example, for the ESP-IDF.
Debugging driver code bus issues are a pain - I really need to see the signals on the bus sometimes. This is why I want opinions from folks that have worked with an oscilloscope (or better tool?) to debug I/O on these busses.
What do you use? What do you recommend? Basically I need to (for example on I2C) wire up my scope to SDA and SCL lines, and see the timing on the SCL, to check the levels of the SDA to get my data 1s and 0s. Preferably I need a modern device that can log to my PC over USB, bluetooth or wifi because an I2c bus operates at 100khz and an SPI at 20, 40 or 80mhz a lot of times (at least on an ESP32) and I need to examine it after the fact to see the bits - or rather, the levels and edges I can translate to 1s and 0s.
If the scope can measure multiple inputs at once, and if it can sync to an external clock signal (for example, SCL on an I2C bus, or SCK? on an SPI bus) that would be awesome.
I don't care that much about cost, but I was hoping to keep it under $500USD unless there's compelling reason to spend more.
I also don't need a device that can handle a lot of current or voltage. I'm dealing with sub 12vdc, usually less than +5.5vdc, < 3amps
Real programmers use butterflies
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It's been years since I got my hands dirty on this stuff, but I hear good things about PicoScope gear[^] . The 2000 series would probably be enough for you, and it's certainly within your budget.
Cheers,
Peter
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012
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The PicoScope 2000 looks like just the ticket. Thanks!
Real programmers use butterflies
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Checked it out, it has built in support for I2C debugging, so that's really all you need it seems like.
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I was looking at it and I might spring for the 3000 since I don't think the 2000 can do SPI (not enough bandwidth)
The 3000 can do SPI
It's got a price to match though. 
Real programmers use butterflies
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I haven't worked with oscilloscopes for many years, so I won't give any specific recommendations.
But, if you're measuring square waves you need at least ten times the bandwidth of what you're measuring.
Also if you're measuring a very low power circuit the probe itself puts a load in the circuit which changes the behaviour. If that's the case you might want to invest in an active probe.
This should not be a problem with I2C though.
<Edit>Might tell you though that my favourite used to be an Anritsu, but that recommendation doesn't have any bearing today.</edit>
modified 19-Mar-21 3:35am.
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Mine was always Tektronix - damn good scopes, and an excellent tech support department!
But again, irrelevant these days...
"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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Worked with Tektronix, HP and Anritsu, and another one I can't remember now.
They were all good, but whoever designed the Anritsu was on the same frequency as me. Damn easy to work with.
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If it's for a hobby, then it might be worth looking at FleaBay for second hand stand alone scopes: A Tektronix TDS210 can be got for about the same price as a new PC-based USB scope, and will almost certainly come with better quality probes.
And I tend to worry about PC based scopes: just how good is the isolation, what's the chance of it putting spikes into the PC instead of absorbing them ... probably all groundless, but still.
"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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It's at least in part, for commercial projects.
I need a PC based scope because decoding SPI and I2C signals by hand is a mug's game, never mind SDMMC.
I need the logic analyzer output to be able to be run through a software protocol decoder or I won't be productive.
I'm not concerned about isolation failure - my bench connects to my PC via a quality powered USB hub, so I've already got one level of isolation in place.
Real programmers use butterflies
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OriginalGriff wrote: And I tend to worry about PC based scopes: just how good is the isolation
Good catch, Picoscopes aren't isolated, so you need to know what you're doing.
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