KA7OEI's blog

Random musings - usually on a technical (nerdy) subject - perhaps related to amateur radio and things found at ka7oei.com and modulatedlight.org. No AI is used to generate this content.

Saturday, April 29, 2017

An RV "Generator Start Battery" regulator/controller for use with a LiFePO4 power system

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I was recently retrofitting my brother's RV's electrical system with LiFePO 4 batteries ( ReLi 3 on RB-100's). This retrofit...

Wednesday, April 19, 2017

A daylight-tolerant TIA (TransImpedance Amplifier) optical receiver

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While the majority of my past experiments with through-the-air free-space optical (FSO) communications were done at night, for obvious reaso...

Friday, March 31, 2017

A (somewhat convoluted) means of locking a "binary" (2^n Hz) frequency to a 10 MHz reference

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DDS (Direct Digital Synthesis) chips are common these days with small boards containing an Analog Devices AD9850 board being available on Ev...

Tuesday, March 21, 2017

The 1J37B as a replacement for a 1L6?

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The rarity of the 1L6: Owners of the classic Zenith Transoceanic radios from the early-mid 50's will probably be aware of the pain in...

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Friday, February 24, 2017

Fun with self-oscillating TV flyback transformer circuits, arcs and high voltage

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A few weeks ago I ordered a few things from The Electronic Goldmine and one of the items that I picked up was a small flyback transformer (S...

3 comments:

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