1kHz Chebyshev Filter

The Chebyshev filter features a steep roll-off, but has ripple in the pass band, so it is not suited for audio signal use, where a flat response is ideal. The roll off is so fast that the common definition for cut-off frequency does not work for Chebyshev filters.  For this type of filter the cutoff is defined as the frequency at which the response falls below the ripple band. This filter is good for removi ...

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Leave an excess heat to Fischer heatsinks

Precise heatsinks from the production of Fischer Elektronik will take care for your devices to stay "cool". Over 40 years of experience of company Fischer reflect in an excellent reputation and mainly in a stable high quality of their products. Main production portfolio consists of heatsinks, connectors and enclosures. Narrow specialization on mechanical and electromechanical components is reflected just in ...

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Spining BLDC motors at super Slow speeds with Arduino and L6234

First of all You won’t find here any information on high speed BLDC motor driving. For that purpose You need to know rotor’s position, so You have to measure back-EMF or use Hall sensors (not needed here). For basic info about driving BLDC motors here is best “classic” articles on internets: Driving a three-phase brushless DC motor with Arduino – Part 1. Theory Driving a three-phase brushless DC motor with ...

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CarTracker – GPS Car locator

Have you come out of a store and said to yourself, where did I park my car? Well, I have. Now, there are a lot of smartphone applications that can help you locate your car but smartphones are expensive. So this Lazy Old Geek (L.O.G.) decided to make my own. HowItWorks: When you park your car, you press the button, car tracker calculates the car location GPS coordinates and stores them in EEPROM so the car t ...

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Wearable wireless goes Bluetooth Smart

Shipments this year for wireless semiconductors in health and fitness will reach a projected 61.2 million units, up 11% from 55 million in 2013, and will increase to 95.78 million units in 2018, says IHS, while shipments  of consumer health and fitness devices with integrated wireless connectivity will grow to an estimated 75.7 million units in 2018, up from 23.0 million units in 2011. Bluetooth Smart is th ...

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Spansion DC-to-DC power management IC supplies three power channels

Spansion is sampling its S6AP412A series of multi-channel DC-to-DC power management ICs (PMICs) and expects to have production volumes available in September starting at $3.60 in volumes of 1,500 units. The S6AP412A series — an expansion of the Spansion MB39C031 family of DC-to-DC buck-converter, programmable PMICs — supplies three channels of power on a single chip to cutting-edge system-on-chip (SoC) prod ...

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Euro 6 regs will boost car engine sensors

The new Euro 6 car emissions standards coming into force in September will require at least 20 sensors per auto engine, says IHS. Most of the new sensors are related to exhaust aftertreatment because of new emissions laws with NOx reduction a focus alongside that of carbon dioxide. As a pollutant, NOx has long been a stronger focus for US legislation, which also dictates that the emission parameters are mea ...

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ARM’s v8 gets 50 licences and is going for 100

v8, ARM’s 64-bit processor architecture, is being widely adopted. Seven licences were signed in Q2, making 50 in all. “50 v8 licences signed – 100 to go,” says ARM evp Pete Hutton. v8 seems set to deliver royalties quite quickly. Three chip-makers have announced 64-bit chips to go into the server and networking markets. One is the 48 core v8 64-bit 2.5GHz Cavium processor called ThunderX. “ThunderX will ena ...

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Bell Lab opens in Cambridge

Alcatel-Lucent’s Bell Labs has opened a communications research lab in Cambridge to look at real-time delivery of video to connected devices, such as smartphones, games consoles, tablets and smart TVs. Research at Cambridge will focus will be video and real-time cloud content delivery. The Bell Labs team, led by Bo Olofsson, will be co-located with the headquarters of Alcatel-Lucent’s IP Video business, whi ...

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Perovskite solar cells in three years, from UK inventions

Solar cells using upstart ‘perovskite’ materials will be shipping in three years, according to University of Oxford spin-out Oxford PV. Photovoltaic perovskites were only invented recently. “It is the fastest-improving solar cell material ever,” CEO Kevin Arthur told Electronics Weekly. “It has taken silicon 25 years to get to 20% efficiency. Perovskites go to similar efficiency in two years.” It is thin-fi ...

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