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 …
AC Electricity, electronics: series high-pass filter Read more »
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 …
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 …
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 …
Mobile phone apps: Nexus 4 onboard calculator: trig functions Read more »
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 …
Calculator usage: The ENG function on the Casio fx-260solar Read more »
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 …
Circuit analysis: The maximum power transfer theorem Read more »
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, …