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10 Jan 2015


by Husham Samir @ instructables.com:

A temperature data logger, is a portable measurement device that is able to recording temperature over a defined period of time automatically. The data can be retrieved and viewed after it has been recorded. In this device the temperature will record every one minutes in CSV file.

Temperature Data Logger - [Link]

10 Jan 2015

The new Keysight/Agilent 3000T Oscilloscope is released today, and Dave has a world first review of it.
It’s a replacement for the existing 3000A X-Series, and is essentially the same in many ways, so only the differences are
covered in this video.

A lot of features from the 4000 X-Series have filtered down, and some things are now standard.
How does it compare to the Tektronix MDO3000?

EEVblog #701 – Keysight 3000T Oscilloscope Review - [Link]

10 Jan 2015

TheSignalPathBlog @ youtube.com:

In this episode Shahriar attempts a repair of an Agilent E3642A DC Power Supply which is completely non-responsive. After presenting a teardown of the power supply, the GPIB interface is used to verify the functionality of the power supply. The problem is traced to the main display unit which communicated with the main power supply via a serial interface.

After disassembly of the display, it is revealed that the entire unit has suffered a catastrophic failure due to the VFD display drive IC. All components must be individually removed and replaced. Unfortunately the main processor is a Mask ROM IC version (80C51) and cannot be sourced. Can you help Shahriar find a replacement part?

Teardown, Repair and Analysis of an Agilent E3642A DC Power Supply - [Link]

9 Jan 2015


by elektor.com:

AtmelCorporation have announced two additions to their SAM G series of ARMCortex-M4-based MCUs. The two latest models are designated the SAM G54 and SAM G55. They feature high performance (up to 120MHz), low-power (102 µA/MHz in active mode, down to 5 µs wake-up) and tiny outline (as small as 2.84 x 2.84mm). Both are targeted at IoT applications and include all the features of the current SAM G family of devices including an Atmel | SMART ARM Cortex-M4 MCU + FPU (floating point unit) together with integrated sensor fusion algorithms.

Two new MCUs from Atmel - [Link]

9 Jan 2015


by othermachine @ instructables.com:

Hello! Welcome to another Other Machine project tutorial! I’m Sam DeRose, a former Other Machine Co. Summer Intern. I created The Nerd Watch last summer while working at OMC.

The Nerd Watch displays the time in binary when the button is pushed. The watch shows the hour and minutes by flashing two LEDs in sequence to represent two 4-bit binary numbers (in big-endian format). Here’s a great description of how to read binary numbers.

In this Instructable, I’ll show you how to build a Nerd Watch from scratch with a few electronics components, and an OMC Othermill.

This Instructable presumes you have previous experience working with surface mount electronic components, and that you are no stranger to a multimeter or soldering.

The Nerd Watch - [Link]

9 Jan 2015


by Dmitry Griberg @ dmitry.gr:

You’ve probably seen various holiday or birthday cards that play a little jingle via beeps when they are opened. Last few years have brought new ones that play actual sampled music for a dozen seconds or so. I decided, for this new year’s celebration, to make a card that, when opened, will play a complete song in full fidelity. And the song it should play should be selected randomly each time of many. The project would be housed in a normal CD jewel case. The project was further complicated by the fact that it is impossible to predict shipping times during the holidays. Thus the task was to do all this, using nothing but whatever materials and components that I already had at home. I managed to do this successfully, and the project worked well. It is not the best designed or the most efficient, but it does work.

Musical holiday card using microSD card - [Link]

9 Jan 2015


by elektor.com:

The LTM4625 from Linear Technology is a switching mode μModule (micromodule) regulator in a tiny 6.25 mm × 6.25 mm × 5.01 mm BGA package. Like many of the newer regulator designs, the package includes the switching controller; power FETs, inductor and support components. Operating over an input voltage range of 4 V to 20 V (or 2.375 V to 20 V with an external bias supply) the LTM4625 supports an output voltage range of 0.6 V to 5.5 V, set by a single external resistor. Its high efficiency design delivers up to 5A continuous output current. Only bulk input and output capacitors are needed.

Complete 5A step-down Regulator - [Link]

9 Jan 2015


by Scargill @ scargill.wordpress.com:

This article describes the ESP-01, fitted with LUA firmware that is able to converse with a serial terminal in a high level language, store programs and data, turn things on and off in a package that costs almost nothing. The possibilities for ridiculously cheap remote temperature sensors and more are finally here. The software is new, the hardware is relatively new – and we need people working on software to make remote access easy. No guarantees here as I have only tested (and reported on) some of the features. Am important fix that made this practical to use only came through in the early hours of this morning – there will be bugs but at least it’s a starting point – all you have to lose is a little time.

Probably the Cheapest WIFI Computer in the World (ESP8266+LUA) - [Link]

8 Jan 2015


by Steven Keeping @ digikey.com:

The majority of contemporary LEDs are constructed from a combination of Indium gallium nitride (InGaN) and sapphire substrate. The architecture works well and has allowed LED manufacturers to offer products exhibiting efficacies in excess of 150 lm/W. However, the architecture does have some drawbacks which have encouraged chipmakers to seek other options.

One commercially successful alternative is silicon carbide (SiC), and LEDs based on the substrate have been on the market for two years. Now a new generation of the technology has been released that promises to double the luminosity of the current brightest single LEDs and cut lighting fixture costs by 40 percent.

Silicon Carbide Substrate Boosts LED Luminosity - [Link]

8 Jan 2015


praveen @ circuitstoday.com:

This article is about interfacing pressure sensor to arduino. The pressure sensor used here is SPD005G from Smartec . SPD (Smart Pressure Device) is a series of silicon based pressure sensors suitable for industrial as well as house hold applications. These sensors are generally available in plastic inline or dual inline packaging. SPD sensors are generally available in two operation modes namely gauge type and absolute type. In gauge type the pressure is measured with respect to the atmospheric pressure. There is a small vent on the package for getting contact with the atmosphere. In absolute type, the pressure is measured with respect to vacuum. A small vacuum chamber is incorporated into the package during fabrication. Typical applications of SPD005G are medical systems, BP monitoring, air conditioning systems, process control, hand held pressure sensors etc.

Interfacing pressure sensor to arduino - [Link]





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