Well, I feel like the biggest doofus right now... That must've been the dumbest chain of events. Please disregard my post above.
But thanks for the replies!
Hi all
Interested to build this ESR meter. Just thinking is there any place where i find part list to this? Shematic i see most components, but not get right package sizes and is there example some very accurate tolerance resistors etc?
I think i use Farnell.com to order parts what i need and think if i do that circuit board on china because not have devices to do circuit board my home or work
I am very happy every tips and big thanks To Jay_Diddy on whole project.
edit: Can this meter use circuit directly without remove caps out of circuit?
Ok thanks for fast response. I think is there protection charged caps or do i need to empty capacitors with resistor before plug this meter there? Of course thats always normal way to empty capacitors before, but is this goes brokenif not remember do that? (i mostly talking low voltage secondary side caps).
Any specific needs multi-meter what to use with this meter. I now use Fluke 79 III is that good enough to this?
edit: Can i use some low voltage caps, resistors etc on normal part list. (C1, C3, C4, C7, C8, C9) Example 50v caps X7R 10%? And resistors i think can use normal resistors (tolerance 1%)?
R21 need to be some resistor close to 0R? Example 0.13ohm?
Anyone use some low voltage drop regulator there easier use with batteries? (I think use two lion cells (about 6.4-8.4v), this regulator stop working correctly 7volts? Example this one: http://uk.farnell.com/richtek/rt9058-50gx/ldo-fixed-5v-0-1a-sot-89-3/dp/2377642
Lions are protected undervoltage situations. Just think if this LDO regulators are not that accurate that normal linears, if that so i keep that linear regulator what is default part.
Jay_Diddy_B thank you so much for publishing this project!
I' m going to build it but I don't know which is the 'suggested' version of PCB.
Is it the one at this post? (4053_ESR HAMMOND 1591L DIY.pdf)
(it 's different from the PCB in your 1st post)
Hi everybody.
Jay_Diddy_B
Yoy 're writing: 'If I plot Vout versus ESR, I get:'.
This is what I 'm trying to do with the LT SPice file, the '4053 esr meter.asc' you have uploaded.
How can I do this simulation, Vout versus ESR?
Thank you in advance.
You also wrote:
'I wanted to make sure that the adapter is not damaged if it is connected to a charged capacitor. To demonstrate this a switch is used to connect the adapter to a charged capacitor, the charged capacitor is connected at t=2ms'.
1. Why did you use a switch (S5, MySwitch) to connect the adapter to a charged capacitor and you didn't connect it directly without a switch?
2. The charged capacitor is illustrated by V3, right? But the voltage of V3 goes to the two pins of S3.
That is: to GND (logical) and to the bottom of R4 (non logical for me)!
I would connect V3 at GND and top of C1.
Could you explain a bit?
3. V3 is a pulse which begins with -2V and after 2milliseconds goes to 2V. Stays at 2V for 5milliseconds and then falls.
So, where do the 400V, that we see accross the terminals, come from? Why did you put 2V and not 400V?
The original board was wider than 50mm and did include the calibration potentiometer. This is shown in this message:
https://www.eevblog.com/forum/projects/esr-meter-adapter-design-and-construction/msg341771/#msg341771
The version included in this message, does not include the adjustment potentiometer:
https://www.eevblog.com/forum/projects/esr-meter-adapter-design-and-construction/msg342045/#msg342045
Does anyone know how to determine the resistance of R6 and r22?I can also use R6=1.2k ohms.
I hope to get the correct calibration method
Hello, I too build this nice meter and it seems to work. But the output voltage looks not very smooth - is that normal? My multimeter shows valid DC values when I use it with the esr-meter, but my Arduino does not get correct values from it, thats why I "investigated" the output waveform with an oscilloscope.
I expected the output waveform to look a bit more "straight"/rectified. Does anybody know what is going on, is that normal or perhaps do you straight on see that I somewhere made an error in the build process? Thank you!