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My purchase list for my new lab -- budget $1000+, thoughts?

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mathsquid:

--- Quote from: rhb on July 21, 2018, 11:45:04 pm ---Mains powered equipment is not dangerous if it is unplugged.

--- End quote ---

Is that true of a switch-mode power supply?

HB9EVI:
the electrolytic cap on the primary side can keep a charge for a while, depending on the bleeder resistor

rstofer:

--- Quote from: AnyNameWillDo on July 22, 2018, 05:04:44 pm ---Would the Rigol DP832 be a good choice compared to the Siglent SPD3303X?

--- End quote ---

The Siglent might be a fine alternative but I didn't watch the video so I won't know about any warts.

It has better resolution that the DP832 in that you can set down to 1 mV.  To get that from Rigol you have to buy the DP831 which is just a DP832 with s no-cost-to-them option turned on.  Like the DS1054Z in that regard.

Channel 3 on the Siglent  selects from fixed voltages: 2.5V, 3.3V, and 5V  It is not infinitely adjustable like the Rigol.   Well, shoot, it wasn't long ago that the 3rd output was fixed at 5V because logic families didn't use other voltages.  The Siglent hits the important voltages so maybe the infinite adjustment on the Rigol isn't such a big deal.

When I have a device that uses 1.8V, it normally uses 3.3V as well and requires a special power management device to sequence the power.  This is typical of FPGA devices and I don't build boards for these, I buy them.  Then I plug them in to a wall wart.

The Siglent is $80 cheaper than the Rigol DP832 and $400 cheaper than the Rigol DP831 (the price is stupid considering there is no cost to Rigol for the enhanced resolution).

I think I bought DP832 because I had already bought the DS1054Z.  When it came time to buy the Arbitrary Waveform Generator, I bought the Siglent because of a Valentine project presented Feb 14, 2017 (I think).  The project is linked in the following post: 

https://www.eevblog.com/forum/testgear/oscilloscope-bandwidth-confunsion/msg1293461/#msg1293461


I can't find my way back to the project but apparently it was in Chat back around the date above.

So, maybe brand loyalty just isn't important.  I would absolutely buy that SPD3303X-E  I'm not sure the infinite adjustability of Channel 3 is worth $80.  Maybe it is...  I could go either way and $80 just isn't a number that interests me.  The better resolution of the Siglent is nice.  Not necessary, but nice.

Either would work for me...

HB9EVI:
Well, I already have some loyality to the Rigol devices; and I think you mean the DP832A which has the high resolution and all other options already included; the 831 has one bipolar channel and a 5V max channel, while the 832 has instead of a bipolar two independend channels.

Like with the DS1054Z you can easily activate the additional options of the DP832 and turn it into a DP832A - with the exception of the colour display.

One important reason to stuck to Rigol is the fact, that there are 2 suppliers in CH, while there is none for Siglent; and it quite enough to import ham radio and accessories because of missing dealers, so I have no need to go the same way for the lab devices.

rhb:

--- Quote from: mathsquid on July 22, 2018, 05:35:07 pm ---
--- Quote from: rhb on July 21, 2018, 11:45:04 pm ---Mains powered equipment is not dangerous if it is unplugged.

--- End quote ---

Is that true of a switch-mode power supply?

--- End quote ---

As noted, in either instance you do need to have the sense to discharge the capacitors before touching the terminals.

For pete's sake,  this is an electronics forum.  People are supposed to either understand electronics and electricity or want to learn it.  I very much doubt that there are many 5 year olds with $1000 to spend on an electronics lab.

This sort of stuff is what edited books are for.  To provide properly refereed information and advice.  The annual ARRL handbook is an excellent beginners guide.  The internet is a wildly unreliable source of information if you don't already have a significant grasp of the subject.

In fact the OP would be well advised to get that and an older edition of "Electronic Principles" by Malvino or Malvino and Baker.  You do *not* need a current edition unless you're taking a class which is going to assign a particular problem.  Malvino is a PHD engineer who took to writing trade school textbooks.  They are beautifully written and he actually builds all the circuits in the book to verify that he got them correct.  The current edition is over $200 which is insane.  But it has the virtue of knocking down the price of the previous edition.

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