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20 Feb 2015

ISS_above

by Liam Kennedy @ kickstarter.com:

Raspberry Pi gadget lights up when International Space Station is nearby with Live HD video from the ISS now with Wearable LEDs

The original version of the ISS-Above was funded through a successful Kickstarter nearly 1 year ago. Since then more than 800 ISS-Above’s have been installed worldwide.

At the heart of the ISS-Above is the lovable and successful single board computer called a Raspberry Pi. Over 5 million of these little computers have been sold worldwide.

The ISS-Above functionality has been drastically improved since the first Kickstarter with some truly remarkable new features – including the display of live HD video views of the earth directly from cameras on the International Space Station.

ISS Above HD+ with Wearable Bluetooth Low Energy LEDs - [Link]

19 Feb 2015

IMG-20150218-WA0004-2-1024x979

by Francesco Truzzi @ b.truzzi.me:

I needed a small, fast and reliable multi-voltage level translator (mainly for connecting ESP8266 boards to the Arduino, got tired of resistor networks pretty quickly) so I built a breakout board for TI’s LSF0204(D).

Datasheet and info here.

The LSF0204 is a nice little chip. It can translate up to 4 signals to and from the following values:

1.0 V ↔ 1.8/2.5/3.3/5 V.
1.2 V ↔ 1.8/2.5/3.3/5 V.
1.8 V ↔ 2.5/3.3/5 V.
2.5 V ↔ 3.3/5 V.
3.3 V ↔ 5 V.

[via]

LSF0204 breakout board: a bidirectional, multi-voltage level converter - [Link]

13 Feb 2015

The Twin-T narrow-band notch filter has an RC network that look like twin T’s.  An effective attenuation at a given frequency can be obtained with the Twin-T design.  The Q factor for this passive filter design  is about .25; to get a larger Q factor, an active design is necessary.  The Twin-T design works by phase shifting the input 180 degrees out of phase in the legs of the circuit and adding them again at the output to cancel at the desired frequency.

Twin-T Notch Filter - [Link]

12 Feb 2015

finshed_pcb

by acidbourbon @ acidbourbon.wordpress.com:

Soon after I played around with some simple sequencers and multiplexers to generate more complex sound patterns. I thought it would be cool to have a device to gate oscillators or switch multiplexers with a random sequence. But the the output should change at a defined rate. Can we build a simple random pattern/number generator that works synchronized with an external clock signal? I believe so.

Clocked 8-bit random pattern generator for CMOS synth - [Link]


29 Jan 2015

ExperimentersBoard_6

Raj over embedded-lab.com has build a prototyping board that facilitates the building of simple circuits. It includes a regulated power supply for both 3.3V and 5V, four output LEDs, four input switches, a buzzer, a potentiometer and an onboard breadboard. Using this board you can fast prototype your next project.

Experimenter Prototyping Board for easy circuit build - [Link]

17 Dec 2014

ymUErJ4fFUhPWSEO

by ifixit.com:

Double the iPhone, double the teardown! With the iPhone 6 Plus laid out for inspection, we turn our attention to the smaller iPhone 6—though at 4.7″, it’s still a giant among iPhones. What was so big that Apple couldn’t fit it into the familiar form factor? Let’s shake it out onto the teardown table and find out!

iPhone 6 Teardown - [Link]

12 Dec 2014

The MAX5825PMB1 peripheral module provides the necessary hardware to interface the MAX5825 8-channel DAC to any system that utilizes Pmod™-compatible expansion ports configurable for I²C communication. The IC features eight independent 12-bit accurate internally buffered voltage-output DAC channels. The IC also features an internal reference that is selectable between 2.048V, 2.500V, and 4.096V (4.096V reference operation is not supported with a standard 3.3V Pmod-port power supply).

MAX5825PMB1 Peripheral Module Board - [Link]

 

8 Dec 2014

Dave dissects and then powers up the Tektronix TDS220 oscilloscope used in the Mud Run. Did it survive?

EEVblog #690 – TDS220 Oscilloscope Autopsy - [Link]

3 Dec 2014

PREMOBOARD is a expansion board to expand your networking/embedded experience.

PremoBoard can be controlled by any system via the USB port: it is an expansion board designed for (but not limited to) cubieboard (A10 or A20).

PremoBoard is a expansion board featuring the following:

– 4 USB 2.0
– 2 LAN 10/100
– 2 WIFI (OPTIONAL)

Premoboard - [Link]

3 Dec 2014

LPC812

The Smartphone Quick-Jack Solution repurposes the standard 3.5mm stereo audio jack found on most smartphones into a self-powered data channel that makes communication with these smartphones as easy as plugging a headset jack into the audio port. The hardware/software platform is designed for iPhone® and Android® smartphones. This project will make it easy to connect external devices into a phone. It gives smartphones application developers an easy way to add context-aware application features, input user and environment data, or connecting peripherals. And also provides end-product designers instant access to smartphones’ convenience, appealing user interface, and cloud connectivity.

This project is compatible with both Open Mobile Terminal Platform (OMTP) and American Headset Jack (AHJ) standards; the hardware identifies the type of headset automatically and configures the hardware accordingly. First, a comparator circuit detects the type of headset port Quick-Jack has been inserted into. The result is interpreted by the LPC800, which then configures an analog switch accordingly. The analog switch connects the right pin of the jack plug to the right signal on the circuit board (GND/MIC). Read the rest of this entry »



 
 
 

 

 

 

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