Recent Articles
UC00A – USB to UART Converter
By SC Lim, RH2T Mag Volume 4, March 2010 Need an effective way to establish communication between an embedded system and your computer? You are probably well acquainted with USB as the interface used by mice, keyboards, drives, cameras and other mass-market peripherals, but USB is also versatile enough for use in embedded system. …
SK28A – Temperature Sensor with Fixed Voltage Reference
LM35 are commonly used due to its simplicity and linearity which is 10mV per Celsius. The output of the LM35 is connected to an ADC input in a microcontroller, and the result is processed inside. In this project, we will use SK28A to demo the functionality of LM35 by using Fixed Voltage Reference
SK28A – RGB LED Mood Lamp
This project uses SK28A to show the RGB LED. The RGB LED is a special type of LED which can emit three coloured lights, which are the Red, Green and Blue, hence the RGB acronym. When one of these colours mixed together it will give you another new colour. By using the microcontroller’s PWM channels to drive the LED, you can control the intensity of each colour which can give you many shades of different colours.
How Does Stepper Motor Works – Part 2
BY: SC Lim, RH2T Mag, Volume 3, Dec 09 Part 1 covered the characteristic, ratings and specifications, fundamentals of operation, and different types of stepper motor. This time, we’ll cover the drive methods. Topic Review Stepper motor is a rotational positioning actuator designed to produce motion in “steps” (basically 200 mechanical positions …
Low Cost Wireless UART
By: Kong Wai Weng RH2T Magazine Vol.6, Sep 10 We have been receiving a lot of emails asking us how to use the low cost RF module for wireless communication. In this article, we discuss some tricks and tips on how to make the low cost wireless communication as reliable as possible. …
LCD: Interfacing with PIC Microcontrollers Part 2
By SC Lim RH2T Mag, Volume 5, Jun 2010 In previous issue, we discussed the general hardware structure, control pins, hardware connection, RAM and registers, and finally the instruction sets of the standard LCD module. Now let’s practice what we’ve learnt! LCD Initialization In this part, we will see …
MC40SE, Controller for Line Following Robot
Last month I talk about Remote Controlled Mobile Robot using MC40SE, this month I want to use it for simple line following robot. MC40SE, Advance Mobile Robot Controller There are questions about MC40SE, whether it is compatible with AR40B (Enhanced Autonomous Robot Control Board). It is not fully compatible if you want …
How does Stepper Motor Works – Part 1
By SC Lim RH2T Magazine Vol 2, Dec 2009 Stepper motors operate differently from normal DC motors, which rotate when voltage is applied to their terminals. An Overview Stepper motors were developed in the early 1960′s as a low cost alternative to position servo systems in the emerging computer …
XBee Series 2 Point to Point Communication
Introduction XBee is very easy and popular wireless device. It is a transceiver, it can transmit data wirelessly and it can also receive data wirelessly. There are several types of XBee module and it might get confusing. The very popular XBee is Series 1 (802.15.4), comes with the firmware to create connection of point …
Loading Program to Arduino Pro Mini
Arduino Pro Mini is a compact but powerful Arduino board. Being design with the idea to minimize the cost, the on-board USB to UART chip is taken out. leaving the board with pure ATmega microcontroller, voltage regulator and reset button. Yes, is low cost compare to the typical Arduino Duemilanove or UNO. …