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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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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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/
This is a 5 transistor ESR meter for testing capacitors. https://eevblog.com/forum/projects/5-transistor-esr-meter-design/
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/
The farm land that has salt can be used to grow vegetables. 2.1 minute YouTube video. https://youtu.be/sspt-evxL0Q
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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From a comment I left in Big Clive’s youtube video https://youtu.be/jgaCYRc1-og In the past I’ve seen Clive having to replace “used up” capacitors in the ‘capacitive dropper’ circuits of low cost line operated devices. The problem seems to be common in other countries but here in the US I haven’t seen any problems with the
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Reply from FB comment Mark French I got a roll (on tape) of 22 uF, 10V and 47 uF, 10V tiny surface mount MLCCs. They’re not polarized, but I’ve heard they tend to be microphonic. I’m going to try leaving the old caps in and bridge a MLCC across them. They’re small enough to to
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The beginning isn’t clear about how it looks. First, scroll to end and look at the photo. https://www.randombio.com/capacitor.html
