From FB group Building Transistor Radios 2018-09-01 There are too many ‘gotchas.’ You have to put up a large sized antenna to gather enough power to run the circuit. That means you cannot use this in a city where the properties are too small, due to lack of space. You go to the country where
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Reply left on comments for a YouTube Ted talk by Sadoway on molten magnesium – molten salt – molten antimony storage battery David Tiessen Long ago I calculated that the number of solar panels to populate such a large area would be in the billions. But saying it would have to be the size of
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From FB group Bell Telephone That reminds me of the EMS we had at the college. The original system used RS-485 around campus. So they started using IP over the network. So at the end of Friday in the hot summer, the Energy Management System tells the A/C units on each bldg to shut down.
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From article in https://electrek.co/2018/05/11/tesla-giant-battery-australia-reduced-grid-service-cost/amp/
Ever since I’ve been experimenting with Joule Thiefs I’ve done so with the intention of using the circuit for boosting a low voltage source to power a higher voltage circuit. So I think this Analog Devices ADP5090 is very useful for doing just that: powering circuits up to 200 mW from very low voltage power
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I captured this off a video and tried to make it a bit more readable. I think it was from Sanjev. I built it and it does work at 40 millivolts. The 2SK170 JFETs are not common, and may be difficult to obtain. Other JFETs can be used, but I haven’t tried them. I wrote
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I have often seen schematics of Joule Thief chargers for use in charging Ni-MH rechargeables from used alkaline cells. The idea is to boost the voltage of the used alkaline cell up to high enough to get current the flow into the Ni-MH cell. One setback is that conventional JTs are only 50% efficient, so
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I have been into this kind of stuff for quite a while. You can search my blog for more on this. It’s difficult for even the strongest of bicyclists to put out 100 watts for a few minutes, let alone an hour. Assuming that a person could pedal a 100% efficient 50 watts for an
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Thanks for the article, QS. It shows a whole lot more than Batterizer’s website. Now that I see what it looks like and how it works, I’m more convinced that it’s not snake oil. According to the article they have been able to miniaturize the circuit. They say the circuit has been around for awhile.
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A new store opened up a few weeks ago in my neighborhood. It’s called Daiso and is much like a dollar store except (unless otherwise marked) everything is $1.50. It helps if you can read Japanese because many of the items are labeled in Japanese. I bought a ‘Hand Pressing Flashlight’ with 2 white LEDS,
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