Friday, June 24, 2011

Development board for PIC16F628A, PIC16F88, PIC16F1827, and PIC16F1847 microcontrollers

I recently made a second version of my old 18-pin PIC development board with much more peripheral chips.This board is best suitable for doing experiments with enhanced mid-range PIC microcontrollers, such as PIC16F1827 and PIC16F1847. The board has I/O port expander, external EEPROM, temperature sensor, Quad OpAmp, digital potentiometer chips, and many more features.

Sunday, May 29, 2011

Sensirion's SHT1x and SHT7x series of humidity sensors interfaced to PIC Microcontroller

Sensirion's SHT series of humidity sensors integrate sensor elements with all the required signal processing circuits on chip, and provide fully calibrated digital outputs for relative humidity and temperature measurements. This tutorial explains how you can interface a SHT1x/7x sensor to a PIC microcontroller to measure ambient temperature and relative humidity. The tutorial described in full detail about the sensors, their specifications and interface, and the implementation of communication protocol using mikroC compiler.

Wednesday, May 11, 2011

Fundamentals of LED dot matrix display

LED dot matrices are very popular means of displaying information as it allows both static and animated text and images. This tutorial describes the basic architecture of a LED dot matrix display and its interfacing with a microcontroller (PIC18F2550) to display static characters and special symbols.

Sunday, March 27, 2011

Multi-functional power supply with built-in voltage, current, and frequency meters

While prototyping your new project, you might want to know how much power your designed circuit will draw from the source voltage. One way to find it is to connect an ammeter in series with the circuit and determine the current drawn from the source. Then, knowing the source voltage you can easily determine the power. But doing this may not be always convenient. This project describes a special power supply unit that has built-in features for measuring the source voltage and current. Therefore, you can monitor both the parameters continuously while experimenting your circuit.

Sunday, February 20, 2011

555 timer could reduce number of pins in keypad interfacing

A 4x3 matrix keypad requires 7 I/O pins of microcontroller for interfacing. But you could reduce the required number of connections to two by using a 555 timer IC. If you want to know how, visit Embedded Lab's new post "2-Wire Keypad Interfacing using 555 Timer".

Microcontroller-based Embedded Systems Design