Self-tutoring about home electronics: the tutor shares. Using a Smart TV today, I couldn’t get the web browser to work, even though the TV itself reported being connected to the internet. I read the instructions in the support screen about…
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Category: electronics
Mobile phones, electronics: should I unplug the phone charger when not in use?
Technology self-tutoring: the tutor checks the importance of unplugging an unused phone charger. I’ve read in more than one place to unplug a phone charger when it’s not being used. Doing so I find inconvenient, but I’ve done it anyway…
Tagged with: should you unplug a charger when not in use?
AC Electricity, electronics: how a series low-pass filter works
The tutor briefly explains the low-pass filter. This explanation draws on ideas from that of a high-pass filter (see my article here). A low-pass filter sends along low frequencies but blocks higher ones. The one we’re looking at today has…
Tagged with: critical frequency
AC Electricity, electronics: series high-pass filter
The tutor gives background along with a basic explanation of how a high-pass filter works. A high-pass filter will send along high frequency signals but block low frequencies. It can do so because the impedance, Xc, of a capacitor of…
Technology: how a metal detector works
The tutor gives a nontechnical explanation of how a metal detector functions. Watching Curse of Oak Island on the History channel, you see them use metal detectors. How does a metal detector work? A basic explanation is this: The search…
Tagged with: how a metal detector works
Consumer electronics: the PNY flash drive
The tutor tells of a purchase he made. A few weeks back, one of my kids wanted to borrow a flash drive so he could load his project on it to take to school. We didn’t have any at our…
Tagged with: PNY 16GB flash drive
Mobile phone apps: Nexus 4 onboard calculator: trig functions
The tutor offers a hint about using the Nexus 4 onboard calculator for sin, cos, and tan. One of my New Year’s resolutions is to get acquainted with my mobile phone. Believe it or not, I’ve been lounging on the…
Calculator usage: The ENG function on the Casio fx-260solar
The tutor explains his recent understanding of a function he’s wondered about. I’ve noticed the ENG function on more than one calculator, but have never used it. I’ve always assumed it means “engineering”; since I’m not one, it makes sense…
Circuit analysis: The maximum power transfer theorem
From time to time, a tutor might get asked questions about electric circuits. In the context of tutoring or just for general interest, the maximum power transfer theorem is nice. I last studied electronics about twelve years ago. Ideas from…
Tagged with: maximum power transfer theorem
Electronics: how a transistor works
Tutoring science, you are naturally interested in technology. The tutor begins an exploration of electronics. A transistor is a device that can be used to control current flow. Perhaps its most recognizable application is in amplifier circuits. In that context,…
Tagged with: how a transistor works
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