MAKE presents: The Capacitor
Simple yet effective, they come in a dizzying array of forms and materials. Vital to so many circuits for storage, timing, and filtration – the mighty capacitor!
audio and video by Collin Cunningham
makezine.com
components
Magnetic sensors tutorial
Subscriber John Schuch writes: Threads on the MAKE forums often touch on hall effect sensors for measuring current, position, speed, etc. I just got this link in an email this morning and think it’s pretty cool. Gotta love free technical training. This is a sponsored tutorial on Digikey, sponsored by Honeywell, and promoting Honeywell’s line […]
EIA resistor values explained
Jeff, he of the mightyOhm, asks: Have you ever wondered why standard 5% resistors have strange values, like 330 and 470 Ohms, instead of nice round numbers like 300 or 500 Ohms? It turns out that standard resistor values form a preferred number series defined by the EIA. 5% values are part of a standard […]
The making of a triode
One of our most viewed and discussed postings of ’08 was Claude Paillard’s stunning triode video where he makes a vacuum tube triode from scratch. While poking around the Web, looking for other videos he might have done, I bumped into this documentary about the 2006 European Triode Festival in the Netherlands, celebrating the 100th […]
Circuit supper
I love the funny and characterful scenes that Lenny & Meriel manage to capture with their Sparebots sculptures — like this dude, obviously ready for a bellyful of button cell. Sparebots
Salt water Leyden jar
Warning: High Voltage Ahead. This Instructable shows you how to make an old-school high voltage capacitor, a Leyden jar, out of a jar of salt water. Even though this shows you how to make a small-jar capacitor, so the voltage is probably not lethal, it’ll still pack a wallop, so not something to be undertaken […]
Free electronic components and hardware
We all like getting free stuff, and as any electronics geek can tell you, you can usually get free IC samples from most vendors. But you may not be aware that you can sometimes get other free components too, such as LEDs, switches, project boxes, and other parts, if you’re a qualifying entity (business, student, […]
