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Introduction to I2C protocol, reading and writing in 24LC memories

Very useful memories, typically used to store configuration data or to keep logs with sensor data.

External RAM memories in MCS51 architecture (8051/8052)

How to connect and use an external memory, using data and address multiplexing.

Usage of MAX232 for RS232-TTL level shifting

A simple circuit used in almost every circuit that needs a connection with a PC.

Using GPS modules with microcontrollers

How to get the position from a GPS module, by parsing the NMEA strings.

Using a cellphone or GSM/GPRS modem with a microcontroller

How to use a cellphone or modem to send and receive SMS and calls, using a microcontroller.

List of software commonly used in electronics

Analysis of some electronic programs I used or use daily.

LED Matrix, methods to control

How to control a LED matrix with a microcontroller.

Input/output port expansion

How to add more digital inputs or outputs to a microcontroller, using shift registers.

Alphanumeric LCDs based on HD44780

How to control an Alphanumeric LCD using a microcontroller. Includes commands and schematics.

Graphical LCDs based on KS0108

How to control a Graphic LCD with a resolution of 128x64 (or 192x64) based in KS0108, using a microcontroller and two 8 bit I/O ports.