Author Archives: LL

The Art of Electronics: What Constitutes the Atomic Level?

via Nuts and Volts

A recurrent theme when teaching electronics to others is deciding on what constitutes the atomic level of the art; that is, should you discuss the flow of electrons, the fundamentals of Ohm’s Law and discrete components, ICs and other component-level modules, or complete devices at the system level? I guess it all depends on where you’re coming from.

Wall Light Switches: Relics of the Tungsten Age?

via Nuts and Volts

Given the increased popularity of multi-function light bulbs, it’s clear that the traditional light-only bulb and the associated 110V circuitry are on their way out. I’m not talking about the compact fluorescent (CFC) or even LED “replacement” bulbs, but smart bulbs that do much more than produce heat and light.

Indestructibles: The Lure of Tube Audio Equipment

via Nuts and Volts

My Sony integrated amp with copper chassis and huge toroidal transformers was a tour de force in my audio setup before the power mains took an indirect lightning hit. Because the microcontroller was fried, I couldn’t even get the unit to power up.

Without access to spare parts — including a new microcontroller assembly — I was at the mercy of factory certified technicians. And — because the unit was just out of warranty — I was going to be out $100 plus shipping in order to get an estimate on the repair.

When All You Have is a Hammer

via Nuts and Volts

A friend in the marketing business contacted me about a project for a local retail store. He wanted to track customer satisfaction as customers exited the store by placing an Arduino-controlled survey taker. Customers would press one of five buttons as they left, indicating their experience from Very Satisfied to Not Satisfied. My friend envisioned five buttons connected to an Arduino, an LCD display, perhaps a beeper for button press feedback, and a battery pack capable of supporting the device for a week.

Leaded Components: Reports of their death have been greatly exaggerated.

via Nuts and Volts

I’ve been reading and writing about the imminent demise of leaded components for decades. Even so, at least half of my work still involves leaded components. After all, what’s not to like? Leaded components are easy to work with. It’s easy to identify the value of a leaded resistor or capacitor with the naked eye, and leaded components are readily available.

Easing Into STEM

via Nuts and Volts

I’m often asked what the best way is to support STEM (Science, Technology, Engineering, and Math) education with electronics. At the high school level, as soon as I start talking about Arduino boards and sensors, teachers tend to run away. It’s intimidating to set up an electronics workshop from scratch. Think of all the necessary infrastructure that needs to be constructed — from multimeters and soldering irons to parts bins — and the components to fill them.