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Posts Tagged ‘ESR meter’

DIY in circuit capacitor ESR meter

Friday, January 17th, 2014

Here's a DIY in circuit capacitor ESR meter build by Lawrence: This project was conceived as a way to enhance the collection of test equipment on my test bench. I buy a lot of older HP test gear off ebay as well as older radios. Most of this gear is...

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Tinkerer’s tricorder update

Friday, May 24th, 2013

Nickjohnson posted an update to his network analyzer we covered previously: More tweaks and improvements! I've moved to a dedicated LED dimming controller for the backlight instead of resistors, and made a few other layout tweaks. It's now out for fab. A friend put together some nice renders of the...

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Tinkerer’s tricorder

Wednesday, May 8th, 2013

Nickjohnson wrote previously about his Loki PSoC based development board.  Now he’s experimenting with the idea of building an ESR meter: I've been experimenting with different measurement options using the Loki as a test platform. I'm just about ready to start speccing out and designing a PCB soon, and I've...

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Posted in measurement, tools | 1 Comment »

ESR meter rebuilt

Monday, November 19th, 2012

MickM shares how he rebuilt his ESR meter: I just rebuilt my ESR meter. I found the schematic on the web, see ORIGINAL-schematic.png for author. This works well and is easy and almost free to build. It is analog (which I prefer), and uses a 50uA meter. Via the forum.

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Posted in DIY, how-to | 1 Comment »

ATMega88 based LCFesR meter

Thursday, April 5th, 2012

Ben Eishen sent in this link. He says, "I have been thinking about building an ESR meter, and this one looks like a winner." The design is based on the ATMega88 and according to the designer, Dr. Le Hung, "The LCFesR 4.0 unit is a precise, wide range meter that...

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Posted in components, measurement | 1 Comment »

ESR meter build and review

Monday, January 9th, 2012

Wingnut built an Equivalent Series Resistance meter based on this design. He made a couple mods to the original design to get better performance: I used a LMH6619 opamp for the oscillator, this is rail-to-rail output/input and 35mA current sourcing. It was salvaged from another project. Because of this, I...

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Recent Comments

  • Pekka Akselin: This is ridiculous!? :-) We are back at 256(!) byte EPROMs that needed multiple, a handful, of voltages to run! :-(
  • KH: Let's try a back-of-envelope calc balancing energies. From MCP1700 datasheet, there are graphs for a 200mA load step. Estimate the energy shortfall as 12uJ. Say...
  • Daniel: It's been a week and my comment is still awaiting moderation. Apparently the CIA doesn't want their involvement known?
  • KH: Agree, so okay, I guess he must have learned from somewhere. 100nF and 1000uF is so far apart, that was jarring; it's more magic incantation...
  • Max: I have a suspicion the hefty electrolytic cap might be some sort of cargo cult carry-over from other RF-based projects - for instance, I've seen...