The final prices may differ from the prices shown due to specifics of VAT rules About this book "I wrote this book because I love building robots. I want you to love building robots, too. It took me a while to learn about many of the tools and parts in amateur robotics. Perhaps by writing about my experiences, I can give you a head start. There is a mix of content: from serious reference tables and descriptions to personal stories and humorous bits.
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My toolbox has an LED tester and magnifier light, so why not add a convenient 5V regulator cap to the collection? There are nicer ones on the market that have surface mount components, but half the fun of an electronics hobby is creating something basic in your own style. This double-decker board with flashing LED power indicator allowed me to experiment with flush battery snaps and board interconnects.
Mercury Battery Replacement Regulator Several decades ago, mercuric oxide button cells were common consumer power sources. Tinkerers have come up with a variety of solutions for many devices. Perhaps modern technology can address a few more with an itty-bitty 1. The new wire arrives without a spool, which necessitates printing a spool on a three-dimensional printer. The spool is easy enough to model but consumes the day with a six-hour print time. Thus, old-fashioned wooden clothes pin attached to a base become the project being worked on rather than whatever I needed that wire for in the first place.
An LED illuminates the paper disc, which reflects varying amounts of light into the light sensor as the disc rotates on the turntable see the video for a demonstration. The circuitry is fairly simple and uses commonly found parts.
Can you guess the waveform generated by the thumbnail image? The end result is a functional tool with a couple of improvements, but not as crisp, due to the limitations of home fused-filament resolutions. Unfortunately, the commercial LED bulb I received was defective and had a flickering power supply. Hacking in six additional smoothing capacitors and replacing a missing LED solved the problem.
Identifying Bad Capacitors If your consumer electronic device is failing, it is often caused by old, overheated, or defective capacitors. If you open up the case and inspect the capacitors, you may find some that are bulging, crusty, or are lifting off the PCB. Here are some photographs of damaged CapXon brand aluminum-electrolytic capacitors found inside failing Samsung LCD monitors.
Also included is a photo of a good capacitor that has beneficial goop surrounding it. Well, supposedly it forms beautiful crystals, just not for me. See examples of clay casting failures and chipped surfaces as I muddle my way through trying to make anything out of bismuth. Sun Tracker Failed Project Sometimes you gotta know when to walk away -- which was eight years ago. I dug up this robot that was supposed to emulate a sunflower tracking the sun. Due to a design flaw in an overly complicated analog sensor bus, and general ugliness, this project got literally shelved.
Now it sees the light of day, if only to be a lesson to others. Mounting an iPad for Desk-Based YouTube Videos For many hobbies, an overhead shot of your desk or workbench is the ideal view for your videos. This is unwieldy for tripods, but suitable for a desk swing arm. Similar to a desk-mounted magnifier light, the camera can be quickly positioned at various distances, and can be swung away when not in use.
The single arm does not tend to block room lighting. Take a look at my tablet-mount setup, and see how the arms were extended to fit a larger form factor. How well does that old microscope compete against a modern 16 megapixel camera with macro lens, extension tubes, tripod, linear table, linear slide, remote shutter, 28 LED ring light, and stacked photography software?
In fact, exactly small of details can we clearly see with a modern rig?
Robot Building for Beginners
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