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EDN Asia's top 10 Design Ideas of 2013

22 Jan 2014

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Out of hundreds of application notes published on EDN Asia last year, here are the cream of the crop:

Connect 4x3 keyboard to MCU using two I/O pins

Attaching a 4x3 keyboard requires seven digital I/O pins, which is a problem when the project is based on a low-pin-count MCU or when the MCU being used does not have enough free I/O pins. Two solutions are available: Use readily available I/O expanders, or assign a unique voltage to each key using a resistor network and then use an analogue pin to read the voltage and determine which key is pressed.

Prototyping a smart micro-grid for a solar PV system

This work is part of the fundamental blocks of the Intelligent Energy System (IES) project initiated by Energy Market Authority to explore if small non-contestable loads of buildings and homes in a district can be aggregated in a sizable capacity so that it is big enough to participate in the frequency regulation and demand response markets of the National Electricity Market of Singapore.

Break differential-drive limits for an omnidirectional robot

The design of a three-wheeled omnidirectional mobile robot is implemented in this project. To navigate to a desired location, the robot needs two types of feedback from the environment: orientation and distance traveled. An APM Ardupilot gyroscope is used to provide fine orientation reading and then send the data to the main controller, the NIsbRIO9632xt, via serial communication.

Explore new ways for LED lighting with H-bridge

The H-bridge is a classic circuit utilised for driving DC motors in a user-defined manner, such as in forward/reverse direction or PWM-assisted controlled RPM with the help of electromechanical relays. Here is a novel implementation for driving white-LED arrays directly from the AC mains in full-wave current-limited mode to realise an excellent flicker-free, energy-efficient solid-state lamp.

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