Author Archives: celem

T430 Linux friendly Laptop – New to me

As a subscriber of HackaDay.com a recent article Piqued my interest. It was titled “UNLOCKING HIDDEN POTENTIAL IN IVYBRIDGE THINKPADS” and described older 2012 ThinkPads and giving them more years of life or improve performance. It involved using an open-source … Continue reading

Posted in Electronics, hardware, Linux | 2 Comments

A Minimal Security Small Safe/Lock-box – Caveat Emptor

I live in a safe area with negligible theft. Nonetheless, I recently decided to install a minimal security safe/lock-box – one that will keep certain items from the eyes and fingers of basically honest people that visit my home, such … Continue reading

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A Good Laser Printer for Linux

A month ago I purchased, via Amazon, a new Brother MFC-L2710DW wireless laser printer/scanner/copier/fax e/w multi-sheet feed and 2-sided printing. Apparently I unknowingly bought it during a big sale because I paid $109 yet the current price is $199. Anyway, it is a great … Continue reading

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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

Posted in EDA, Electronics, geocaching, hardware, PCB Design, Uncategorized | Tagged , , , , , | Leave a comment

Repair/Upgrade SANGEAN RCR-5 Clock Radio

I have a SANGEAN RCR-5 Alarm Clock Radio that I use to play its radio each morning at the set alarm time. The RCR-5 radio has excellent audio quality for such a small unit – not tinny at all, with … Continue reading

Posted in audio, Electronics, hardware | Tagged , , , | 2 Comments

Tempered Glass Smartphone Screens

I just finished installing five tempered glass screen covers onto two LG G2, one Motorola G5 Plus and two Samsung Galaxy S5 smartphones. I used Supershieldz because of many rave reviews about their product. Well, I’ll add my rave review. … 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

Posted in Electronics, geocaching, Linux, PCB Design | Tagged , , , , | 1 Comment

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

Posted in Electronics | 2 Comments

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

Posted in Arduino, ESP8266, wireless | Leave a comment