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.

Wednesday, May 17, 2017

Teasing out the differences between the "AC" and "DC" versions of the Tesla PowerWall 2

Being naturally interested in such things, I've been following the announcements and information about the Tesla PowerWall 2 - the follo...

Saturday, April 29, 2017

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

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

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

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

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