A good article about signal distortion in a Butterworth low pass opamp filter using C0G and X7R MLCCs. https://www.edn.com/signal-distortion-from-high-k-ceramic-capacitors/
Archive for the ‘Capacitors’ Category:
2024-03-08 FWBR Ripple Calculator Online
This may be helpful when choosing the amount of capacitance for a certain unregulated AC power supply – the kind that uses an old fashioned transformer. It calculates one variable given the others. https://www.chipbuilder.com/full-wave-power-supply-ripple-calculator.html
2023-12-05 1500 pF Capacitors “Age Down” In Value – Out Of Tolerance?
James Chessman gave me permission to use his comment. “””I have encountered a phenomenon called “age-down” in ceramic capacitors tested on ICT (In-Circuit Test) machines. I was working for a circuit-board manufacturer, developing new test sets. I was seeing these caps consistently read high in new tests. And, pulling them out of the circuit they
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2022-05-28 Capacitors: Inferior Or Compromise
Long discussion about the great electrolytic capacitor failure fiasco of 2003. Someone said Dell lost $420 million on in-warranty repairs (we had Optiplex 270 and 280 MoBoards with those bad caps). Tom May One single video of cheap capacitors failing could be an individual with an axe to grind, trying to blemish a company. I
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2022-03-12 Homemade Adjustable Capacitor
Homemade Adjustable Capacitor I read that the 365 pF air variable capacitors are very expensive, $30 or more so I decided to try to build one. It’s not difficult to make an adjustable capacitor out of materials one may have at home. This one does not adjust easily, it’s more of a prototype. I got
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2022-02-27 Caps Wiki – Repairing Electronics
Caps Wiki – a place for you to share your repair notes. I like the idea. I’m wondering if I have the patience to spend the extra time. https://hackaday.com/2022/02/24/caps-wiki-place-for-you-to-share-your-repair-notes/
2021-11-12 5 Transistor ESR Meter – EEVBlog
This is a 5 transistor ESR meter for testing capacitors. https://eevblog.com/forum/projects/5-transistor-esr-meter-design/
2021-07-25 Supercapacitors Have 1000X Lithium-Ion Life
Supercapacitors have 1000 times more life than lithium-ion batteries – Dr Akshay Singhal, Founder, Log 9 Materials . https://www.financialexpress.com/auto/industry/interview-dr-akshay-singhal-founder-log-9-materials-supercapacitors-have-more-life-than-lithium-ion-battery-2-and-3-wheeler-ev-battery/2296561/lite/
2021-05-06 Farming With Salty Water
The farm land that has salt can be used to grow vegetables. 2.1 minute YouTube video. https://youtu.be/sspt-evxL0Q
2020-10-29 Freq Counter – Crystal Tester Mod For Low Frequencies
I got this frequency counter and crystal tester mainly for the frequency counter. Today I decided to test a few crystals, and was successful with ones above 10 MHz but not at 4 MHz. The two capacitors labeled C2 and C3 are the feedback to the crystal, and they were originally 22 pF. So I
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