| Electronics > Projects, Designs, and Technical Stuff |
| ESR meter |
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| tigr:
Less than 0.01 Ohm. For example. Rubycon ZLG Ultra Low Impedance 1000uF/35v.Max.impedance-0,012Ohm. http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_ZLG.pdf |
| kripton2035:
--- Quote from: tigr on January 03, 2018, 08:28:43 pm ---Less than 0.01 Ohm. --- End quote --- then you need 4-wires measurement, and this circuit is only 2-wires. you won't get these small values with it. |
| tigr:
2-wires 4-wires We see that there is no difference. ;) |
| The Electrician:
--- Quote from: tigr on January 03, 2018, 10:47:50 pm ---2-wires 4-wires We see that there is no difference. ;) --- End quote --- There is no difference when the two "wires" are the very short and thick blades on a tweezer type LCR meter as you show. That's not what Kripton2035 is talking about. The project you are planning to build has a couple of banana plugs on the project box connect with ordinary wires inside the box. Those wires probably have a resistance of several milliohms which will add to the measured ESR unless some method is provided for compensating. Using a 4 wire connection is the standard way of solving the problem of lead resistance. Why are you going to build this project when you already have a tweezer LCR meter? Doesn't the tweezer meter use a sine wave for excitation? |
| tigr:
--- Quote from: The Electrician on January 05, 2018, 03:48:37 am ---Why are you going to build this project when you already have a tweezer LCR meter? Doesn't the tweezer meter use a sine wave for excitation? --- End quote --- I'm interested in a circuit without a transformer. Yes, I have almost a sinusoidal signal. |
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