Hi!
I have done some more steps to finish this ESR meter.
Yesterday I received some material and there was also the regulator of the type: LM2859-50.
This is, I think, better known to you than the TS2950-50 and i tested is and it works fine.
This wil be the box i will use, look at the meter, something is broken....
I also had some of these smaller meters, but I thought it was less fun.
It was a bit difficult to open the meter, it seemed that the meter cap was also glued.
I used the meter scale of Jay_Diddy_B and at printing I adjusted the size for my meter.
Here you can see i'am measuring a 100uF capacitor, the blue version.
The picture below shows my two "hacks", at the top of the extra transistor that controls the battery LED.
And a coax connection via a 47 Ohm resistor...
Why? look at the pictures below this one.
With this simple addition, if you connect a scoop via a 47 resistor you can get an impression of the induction of your connected component.
In the case of a capacitor, this is indicated as ESL.
It is also instructive to see what happens when you test a capacitor with long connecting wires, you will see a lot of overshoot on the edges.
Some measurements, both capacitors are 100uF and 16V.
One is a rubicon ZLM series en the other ... not shure.
First the reference, a 1 Ohm resistor with the shortest possible connection wires.
This gives a nice block of signal without abberations.
And now for the measurement of only the blue capacitor with 8mm long connecting wires.
This is the measurement of the Rubicon capacitor with 8mm long connecting wires.
It is visible that the ESR is smaller with this capacitor, but also that there is still quite a bit of induction present because of the relatively long wires.
What is extra handy of this hack is that you have an opportunity to see if two capacitors do not resonate in parallel.
Blue capacitor and 0.47uF Cer.
And now the Rubicon and the 0.47uF Cer, there is a problem... not a good match!
And this is a picture of the rubicon connected with the smales posible wires.
And this is the measurement of this setup
Laters more, time is up!
Kind regards,
Bram