Have you ever seen a fan resistant to dust and water

Still more noise and vibrations and in extreme case even a total malfunction – this is a typical “end” of the fan after a long-time operation in a dusty or corrosive environment. In a usual dry and relatively clean environment, this scenario is not that dramatic and high-quality fans hold on to work for many years without problems. However, it can be also said, that common industrial environment is quite fa ...

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Inside the Intel RealSense Gesture Camera

The Intel® RealSense™ gesture camera represents another foray by Intel into the consumer products space. The camera has been incorporated into the Lenovo ThinkPad Yoga 15.  Intel disclosed at IDF14 that the device is formed using three components: a conventional color CMOS image sensor camera, an infrared images sensor, an infrared light projector (the main focus of this article), plus an image processor. I ...

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Even you switch ecologically?

Do you know a situation, when a seemingly usual thing is fact not that usual... Whether it´s a car with a hybrid drive or a lot of devices which we meet every day – usually in every segment can be found something “inconspicuous” but in fact unusual and exquisite. This is exactly the case of the 1550 Eco Switch series. At the first sight – a usual rocker switch of this series is able to switch off a device i ...

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Making A SMD Reflow Oven

I have been an electronics hobbyist for many years and have always stuck with through-hole components when making a project. However as time goes by, not only are more and more components are becoming available only in SMD (surface mount device) but also more interesting projects are also SMD based. There are several options for doing your own SMD soldering: Hand Soldering - Using a fine-tipped soldering ir ...

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PCIs pelo método CNC – Making PCBs with CNC

Primeiro imprimia o desenho da placa numa folha de acetato. Essa folha era colocada por cima de uma placa foto sensível e colocada sob luz UV durante uns minutos. De seguida essa placa era submersa numa solução com soda caustica para retirar a pelicila foto sensivel que ficou "danificada" com a luz UV. A placa era depois submersa numa solução com ácido pre-coloreto de ferro. Após uma lavagem para retirar os ...

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LTC4015 – Multichemistry Buck Battery Charger Controller with Digital Telemetry System

Features Multichemistry Li-Ion/Polymer, LiFePO4, or Lead- Acid Battery Charger with Termination High Efficiency Synchronous Buck Battery Charger Digital Telemetry System Monitors VBAT, IBAT, RBAT,NTC Ratio (Battery Temperature), VIN, IIN, VSYSTEM, Die Temperature Coulomb Counter and Integrated 14-Bit ADC Wide Charging Input Voltage Range: 4.5V to 35V Wide Battery Voltage Range: Up to 35V Input Undervoltage ...

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Simple circuit lets you characterize JFETs

When working with discrete JFETs, designers may need to accommodate a large variation in device parameters for a given transistor type. A square-law equation is usually used as an approximate model for the drain-current characteristic of the JFET: ID=β(VGS−VP)2, where ID is the drain current, VGS is the gate-to-source voltage, β is the transconductance parameter, and VP is the gate pinch-off voltage. With t ...

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2.5A Bipolar Stepper Motor Driver LV8772E

Tiny Board has been designed around LV8772 IC from On-Semi. This driver is capable of micro-step drive and supports 4W 1-2 phase excitation. It has Low on Resistance with motor current selectable in four steps. The board is equipped with unusual condition warning LED and input Pulse Monitor LED. It is most suitable for the drive of a stepping motor for OA, amusements, hobby CNC, 3D printers, automatic machi ...

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2.5A Bipolar Stepper Motor Driver LV8772E

Tiny Board has been designed around LV8772 IC from On-Semi. This driver is capable of micro-step drive and supports 4W 1-2 phase excitation. It has Low on Resistance with motor current selectable in four steps. The board is equipped with unusual condition warning LED and input Pulse Monitor LED. It is most suitable for the drive of a stepping motor for OA, amusements, hobby CNC, 3D printers, automatic machi ...

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LM2596 DC-DC Converter Module Testing

LM2596 based step-down DC-DC converter modules can be bought on eBay quite cheaply for around a dollar each. But how do they perform? Is it safe to use it to power your design? Let’s find out. According to TI’s website, these LM2596 step-down (buck) regulators are sold for $1.8 each for a quantity of a thousand. So how a finished converter could be sold for just above a dollar each is quite a mystery to me. ...

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Post Project 61: KaraOkay Microphone Amplifier

Here is an all-analog, all-through-hole, cheap & cheerful preamplifier for that perennial problem of getting the microphone amplification just right, which is a challenge not only with the faithful reproduction of lead vocals during concerts and recordings, but also with campfire and karaoke-ish performances specially when the beer takes hold. The two operational amplifiers of the circuit, IC1a and IC1b ...

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More Awesome DoorBell Control

My first DoorBell Mote prototype was working nicely and it allowed monitoring the door bell (while also triggering it remotely – toddlers love it). But I wanted more. On weekends the family likes to get a well deserved nap during the day and often those pesky solicitors ring the bell and wake everyone up. So naturally the doorbell has to be disabled also, without major effort or any disconnected wires. Soun ...

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