I have a friend who is a member of a model railroading club. He wants to replace hundreds of small energy-hogging incandescent bulbs with LEDs. He is currently using triac-based dimmers. As long as he uses an isolation transformer or completely insulates all wiring, my circuit will be a safe and simple solution to his problem. I'm going to help him with that.
I just received an almost identical lamp from Amazon.com.
Globe Electric 5240101 Fluorescent Desk Lamp, Black
The lamp is identical to the one I demonstrated in the video, except that it is black. This lamp body is ideal for the LED conversion and it costs under $15 plus shipping. I like its compact footprint and the fact that it can be folded or rotated to shine light in any direction. I bought the last one they have in stock, but Amazon says that more are on the way.
The isolation transformer is not actually part of the project. It is a safety device for people who breadboard and test line-powered circuits that are not isolated from the power line. You should have an isolation transformer already if you do this kind of work. The components that are part of the lamp itself are quite cheap. If you just build the circuit and don't breadboard it or test it with anything but a voltmeter, you won't need an isolation transformer.
Nice application, Andrew. Looks like the only significant cost here was the isolation transformer, at $21. By the way, if you or any reader has a good LED holiday light application, please send me a photo. As we did last year, we'll be running good photos of LED light strings at the holidays. Send to email@example.com.
Thanks for the kind words. I'm a retired electrical engineer, living alone with nothing else to do. I don't sit around looking for stuff to create. It just happens. I see a want or need and create a solution. This blog needs more gadget submissions from other people. My ugly face is showing up a bit too often. :-)
Are they robots or androids? We're not exactly sure. Each talking, gesturing Geminoid looks exactly like a real individual, starting with their creator, professor Hiroshi Ishiguro of Osaka University in Japan.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.