Posts Tagged ‘capacitor’

Why electrolytic capacitors are actually kinda shitty

Wednesday, March 28th, 2018

Afroman writes, "Electrolytic capacitors are common, but knowledge of their limitations is uncommon. A demonstration is shown highlighting the difference in performance between electrolytic and ceramic capacitors in power supplies. Other topics discussed in the video: Electrolytic capacitor construction, ceramic capacitors, ESR, ESL, impedance curves, why “0.1uF”, and more." Via Afrotechmods....

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Posted in tutorials | 2 Comments »

App note: Output filter caps for mission critical applications

Sunday, June 4th, 2017

A great guide from AVX on output capacitor types and their specific uses based on ESR, ESL and temperature properties. Link here (PDF) This document discusses the effect of capacitors on output power quality. It evaluates and provides a comparison of different capacitor technologies, their high reliability qualification availability from...

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Posted in app notes | No Comments »

Tear down of a super capacitor

Tuesday, January 10th, 2017

[embed][/embed] A teardown video of a 1 Farad super capacitor from Electronupdate: In a recent video on the tear down of an electrolytic cap a viewer was wondering what a super capacitor looks like. They have much more capacitance: 10,000 time more on average for the same volume. Surely this means the...

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Posted in Teardowns | No Comments »

Bad electrolytic capacitor teardown

Monday, December 19th, 2016

Teardown and analysis of a bad electrolytic capacitor from Electronupdate: So, there sitting in a dumpster is what looks like a perfectly good monitor... some of the protective plastic on the base was never even peeled off. A quick power up showed why it was tossed: it simply did not...

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Posted in Teardowns | 2 Comments »

App note: Conductive polymer aluminum solid capacitors

Sunday, December 13th, 2015

Presenting the polymer capacitor by Nippon Chemi-Con Corporation. Link here (PDF) Conductive polymer aluminum solid capacitors, which will be abbreviated to “polymer capacitors” in the following, have been recently extending in their applications. The polymer capacitors as well as conventional aluminum electrolytic capacitors are featured by large capacitance and excellent...

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Posted in app notes | 3 Comments »

On-chip decoupling capacitors

Monday, September 15th, 2014

Ralph Doncaster writes: In virtually all of my micro-controller projects, I'll use 0.1uF ceramic capacitors between Vcc and Gnd. Depending on the power draw of the MCU and inductance on the power lines, they may not be necessary, at a cost of a penny or less each there's little reason...

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Posted in components, how-to | 4 Comments »

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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Posted in DIY | No Comments »

Emicon-Fun inductor/capacitor lessons

Thursday, August 23rd, 2012

Riktw writes to inform us of a tutorial site covering the theory behind capacitors, and inductors, as well as noise suppression filters. The site is actually a blog, with new posts being posted every month or so. When looking for a small switching power supply module at the website of...

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Posted in tutorials | No Comments »

Troubleshoot and repair a defective LCD monitor

Thursday, February 2nd, 2012

Victor took apart a defective LCD monitor and repaired it. The LCD didn't respond at all to the power button, so chances were good something was off in the power supply. Sure enough there was a bulging cap, replacing it revived the monitor and saved it from the landfill. Some...

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Posted in repair | 6 Comments »

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