|
|
Check this out a credit card sized business card and gaming console based on Arduino. It is only 1.6 mm thick (thickness of PCB) and all SMD components are fitted into milled cutouts made on the PCB.
Read more
This DIY USB travel charger is powered by two NiMH rechargeable batteries in series (2.4V DC) and uses the LT1302-5 DC-to-DC booster to derive +5V, 500mA output. The output is accessible through an USB port so that mobile devices can be simply plugged in for charging.
Read more
Microchip Technology Inc., a leading provider of microcontroller, mixed-signal, analog and Flash-IP solutions, today announced a new power monitoring IC, the MCP39F501. This device is a highly integrated, single-phase power-monitoring IC designed for real-time measurement of AC power. It includes two 24-bit delta-sigma ADCs, a 16-bit calculation engine, EEPROM and a flexible two-wire interface. An integrated low-drift voltage reference in addition to 94.5 dB of SINAD performance on each measurement channel allows accurate designs with just 0.1 % error across a 4000:1 dynamic range.
Read more
Shane Soh and Eileen Liu, students at Cornell University, designed this acoustic wayfinding device to assist visually impaired persons with navigation. It uses two ultrasonic range finders; one is head-mounted navigation system and the other is a wearable tactile sensor unit plugged on to the user’s finger. The two systems work together to sense the surrounding physical space and instructs the user to turn left or right to avoid the obstacles detected in the field of view. The project uses ATmega1284 as the main controller and three MaxBotix MB1000 units as sonar rangefinders. The head-mounted navigation system consists of two ultrasonic
Read more
This tutorial from Maxim describes the standard process of designing a radio system and various tradeoffs involved in the process. The process of designing a radio system can be complex and often involves many project tradeoffs. With a little insight, balancing these various characteristics can make the job of designing a radio system easier. This tutorial explores these tradeoffs and provides details to consider for various radio applications. With a focus on the industrial, scientific, medical (ISM) bands, the subjects of frequency selection, one-way versus two-way systems, modulation techniques, cost, antenna options, power-supply influences, effects on range, and protocol selection are explored.
Read more|
|