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MicroAmp-Meter based on Dave,s design (Designing A Better Multimeter)

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PlainName:

--- Quote ---With the big space used by the micrometer text  and the red bar fading out, maybe you could implement some horizontal graphing at the bottom ...like let's say 32-64 pixel tall strip with horizontal scroll showing the variations in current, this way user would see current bursts or whatever
--- End quote ---

I like that idea  :-+

farzansaleem:

--- Quote from: PlainName on April 23, 2023, 12:05:19 am ---
--- Quote ---Your suggestion will cause the wiggling of decimal point from left to right which will create a lot of confusion
--- End quote ---

I am looking at the example video (or gif) and the decimal point is moving, presumably because the digits are centred. For something like this the digits should be static. Suppose the current changes between 10.1 and 9.9 - the digits are shuffling back and forth and it's very distracting.

Since you have a single digit after the point (soon to be two, maybe) I think right justifying would ensure the decimal point is fixed in place and everyone would be happy. After all, the bigger the number the further left it will stretch, which is meaningful without reading when the number is.

However, note that the above assumes you use the full width of a 0 when placing digits, even when the actual digit is not the full width. If you're treating a 1 as only the width of the displayed segments then it will be truly horrible because it will jump around (like in your video).

Re pricing: I would probably buy one for £80 - the value is not so much in the component cost as the development work, and with a relatively small market (until someone in China copies it) the overheads are significant. It would easily cost me that to try and make one myself (although then I could suit myself about how the digits are displayed  8) ).

--- End quote ---

Thank you guys for the suggestions. I would work on these features, especially with the center alignment of the text. I will try to adopt the fixed decimal point feature like Multimeters. At this stage, we will not be able to add an LCD plotting feature.

Yes, it is possible to make similar devices by ourselves or to be copied by Chinese because I have already mentioned that shunt switching topology is open source and has been adopted by the design provided by Dave. It is the complex software that is the IP of this product. This device is running more than 3000 lines of code and WEBGL implementation for plotting more than 200K  points on the web browser. Being able to create something by yourself does not mean you shouldn't give a try to other products :)
We are a bunch of hobbyist guys who did not have a fancy marketing budget and just rely on these types of forums. I am attaching the Kickstarter promotional video to the forum (Sorry for the low-quality because of the file size limit). Please have a look at the WebSocket application feature.
That post has been viewed by a lot of people but very few have subscribed to our campaign. I don't know if this is because of the price or something else. Because of that, I am creating a poll so if you are reading this post please spare some time to vote on the poll.
Thank You.

PlainName:
Don't read anything into the number of views. It's like assuming the number of Google results for something is meaningful.

Personally, I haven't subscribed to your campaign because I am not sure I will buy one. I want to see where it goes and how this progresses, first. But mostly because I don't need or want even more spam. If/when I am interested in seeing what's been going on I am fully capable of just going along to take a look.

Pinkus:
Looks good!  :-+ And around 90 euros seems OK for such a useful tool.
However, as I read your description, a few thoughts came to me about what I (and I'm sure others) would probably be missing quickly and what limitations therefore might stop me from buying. I'll write them down below, maybe they'll be helpful:

1) I often have measurements where I am indeed interested in the low µA-Range standby current, but the unit needs way more than 1A when switched on. An extension with a fourth measuring range (which doesn't have to be super accurate) 1-10A would be ideal (at least 5A), especially since the log function would also allow to log current consumption over a longer period of time, this would be very useful.

2) Also important for me: I do not want to connect the unit to a PC all the time if I do a quick measurement. Then I just want to quickly analyze some basic data. Sometimes I just quick information like:
· actual current
· maximum
· minimum
· average over the whole measurement cycle (you do only average over 1 second)
· switch to a graphical display (curve) of the current cycle (best with some x-axis presets like whole cycle/last minute/last 10s/last s/last 100ms/last 10ms/last 1ms).

farzansaleem:

--- Quote from: Pinkus on April 25, 2023, 08:54:05 am ---Looks good!  :-+ And around 90 euros seems OK for such a useful tool.
However, as I read your description, a few thoughts came to me about what I (and I'm sure others) would probably be missing quickly and what limitations therefore might stop me from buying. I'll write them down below, maybe they'll be helpful:

1) I often have measurements where I am indeed interested in the low µA-Range standby current, but the unit needs way more than 1A when switched on. An extension with a fourth measuring range (which doesn't have to be super accurate) 1-10A would be ideal (at least 5A), especially since the log function would also allow to log current consumption over a longer period of time, this would be very useful.

2) Also important for me: I do not want to connect the unit to a PC all the time if I do a quick measurement. Then I just want to quickly analyze some basic data. Sometimes I just quick information like:
· actual current
· maximum
· minimum
· average over the whole measurement cycle (you do only average over 1 second)
· switch to a graphical display (curve) of the current cycle (best with some x-axis presets like whole cycle/last minute/last 10s/last s/last 100ms/last 10ms/last 1ms).

--- End quote ---

I did some experiments with decimal fixing and also adding max/min values on display. I will improve it later.
At this point, it is not possible to increase the current range but I will definitely increase the range in our upcoming product. 
We are about to launch on Kickstarter. Please support this project.
https://www.kickstarter.com/projects/microampmeter/microamp-meter

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