Show Posts
Pages: [1]
1  Topics / Science and Measurement / Re: ESR meter with Arduino on: April 11, 2013, 03:29:15 pm
Yup, it is super simplified. Just decided to do DC analysis only. I ran your schematic and I'm getting the same voltage per ohm on the ADC pin  smiley Have you tried running different Schottkys? It changes the ADC voltage quite a bit! The DUT is incremented in .5 ohms on the attached graphs.
2  Topics / Science and Measurement / Re: ESR meter with Arduino on: April 11, 2013, 01:51:36 pm
Totoro:
Ended up doing some spice analysis on the schematic. The line is very linear! So with a simple slope formula should be able to get some good results. I currently have some 1% resistors in the mail, when i get them in i'll test this out.
3  Topics / Science and Measurement / Re: ESR meter with Arduino on: April 09, 2013, 10:53:35 am
What Schottky diode is everyone using that has had success? I am currently using a B340A-E3/61T and the pulse peak at the terminal with no DUT is only around 150mv. I think this is causing my reading to drastically be off. I am trying to wrap my head around how the current voltage divider equations every one is using is working. It doesn't take in account of the clamping voltage and power dissipation of the Schottky diode. Any help would be greatly appreciated!

4  Topics / Science and Measurement / Re: ESR meter with Arduino on: April 30, 2012, 02:18:17 pm
Will this ESR work in circuit? What is the output voltage P-P? Thanks!
Pages: [1]