Author Archives: celem

Smartphone screen adhesive – some empirical information

When installing a replacement screen on a Samsung Galaxy S5 I used a Chinese product named “ECO-FUSED” in a 2mm width. When I removed the original factory adhesive I noticed that it seemed a bit thick – certainly thicker than … Continue reading

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Fixed Samsung TV Turning On & Off

My 40″ Samsung TV model LNT4053HX/XAA developed a problem where when first turned on it would make clicking noises and turn on and off until it finally stayed on. I lived with it for a few months but it progressively … Continue reading

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Inexpensive ESP8266 in UNO Form

Two+ weeks ago I purchased an ESP8266 Module board in an Arduino UNO form factor. See Fig.1, below. It cost me $3.20 US including shipping from China, I didn’t need it or even have a use for it, that I … 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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Manjaro Update Woes & Resolutions

On August 18, 2018 I updated my Manjaro Linux system with the arrival of a rather large update and it broke my printers. I have three printers, all Brother brand – one USB connected HL-2140 laser printer, one WiFi connected … Continue reading

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Video on Creating pcb-rnd PCB footprint e/w Silk from part’s PDF spec

When I create Printed Circuit Boards (PCB), I prefer using the program pcb-rnd. Pcb-rnd was originally forked from gEDA’s PCB program but it has incorporated so many new functions and features that its capabilities far exceed the gEDA’s PCB program … 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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Tamarack Fan – What’s Inside

Another non-electronic post. It is an interesting design using cams, levers and microswitches. It’s sort 1960s, in a Rube Goldberg’ish way but it works and that is what counts. Well, the mechanism works well but the fan is noisy and … Continue reading

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Whole House Fan (Non Electronic Post)

I haven’t posted lately because an electronic project that I worked on for much of 2017 and into 2018 occupied most of my spare time. Unfortunately, it hit a roadblock (cost of FCC compliance testing, not technical) and my attention … 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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