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23 Mar 2015

Teardown, Repair and Analysis of an HP 8562B 22GHz Spectrum Analyzer - [Link]

20 Mar 2015

obr1378_3

With Sensirion humidity and temperature sensors you can be sure of what you measure. Moreover, now we´ll support your development by free samples.

Top-class calibrated humidity and temperature sensors Sensirion already gained many fans. Mainly thanks to a fact, that they´re not only “sensors” but a ready-made solution with a pre-amplifier, ADC and other circuits, which directly provide a final value in a digital form. That´s why it´s not necessary to solve input portion (noise, shielding, power supply, length of wires,…). Moreover, their long-term stability is verified in a praxis.

Features and usage of Sensirion sensors was introduced to you in many our articles. In the Sensirion portfolio can be found easily solderable types on a small PCB like for example SHT11(15) or SHT71 (75), as well as miniature types in SMT DFN packages like for example SHT21 (25) and also the new SHTC1. Small DFN package is practically impossible to solder manually, but it´s relatively easily manageable by means of a solder paste and a hot-air soldering station or ideally by a reflow in a hot-air oven.

Maybe, you´ve already noticed, that in many articles we also bring you a contest with a possibility to win free samples of a given component. We usually draw by lots 1-10 winners, which will directly receive free samples.

Still, if you´re seriously interested to try a given sample for a development of your (industrial) application, please contact us by e-mail. In many cases, we can provide you a given sample even if you wasn´t one of lucky winners of the contest.

Evaluate the Swiss precision for free! - [Link]

20 Mar 2015

2014-12-19+16.20.02

by vaupell:

I am experimenting with RF and IR signals in various frequencies and had some trouble with the receivers and needed to see what kind of signal i was receiving. I cannot afford a real oscilloscope but i knew about the older Arduino oscilloscopes.

After trying many different versions of code and tutorials, I was unable to get a single one to work, and all the tutorials and guides around was 2-3 years old. Not sure if it is the IDE or the actual hardware that has changed in such a way that it didn’t work anymore.

I finally found a working oscilloscope from a Japanese website, (linked below) and a working TFT screen library, meaning i could read the various signals received.

A simple DIY Oscilloscope with Arduino Uno and Mega - [Link]

20 Mar 2015

fingerpiezosensor

by ohnitsch.net:

While trying to create a circuit that detects whether water is flowing through a pipe by measuring the vibration with a piezoelectric sensor, just to see what happens I taped the sensor around my finger and – to my surprise – got values that were a very noise-free representation of my heart rate!

Measuring Heart Rate With A Piezo - [Link]


20 Mar 2015

Mini_Stereo_Audio_Amplifier

The dual low power amplifier built around TDA2822 8pin DIP. IC, it is mainly designed to use in portable players, radios and other building block project. A 3V supply can be used to drive headphones providing 20mW in 32 Ohms per channel, and a 12V power supply will provide 1W in 8 Ohm per channel for small loudspeakers.

Mini Stereo Audio Amplifier - [Link]

20 Mar 2015

6.5W_Stereo_Audio_Amp

The 6.5W Stereo Audio Amplifier project built around TDA2004 IC. The TDA2004 is a class B dual audio power amplifier, specifically designed for car radio applications etc.

6.5W Stereo Audio Amplifier - [Link]

20 Mar 2015

10W_Stereo_Amplifier_PIC

The project built around Philips TDA1521 IC, The project provides high quality audio 2X10W Audio output. The device is especially designed for mains fed applications, (e.g. Stereo TV Sound and Stereo Radio). The circuit designed for asymmetrical power supply systems.

10W Stereo Audio Amplifier - [Link]

20 Mar 2015

NICAD_NIMH_BATTERY_MONITOR

The simple project can be used as test gear. Its easy way to monitor the battery voltages, especially dry cell, NICAD, NIMH, supply up to 1.5 Voltage. Battery Monitor range 0.15V to 1.5V. The project is built around Texas instruments LM3914, The LM3914 senses the voltage levels of the battery and drives the 10 light emitting diodes based on the voltage detected on input connector. Circuit works on 5V DC. J1 Jumper is used to select the DOT mode or bar graph mode.

NiCad-NiMh Battery Monitor - [Link]

19 Mar 2015

FTDERE0I7CCFR2H.MEDIUM

by mi.vasilakis @ instructables.com:

Today I will show you how to make your own arduino compass by using the MHC5883L 3-axis digital compass board.

I prefer to build my own arduino based circuit by using the ATmega328p uno possessor, but this is optional for you. Buttons are used for turn on or off display leds and to change display mode of compass.

Arduino Digital Magnetic Compass – HMC5883L - [Link]

19 Mar 2015

Fairchild_FL7734

Fairchild announced the FL7734 Phase-Cut Dimmable Single- Stage LED Driver, a highly integrated LED controller solution for low-cost, and highly reliable LED lighting solutions from 5 W to 30 W. The FL7734 enables designers to quickly achieve great light quality designs with high dimmer compatibility while integrating full power factor correction (PFC) circuitry to meet power factor (PF) and total harmonic distortion (THD) requirements.

The FL7734 solution uses Fairchild’s unique active dimmer driving technology to eliminate visible flicker or shimmer symptoms and deliver over 90% dimmer compatibility with a variety of leading edge, trailing edge and digital dimmers from a wide range of manufacturers. The solution fully meets NEMA SSL 7A-2013 & ENERGY STAR® standards and provides a programmable dimming curve and input current management flexibility.

Fairchild Simplifies Dimmable LED Lighting Design - [Link]



 
 
 

 

 

 

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