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15 Nov 2014

by EEVblog @ youtube.com

Dave investigates two very serious issues with jitter on the Rigol DS1000Z series oscilloscopes, including the DS1104Z and new DS1054Z
Some sort of modulated sampling/trigger jitter problem at 5 microsecond intervals (the “5us jitter problem”). And severe jitter with the AC coupled trigger mode, a problem which is also present on the DS2000 series scopes as well.

EEVblog #683 – Rigol DS1000Z & DS2000 Oscilloscope Jitter Problems - [Link]

14 Nov 2014

FW22KQOHQ1E72TX.MEDIUM

by Superbender @ instructables.com:

Winter just arrived. The enemy of all batteries. Last year this was the season the auxiliary battery of my T3 VW camper bus bit the dust. This likely happened because I neglected to take care of it over the winter months during which the bus is typically parked in my garage. When the auxiliary battery is really dead dead, aka croaked, it is not only not working, but it also prevents the main battery used for starting/driving of the bus to be properly charged when driving. Not a good situation if you are somewhere out in the woods and eventually need a ride back to civilization. After almost getting stuck in the boonies, I decided to build a two-channel battery cycle charger that is supposed to keep both batteries happy and healthy for these winter months. You can see this project documented here.

ATtiny85 Two-Channel Lead Acid Battery Charger - [Link]

14 Nov 2014

Re-invented robotic mobility to conquer stairs, bumps and more! The ground robotic revolution is here! Get a platform while they last!

Innovative leaders in robotics technology have recently announced the launch of their Kickstarter crowdfunding campaign to bring Ground Drone, the next evolution of ground robotics, to the market.

Ground Drone Project: A versatile mobile robotic platform - [Link]

14 Nov 2014

rf-wave-circulator

by Colin Jeffrey @ gizmag.com:

In the world of electronic components, there are many devices out there that do their job well and reliably, but are almost never heard of – even though they may be vital to equipment that plays a role in our technology-driven lives. The radio frequency (RF) circulator is just such a device: it has simply done its job as a nondescript box of gubbins buried in radio communications systems, quietly directing radio frequency signals to the places they should go. Now researchers at the University of Texas have given the RF circulator a makeover. Not only is the new prototype smaller, lighter, and cheaper, it’s also claimed to be easily adapted to different frequencies on the fly, which is something the old style circulator cannot do.

New RF circulator to run rings around old technology - [Link]


14 Nov 2014

FTDIusb3.0

by elektor.com:

The FT600 and FT601 are both USB 3.0 to FIFO interface chips supporting the USB 3.0 Super Speed (5 Gb/s) and USB 2.0 High Speed (480 Mb/s) data transfer standards. The FT600Q has a 16-bit wide FIFO bus interface and comes in a 56-pin QFN package while the FT601Q uses a 32-bit wide FIFO interface, packaged in a 76-pin QFN outline. The FT601 and FT600 support both the single-in and single-out 245 FIFO interfacing standard and the multi-channel FIFO mode which can handle a total of 8 channels (4 INs and 4 OUTs). The FIFO interface can support multi-voltage I/O (1.8 V, 2.5 V or 3.3 V) and an operating frequency of 66.67 MHz or 100 MHz (100 MHz only for 2.5 V and 3.3 V).

FTDI Launch USB 3.0 Chip - [Link]

14 Nov 2014

roostby elektor.com:

In a serious case of out-of-the-box thinking, a design team at Roost in Sunnyvale California have come up with a method to add Wi-Fi connectivity to your old smoke or carbon monoxide alarm by just swapping batteries. Your smoke detector uses a 9 V PP3-type battery right? The new Roost battery contains 9 V lithium cells together with a processor and Wi-Fi chip in the standard PP3-sized battery outline. It monitors the battery voltage and power drain to alert you via Wi-Fi and a smartphone app when the alarm has been triggered, even if you are not at home.

New Battery Smarts-up your Smoke Detector - [Link]

14 Nov 2014

FEOHNXRI24LWADC.MEDIUMrze

by DIY Hacks and How Tos @ instructables.com:

Winter is coming. So it is time to make preparations. If you live in a colder climate, you need to be concerned about the possibility of your pipes freezing. There are a lot of preventative measures that you can take such as insulating your pipes and leaving the water dripping. But for a little extra peace of mind, I designed a simple alarm that will notify me if the pipes are getting too cold and are in danger of freezing.

Frozen Pipe Alarm - [Link]

13 Nov 2014

fbd_snas643

by ti.com:

TI’s new HDC1000 integrated humidity and temperature sensor provides high accuracy and low power in a small, dust-resistant package.

Designers of building control equipment can implement accurate, energy-saving climate control in small spaces, while designers of home appliances and consumer goods can easily add humidity-sensing capabilities to their products.

High accuracy, low power

The HDC1000 consumes only 1.2 µA average current when measuring relative humidity and temperature at 11-bit resolution, once per second, extending battery life in remote applications.

HDC1000 – Low Power, High Accuracy Humidity Sensor with Integrated Digital Temperature Sensor - [Link]

13 Nov 2014

microcamera-module

by Junko Yoshida @ edn.com:

As automotive electronics takes center stage at Electronica this week in Munich, a “microcamera” module recently designed by researchers at the Fraunhofer Institute for driver-assistance applications is expected to enjoy the spotlight.

[…]

The new camera module — an image sensor with optics mounted on a printed circuit board — measures 16x16x12 cubic millimeters. It is visibly smaller than current-generation driver-assist cameras, whose edge lengths are “20x20x20 cubic millimeters (without optics),” according to a Fraunhofer press release.

CogniVue, Fraunhofer debut supersmall camera at Electronica - [Link]

13 Nov 2014

F1x600

by JIHAI ZHANG @ edn.com:

The purpose of a PLL is to generate a frequency and phase-locked output oscillation signal.

To achieve this goal, prior art essentially functioned by frequently changing the PLL output frequency according to the phase error (i.e. the faster/slower phase relationship) to generate a momentary, but not static, frequency and phase locked output oscillation signal. This frequent back-and-forth change in VCO frequency creates significant Jitter and a longer settling time because when phase is correct (locked), frequency is likely wrong (unlocked), or when frequency is correct (locked), phase is likely wrong (unlocked).

Frequency and Phase Locked Loops (PLL) - [Link]



 
 
 

 

 

 

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