This post’s subject is the LCD Keypad module, which allows to control a LCD display with buttons without wires and a protoboard.
The two shown projects to make LED effect using the Johnson counter 4017.
In this post, it’s shown how to control an Arduino with a smartphone using an easy method, through a Bluetooth module HC-05 or HC-06.
The common base is little known configuration for amplifiers using BJT. This type is used in high frequencies.
In this post, it is shown another type of amplifier configuration using BJT. This time, it is the common collector or emitter follower.
In this post, it is shown how to design a BJT amplifier with voltage divider on common emitter mode. Two examples of projects are presented.
In this post are shown 2 digital electronics projects, using DIP integrated circuits: luminous effect with 74HC595 and a semaphore.
This is the post’s second edition. Additional information has been added.
The MPU6050 module is an accelerometer and gyroscope with 6 axis degrees of freedom. In this post, are shown the operation and a project example.
In this post, are shown 2 circuit projects: an AC voltage detector and a cooler with LED effect.