Archive for the ‘Photovoltaic and Solar Cells or panels’ Category:

2020-07-28 Solar Power & Afghan Opium Production; Renewables vs. Other

Solar Power Has Transformed Afghan Opium Production This crazy story isn’t one that’s for the better. But Solar power has transformed the poppy growers in Helmand Province in Afghanistan. Crazy world. Renewables Outpaced Coal and Nuclear to start 2020.

2020-07-11 DIY Off Grid Solar System

This is a YouTube video. This guy did a very good job of building an off-grid solar system. It’s transportable, uses four 100 watt panels, two 12V AGM batteries in parallel, can supply 120VAC pure sine wave at 2000 watts and costs under $1,900. This is an excellent video with plenty of details. He calls

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2018-08-30 Using Radio Signal To Power A Receiver

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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2018-07-18 Storage Batteries For Renewable Energy Systems

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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2017-06-08 AD Has ADP5090

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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2014-08-02 Solar Panel From Goldmine

I bought a couple solar panels from  They are cat no G20110 and cost $14.00 each. They are 3.5W and 0.19 Amps at 18 volts.  I haven’t had a chance to measure and evaluate them yet.

2013-11-20 LEDs Power TE Flasher, Not JT Flasher

My recent two blogs on powering a flasher with four red LEDs used a flasher made by modifying a Joule Thief.  It works fine, but it requires a toroid core and wire; the flasher I blogged earlier does not require any inductor.  It is a switched capacitor or charge pump,. and it works okay with

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