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UNI-T UT61E Multimeter teardown photos.

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user4963:
measure the values ??of the capacitor can write one of these?

Please

Lightages:
I might be able to do that tomorrow

user4963:
thank you.Lightages

Rick Law:

--- Quote from: Electro Fan on August 20, 2013, 09:31:26 pm ---
--- Quote from: Rick Law on June 08, 2013, 05:20:34 am ---
--- Quote from: Legit-Design on June 08, 2013, 03:39:48 am ---...Plus more multimeters is always priceless and enables to do alot more things....Unless they come out with a multimeter with multiple isolated channels, those things are hard to beat when combined.

--- End quote ---

I am reasonably happy with the 61E.  I already have 3 others - 2 radioshack and a DT830B.  But I actually was thinking about getting a couple more  DT830B's when I was playing around with boost circuits:
In Volt, in current, out Volt, out current, drain current, that is 4 right there.  I could use another one to do adhoc readings.

One of my 4 is a DT830B, $6 DMM, not bad.  I use it as my volt meter for my PSU.  It actually performs better than the other cheapos from Radio Shack (4-8 years old).  So I was considering getting a pair of DT830B.  But I hate all those stuff on my table leaving me so little space.

I would not invest in another mid-low end DMMs.  If I would get more DMMs, I will probably aim for a higher end ones or real cheapies.  Mean time, I just got my ATMega328 as Volt/Current meter working on a breadboard and ordered parts to transfer it to PCB.  I divided up the 6 ADC's as 3 pairs of volt+current (switch-selectable) 0 - 5/15/30Volt and fixed 0-4Amp (using a 0.1ohm as current sense and amplified with OpAmp).  The two pairs I have working gets me +-1% to 4% accuracy.  Not bad when I have not yet calibrated them yet.  After I get the parts, I can get the 3rd pair working, transfer it to PCB, and then I'll do some software tricks (the ADC under-reads at low ranges).  If I can bring it closer to 1-2% using my UT61E as "accurate" reference, I just may end up using the ATMega as my PSU's volt+current.  All three channels shares common ground, so it took me a while to figure out how I would make that work for me.  If the thing works (at +- 1-2%), I don't need the DT830B's as volt/current meter.  If it doesn't, well, I learned a lot trying to get it working so far.

--- End quote ---

Please keep us posted on how your Atmega328 meter reading project is going - I'm sure some folks would be up for trying your design if you want to share it.  Thx

--- End quote ---

As promised...

https://www.eevblog.com/forum/microcontrollers/an-implementation-of-atmega328-volt-logger-the-dinometer-a-learning-project/

Benik3:
I suppose that it's the best choice under 75USD? :)

Only thing which disappoint me is the resistance for measuring of high currents :/

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