Tag Archives: electronics

GeoCoin – My 2nd Electronic geocoin

This is my second electronic GeoCoin using the same electronic design. My first geocoin was one shaped like the state of Florida – see THIS-LINK. This one is in a more traditional geocoin shape. The only thing that it does is blink … Continue reading

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Electronic Geocoin

I used pcb-rnd to design a Printed Circuit Board (PCB) with a “geographical” shape, the shape of the state of Florida, for a Christmas present of six assembled devices for my brother who lives in Ocala Florida and is an … Continue reading

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Nifty SD Card Gadget

I recently purchased, on eBay, a nifty little SD Card gadget. You can plug either a regular or micro-size SD card into it and then plug into either a standard or micro USB port. It is pretty handy, especially for … Continue reading

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Solar Garden-Light Failure Autopsy

About a year ago I placed a Dollar-Tree Solar Garden-Light, (Fig 3, below) in a sunny place of our yard. From a previously identical light I knew that the battery contacts were thinly plated steel which would corrode and cause … Continue reading

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Updates for the Garden Light Experiment

I have added some updates to my old 2012 Garden Light power supply post. Check out the updates and you’ll see that reader Peter/Tom has been more successful than I was. Also, you’ll find a reference to Russian author Ivan … Continue reading

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Arduino Teaches Old Coder New Tricks

In September, 2012, my article of this title was published by Linux Journal magazine. A blog version of the article is below. Background The first significant electronic circuit that I designed and implemented was in 1973 and consisted of several … Continue reading

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DIY PCB Etching

Having read much of what is readily available on the web concerning DIY PCB Etching, when the need arose, I decided to etch a board two ways – first with the Vinegar & Salt method and second with the sponge and Ferric … Continue reading

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