Apparently the disasters like storms, tornadoes, hurricanes and transformer failures are eating up all the supplies of distrbution transformers and manufacturers can’t keep up with the demand. If there were a disaster, the orders for replacements to get the neighborhoods back on the grid may be held up for weeks or more. https://www.publicpower.org/periodical/article/appa-survey-members-shows-distribution-transformer-production-notmeeting-demand
Archive for the ‘Electronic Components’ Category:
2023-06-27 The Reasons Behind The Chip Shortage (Sabine)
Very good video about the chip shortage. There were fires in several plants, natural disasters like the earthquake in Fukushima, and too much dependence on only a few factories. We need to prevent this from happening again.
2023-06-06 ITT2222 Not Standard Pinout Of PN2222
Caroline Joy Barnhart Your Kit must’ve had those “high quality” Radio Scrap components. 😆 My guess is you got one of the ITT2222 transistors. They made their plastic packaged version of the 2N2222 so that it did *not* conform to the standard E B C of the PN2222 or MPS2222. They were unpopular because 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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2022-05-08 Audio 10 Meters Over Laser Beam
I got this idea; instead of using a microphone and preamp at the end of a twisted pair, I would build a microphone, preamp and modulate a red laser with the audio and pick up the audio about ten yards away with a light detector. Notice that it runs on two 2V photovoltaic cells in
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2022-04-20 Philips Ultra Efficient LED Light
Big Clive tears down and reverse engineers a Philips ultra efficient light bulb. It’s 60 watts equivalent but draws only 4 watts. It has a color rendering index of only 80, and costs about ten Pounds UK or about $13 US. This uses 8 filament strings of LEDs and the filament string drops about 200
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2022-03-20 LED Lights May Not Last As Long As Incandescent Lights
The lifetime of incandescent and LED lights is extremely dependent on the temperature at which they run – for incandescents, GE says it’s the inverse of the 7th power of the voltage – the voltage increases and the lifetime decreases. In the case of LEDs the problem is most designs sacrifice thermal management to get
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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/
2022-02-19 Blinking LEDs Can Look Like They’re On Steady
Blinking LEDs are usually reset by the voltage dropping to zero then coming back on. So if one LED, probably the fastest one, blinks first, all the rest in the series string will be reset, then comeback on again when the fastest one comes back on. So you have essentially a single blinking LED and
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