You need a certain inductance and looking for the corresponding number of turns, but don’t have the equations on hand or do not have all the data on the cores you have. What do you do? The answer is to use Mini Ring Core Calculator software. It can do calculations for all kinds of inductors (Iron Powder Cores (AMIDON), Unknown Cores, Air Cores, Ferrite Cores (AMIDON), Ring Cores from EPCOS, Ring Cores from Ferroxcube (Philips)). In addition there are tools to help determining permeability of unknown cores. Who needs such a calculator? – Radio amateurs and other electronics hobbyists, who are still home brewing. The software is free and runs on Windows. When working with homebrew inductors, keep this program and RLC meter nearby.
Mini dB calculator is a dB-Calculation for the experimenting radio amateur. Pick that software as well. It can do all kind of dB calculators stating from voltage to dB conversions to cable loss and EIRP/ERP calculations.
Have a bad habit of overwhelming Firefox with a few dozen too many tabs? So you keep open tabs like libraries keep books… Aren’t you afraid Firefox will consume all your memory? Don’t you fear browser restarts because it takes so long to reload all your tabs?
EEVblog #106 – Top 5 Tips To Bring Your Product to Market is an interesting video to look at. It tells that releasing your design open source, and selling kits or pre-build boards sounds like a really good way to avoid the hassle of trying to sell my idea to other businesses. Patents don’t stop people from copying the design, surely a CC-license equally doesn’t stop people copying either, but in a niche market this is usually not a big problem. Think about it.
It takes quite a bit of time until the first phones using this new OS will come to market and how markets react to this. Vic Gundotra from Google already commented “Two turkeys do not make an Eagle” before the announcement. I think this was a better deal for Microsoft than for Nokia. Let’s see how well those turkeys are baked on the next Thanksgiving Day.
Was this Microsoft deal a good move or not is hard to say yet. I fear the worst. Some time ago Nokia’s outgoing head of smartphones Anssi Vanjoki Using Android like ‘peeing in your pants for warmth in winter’: Temporary relief is followed by an even worse predicament. Would using Windows Phone be like getting something else on your pants for temporary warmth?
The 555 Timer IC is an integrated circuit (chip) implementing a variety of timer and multivibrator applications introduced in 1971. The 555 part is still in wide use, thanks to its ease of use, low price and good stability.
555 Contest claims to be biggest, newest, most-independently conceived 555 timer design contest the world has ever seen! The organizers of the contest are interest in seeing new designs and creativity blossom. Now it is time to act because all entries must be submitted by March 1st, 2011. Yeah, it’s quick, but the world moves fast. And remember that “You’ve got 8 pins…and one shot.” So visit http://www.555contest.com/ for more details.
The allocation of the final IPv4 addresses is analogous to the last crates of a product leaving a manufacturing warehouse and going to the regional stores or distributions centers, where they can still be distributed to the public. Once they are gone, the supply is exhausted. It’s only a matter of time before the Internet Service Providers (ISPs) must start denying requests for IPv4 address space.
This is not the IPocalypse. The Internet technical community has been planning for IPv4 depletion for some time. IPv6, a new Internet Protocol with a massive amount of address space, is already taking over as IPv4 runs out. For most users, all it means is that your computer’s IP address today might look like 192.0.2.10 (an example IPv4 address), but soon it may resemble 2001:0DB8::/feed:b766 (an example IPv6 address).
The next big event for IPv6 deployment is World IPv6 Day on 8 June, 2011. The goal of this Test Flight Day is to motivate organizations across the industry – Internet service providers, hardware makers, operating system vendors and web companies – to prepare their services for IPv6 to ensure a successful transition as IPv4 addresses run out. Want to find out your IPv6 readiness? Use this test.
LEDs Deliver More from Less article tells that LEDs continue to penetrate automotive lighting applications due to their long life and design flexibility.
LEDs continue to penetrate automotive lighting applications due to their long life and flexibility of use for body styling and interior design. LED lighting, used for the headlights, daytime running lights and turn signal indicators, allow for much greater design flexibility than that of either Xenon or incandescent light bulbs. This permits the body designers of an automobiles front end to do things that they could never do before.
The headlight itself has been the elusive goal of LED adoption in an automotive environment. The main reason for this has been the thermal design aspects of the LEDs and their associated driver circuits.
A high power, or high brightness LED’s light output has already exceeded the critical milestone of 100 lumens per Watt (lm/W) (15 lm/W for a typical 60W bulb).
LEDs Deliver More from Less article shows how a 25W white LED headlamp can be configured using an array of 18 LEDs in series with 350mA of current passing through them to produce the necessary light output. This kind of configuration can really live up to their promises and be effective headlamp.
Same can’t be said on the drop-on replacement products for normal light bulbs. My earlier LED car lights article shows how they do not live up to their promises and do not meet the regulations on car lights.
So if you want to have LED headlight on your car you need to have a new headlight design specifically designed for LEDs in mind.