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1 Sep 2014

lt8310

by elektor.com:

The LT®8310 is a resonant-reset forward converter controller that drives an external low side N-channel MOSFET from an internally regulated 10V supply. The LT8310 features duty mode control to generate a stable, regulated, isolated output using a single power transformer. With the addition of output voltage feedback, via opto-coupler (isolated) or directly wired (nonisolated), current mode regulation is activated, improving output accuracy and load response. A choice of transformer turns ratio makes high step-down or step-up ratios possible without operating at duty cycle extremes.

100 V Forward Voltage Controller - [Link]

31 Aug 2014

geiger-counter

A Geiger counter, also called a Geiger-Muller (GM) counter, is a type of particle detector that measures ionizing radiation. It detects the emission of nuclear radiation: alpha particles, beta particles, and gamma rays by the ionization produced in a low-pressure gas in a Geiger-Muller (GM) tube, which gives its name to the instrument.

A High Voltage generator (U1, U2, Q1, T1, and associated components) powers a GM tube. A pulse from the GM tube is interfaced through Q2 and U1 to pulse-generator U3, which drives a speaker.

Geiger Counter - [Link]

31 Aug 2014

IMGP10016-600x450

madworm writes:

Just wanting to share one of my latest projects, made possible by DirtyPCBs. I got a lot of good boards (actually 2 designs) and saved 25$ using this service. Very nice.
It’s a simple thing, just a micro (ATmega168) + a bunch of WS2812B LEDs. Main purpose: more colours :-)
It’s meant to fit nicely into IKEA Samtid lamps, runs with 5V DC and takes up to 2.75A. The control module is removable, so one doesn’t have to rip the lamp apart every time you change code. I used microMaTch connectors, as they’re somewhat low profile, at least compared to standard headers, and provide quite good mechanical support.

[via]

IKEA Samtid mood-light upgrade - [Link]

31 Aug 2014

B002

This project is a message recording board capable of recording 120 secs of audio. This project is designed around ISD25120 which can store 120 Seconds audio. Recording and playback operations are controlled with tact switches. The kit has an onboard microphone and LED to indicate the functions of Play and Recording. IC has a re recordable non-volatile memory which means that the message will be stored even after the units are turned off and even when it is turned on again.

120 Seconds Voice Record – Play Back - [Link]


31 Aug 2014

cmos-sensor

by elektor.com:

Cambridge Sensors Ltd have announced the appointment of the ASE group to assemble and test there latest tiny (currently the world’s smallest) gas sensor. The 2.0mm x 3.0mm cavity DFN package developed together with ASE enables the integration of gas sensors into devices such as smartphones, tablets and wearable devices where it has previously not been physically possible.

The CCS800 product family of ultra-low power miniature gas sensors can be used for detecting Ethanol (Alcohol) and hazardous gases such as Carbon Monoxide (CO) and a wide range of Volatile Organic Compounds (VOCs) including Formaldehyde. According to Fuyu Shih the vice president of ASE Europe: “The Global emergence of sophisticated electronics geared towards improving lifestyle and efficiency is fuelling the sensor market, making it one of the fastest growing areas of innovation within the semiconductor industry”.

Smartphone Nose - [Link]

31 Aug 2014

Step_Up_DC-DC_photo_th

This project has been designed around Texas Instrument’s LM2623 IC, The LM2623 is a high efficiency, general purpose step-up DC-DC switching regulator for battery powered and low input voltage systems. It accepts an input voltage between 2.4V to 12V volts and coverts it into 5V DC. Efficiencies up to 90% are achievable with the LM2623.

2.4V to 5V Step Up DC-DC Converter - [Link]

31 Aug 2014

obr1577_1

New 1,4“ round display module from company 4D Systems with a round pixel placing is able to truly display various analog variables.

The evolution sometimes shows, that not everything “new” is automatically better than something „well-proven“. One of examples was also a „boom“ of digital panel meters, when it seemed for a while, that the life of analog panel meters is coming to an end. However it showed very soon, that an analog display has a huge advantage in a very fast legibility – i.e. already a brief look at a meter is enough to realize the position of a needle of a meter. Naturally, accuracy of reading of value from an analog meter is lower, than that of a digital (7-sgment) display. mainly at the beginning of a range, but this doesn´t matter in many cases and a certainty of a fast check, whether for example a given variable is in normal is often much more important.

Fortunately, classic electromechanical panel meter can be replaced by graphic displays thus obtaining a free hand at design of your own panel meter. At the same time, the combination of an analog and a digital meter can be created this way. Perhaps the best “replacement” for analog meters is a round display, which has a minimum space requirement in a target device. Novelty in this segment is the uLCD220RD (round) display module with a circle active surface (circle 220 px, 1,38“). Despite the fact, that it´s a small size display, it´s driven by the most powerful processor from 4D Systems – Diablo 16, which gives it a big versatility of usage, many interfaces and GPIO pins.

New version of a well known SW package for development of graphic applications – 4D Workshop IDE from 4D Systems already supports this new module even in the Visi Genie environment, enabling a „drag&drop“ development of application. In praxis a 220 px circle is able to display a considerable amount of information. On attached pictures we bring you a small demonstration of uLCD220RD module imaging.

Detailed information will provide you uLCD220RD and Diablo16 datasheets.

Round panel meter by means of a display? - [Link]

29 Aug 2014

A tutorial on feedback resistors in DC-DC converters and how to build a high current adjustable power supply using an LM2678.

Build a 2.5V to 14V 3A adjustable power supply! - [Link]

29 Aug 2014

A look inside Flir’s thermal imaging add-on.

Flir One teardown - [Link]

29 Aug 2014

What’s inside a dial-in pacemaker monitor system?

EEVblog #656 – Pacemaker Monitor Teardown - [Link]



 
 
 

 

 

 

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