Show Only... Charts / Google Maps / Maps / Photos

Tech Valley

Questions? Need an updated map? Email me

Why Radar Detectors Matter More Than Ever

"DeMuro thought his detector would thwart any potential speeding tickets? Condoms break sometimes. Does that mean no one should use them? Hey Doug, what do you think will happen if no one uses detectors anymore? I’ll tell you. A large minority of Waze-tagged speed traps will disappear. Why? Because the cop hiding behind a bridge can’t be tagged by Wazers who aren’t looking for him. A detector may be the only warning of their presence. Power detector users — the ones using Waze at the same time — are therefore Wazers’ best allies."

Basic overview of how a DC/AC Power Inverter works

For about 15 years now, I've had a inverter that takes high-amperage direct current supplied by a battery or alternator, steps it up and converts it into alternating current for use with typical household appliances, like lighting that I use at camp.

I had a vague idea of how inverters worked, but I never knew the exact electronic process. I thought all of the voltage change was done on the alternating current side of things -- once the modified sine wave is created. It turns out that it's actually the direct current that is stepped up using a Boost Converter (a device that uses an inductor coil to step up DC voltage), while the alternating current sine wave is created towards the end of the process.

A very interesting video. I also encourage you read up about direct-current Boost Converters and their step-down equivalent, the Buck Converter.

Number of Televisions per Household

While at the turn of the century, the number of households with multiple televisions was increasing, in recent years that number has decline, and there has been a slight uptick of households with no televisions.

Data Source: US Energy Information Agency Article, Average number of televisions in U.S. homes declining.‹ Consumption Residential Energy Consumption Survey (RECS)-b1