Control of up to 680 pixels on any of the popular LED strips from any device with a USB port! One controller to rule them all!
Working with addressable LED strips, we’ve found that the extra components required to communicate with and power them complicate designs and limit the options for how they can be used. Each chipset requires its own special protocol and supporting hardware components. This is where the AllPixel comes in. Think of it as a video card for your LED strips.
AllPixel – USB Interface For All Your LED Needs - [Link]
by Ben Coxworth @ gizmag.com:
Someday soon, your milk carton may be able to tell you that the milk has spoiled, or your bandage may indicate that it needs changing. These and other things could be made possible by a new technique developed at Singapore’s Nanyang Technological University, which allows disposable electronics to be printed on a variety of surfaces, using an existing T-shirt printer.
Disposable electronic circuits produced with a T-shirt printer - [Link]
by Haifeng Fan @ edn.com:
Isolated DC/DC converters are required in a broad range of applications including power metering, industrial programmable logic controllers (PLCs), insulated-gate bipolar transistor (IGBT) driver power supplies, industrial fieldbus, and industrial automation. These converters often are used to provide galvanic isolation, improve safety, and enhance noise immunity. Moreover, they can be used to generate multiple output voltage rails including dual-polarity rails.
Understanding isolated DC/DC converter voltage regulation - [Link]
The NXP Flyback SMPS Design Tool helps you design flyback power supplies using NXPs TEA1721, TEA1723, TEA1733 and TEA1738 family. The TEA1721(A, B, D, F) family, the TEA1723(A, B, D, F) family, the TEA1733(A, B, C, M, L) family and TEA1738(F, G, L) family are low cost Switched Mode Power Supply (SMPS) controller IC’s intended for flyback topologies.
The latest update of the tool combines the TEA172x family and the TEA173x family into one tool. It comes along with a new style and an improved flow. Now it is also possible to export all design parameters, results and graphs automatically into an Excel sheet for post-processing or presentation purposes. Furthermore the database of transformer cores is extended.
Flyback SMPS Design Tool - [Link]
by Susan Nordyk @ edn.com:
Offered with fixed output voltages of 4.75 V, 5.0 V, 5.25 V and 5.5 V or an adjustable output voltage, the MIC2875 and MIC2876 2-MHz boost regulators from Micrel are capable of supplying up to 2 A of output current, while occupying just 122 mm2 of board space. These synchronous regulators also achieve efficiency of up to 95% and are well-suited for operation from a single-cell lithium battery and providing power to applications such as USB on-the-go and HDMI hosts, tablets, and smart phones.
The low-profile devices offer bidirectional load disconnect to prevent current flow between input and output when the regulator is disabled. Under light loads, the parts reduce the switching frequency to extend battery life. Other features include bypass mode operation when the input voltage exceeds the set output voltage and an anti-ringing switch to minimize EMI issues during discontinuous mode.
Tiny boost regulators deliver up to 10 W - [Link]
by Stephen Evanczuk @ digikey.com:
Pulse-energy-harvesting applications convert bursts of energy to sufficient power for operating simple circuits such as wireless switches, wireless data loggers, remote controls, and the like. To build these designs, engineers can draw on a wide variety of available ultra-low-power ICs and energy transducers from manufacturers including EnOcean, Linear Technology, Linx Technologies, Maxim Integrated, Measurement Specialties, Microchip Technology, Mide Technology, ROHM Semiconductor, Schurter, Silicon Labs, and Texas Instruments, among others.
Powering Circuits through Pulse-Energy Harvesting - [Link]
by praveen @ circuitstoday.com:
This article is about a simple auto ranging ohmmeter using arduino. The measured resistance is displayed using a 16×2 LCD display. The circuit is sufficiently accurate and uses minimum number of external components possible. Before going into the details of this project, lets have a look at the basic resistance measurement method.
OhmMeter using Arduino – with Auto Ranging Feature - [Link]
An app note (PDF!) from Renesas on how to minimize power consumption when sensing switch inputs
A switch input is one of the simplest interfaces to an MCU. However, when very low power designs are needed the pullup or pulldown resistor for the switch can draw a significant current. If the switch input is a momentary switch the current flow is very short so it is rarely significant. However, if the switch input is a door switch or level sensing switch
or any other switch which may remain in the active state for a relatively long time the energy used must be considered
Most of the discussion that follows gives examples for pull-up devices with the switches, the same principles apply for pull-down components. Also all the discussions assume that the EVdd = Vdd (all ports powered from the same supply voltage).
Minimizing power consumption when sensing switch inputs - [Link]
Webinar introduced UDOO as a powerful single board embedded SBC based on the powerful Freescale i.MX6 chip, which offers complete and powerful platform for your applications.
Looking for a powerful platfom for your Linux applications? - [Link]
The LTC®4121 is a 400mA constant-current/constantvoltage (CC/CV) synchronous step-down battery charger. In addition to CC/CV operation, the LTC4121 regulates its input voltage to a programmable percentage of the input open-circuit voltage. This technique enables maximum power operation with high impedance input sources such as solar panels.
An external resistor programs the charge current up to 400mA. The LTC4121-4.2 is suitable for charging Li-Ion/ Polymer batteries, while the programmable float voltage of the LTC4121 is suitable for several battery chemistries.
LTC4121/LTC4121- 4.2 – 40V 400mA Synchronous Step-Down Battery Charger - [Link]