TI chip manages power of ARM Cortex processors

Description   The TPS65090A is a single chip Power Management ICs for portable applications consisting of a battery charger with power path management for a dual or triple Li-Ion or Li-Polymer cell battery pack. The charger can be directly connected to an external wall adapter. Three highly efficient step-down converters are targeted for providing a fixed 5 V system voltage, a fixed 3.3 V system voltag ...

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Globalpress: Exar claims breakthrough

Description The XRP7724 is a breakthrough Digital PWM/PFM quad output programmable power management system. The XRP7724 is the first digital controller that can be considered for portable or other power sensitive applications due to the significant reduction in operating current. Patented technology allows transient performance equivalent to the fastest comparator based analog technologies ensuring output c ...

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Intersil has RS-485 transceiver running off 1.8V

Description The Intersil ISL32600E, ISL32601E, ISL32602E and ISL32603E are ±15kV IEC61000 ESD protected, micro power, wide supply range transceivers for differential communication. The ISL32600E and ISL32601E operate with VCC ≥ 2.7V and have maximum supply currents as low as 100µA with both the transmitter (Tx) and receiver (Rx) enabled. The ISL32602E and ISL32603E operate with supply voltages as low as 1.8 ...

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PIC USB HID (Human Interface Device) Interfacing

For long time, UART is the only and best way to interface with PC. It is easy to adapt and handle. Though some devices (like: GSM modem etc.) have UART on themselves, but for interfacing with PC, there is only one thing now and that is USB Introduction The purpose of this article is to explain how to interface a PIC microcontroller to a PC via the USB port. Although the concepts are universal, the examples ...

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New Device Measures Stress Levels Using Smartphones

Researchers have developed a device that uses your smartphone to monitor your stress levels. The device can use any smartphone to measure the cortisol concentration in saliva in less than 10 minutes, researchers said. "We have developed a method for measuring cortisol in saliva using a smartphone and a disposable test strip. This innovation enables anyone with a smartphone to measure their salivary cortisol ...

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An AVR microcontroller based Ethernet device

Ethernet has traditionally been a quite complex interface. All Ethernet chips until today had 100 pins or more, where difficult to find in small quantities and difficult to use from a small microcontroller with little memory. Microchip has changed the world with their new ENC28J60 Ethernet chip! The ENC28J60 is a small chip with 28 pins only and has a SPI interface which is easy to use from any microcontrol ...

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Passive device improves reliability of LED streetlights

The principle advantages of LED lighting are its long life, which can be as long as 60,000 hours, or 20 years, and inherent energy efficiency. LED streetlights have been shown to use 15% of the energy and give off less heat, while generating more light per watt. LEDs do not contain toxic chemicals such as mercury compared to high-pressure sodium lamps or mercury-vapor lamps. Because of their long lives, the ...

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SMS Based Device Control using GSM Modem

It has been a while since we published electronic engineering projects here due to the busy schedule we had in the past weeks, and this time we’re up with another interesting project. Before going through the details of this one, you may as well check our latest electronics projects for engineering students. GSM based device monitoring and control system are becoming popular these days. Here I am introducin ...

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Analog Devices AD587 10V Reference

Voltage references are a humble piece of hardware, their sole function is to provide a stable, known voltage. This constant, known value of voltage can then be used as a reference for ADCs and DACs as well as provide a precision current source.   I recently got hold of an Analog Devices AD587KN high precision 10.000V reference chip. AD587KN 10V precision referenceThis model of chip has an output value ...

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EMDP1 — Extensible Multiple Device Programmer 1 (Rev. C) using pic microcontroller

Table of Contents Table of Contents Introduction Schematics Printed Circuit Board Issues Introduction This is revision C of the EMDP1 mother board. It differs from revision B in that a 40-pin ZIF (zero insertion force) socket and an 80-pin `universal' plug have been added. This allows many chips to be programmed without requiring an adaptor board. When the `universal' plug is not enough, a specialized adapt ...

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