Tag Archives: technology

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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Pololu USB AVR Programmer V2

I recently purchased another ATmel AVR programmer. I normally use a USBasp programmer with out-of-circuit chips and, less frequently, in-circuit chips. Anyway, Pololu is an electronics manufacturer based in the USA, specifically Los Vegas, Nevada. I’ve previously used a couple of … 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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Macrofab Pick and Place (PnP) – musings

NOTE: This post has some significant update of January 28, 2018 I have been doing some PCB SMT design using pcb-rnd with a goal of trying a board assembly shop.  I’ll do a few prototypes but that is all. Macrofab has … Continue reading

Posted in Electronics, PCB Etching | Tagged , , , , , | 3 Comments

STX-882 / SRX-882 Radio Testing

I recently did some testing of the STX-882 433HHz transmitter and the SRX-882 433MHz receiver and, after additional tests, updated my original findings. I tested line-of-sight along a road. I performed two tests using Arduino NANOs and two laptops, shown … Continue reading

Posted in Arduino, Electronics, Programming, software, wireless | Tagged , , , | 1 Comment

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

Posted in Arduino, Electronics, Linux, PCB Etching, Programming | Tagged , , , , , , , | 2 Comments