Electronic Corner

Here we presents another application with the LIS2L02 accelerometer and a PIC16F877: an electron hourglass that changes its flow by turning the circuit upside down! The hourglass body is made up by 30 red leds, and the sand flow is represented by lighting leds. An accelerometer detect the direction of the gravity acceleration and set the direction the sand flow must be have. We also provide Eagle files and the C program.

You don't have time to buy a microphone for the PC? You can simply build it ! The time taken can be higher than buy one, but the satisfaction to say "I made this with my hands"..

General purpose transistors BC546, BC547 and BC548 are very popular and similar, here we explain the differences of these components.

Datasheets of the LCD module TM202AAA from Tianma are not popular; here we write some guidelines to understand how to use this module.

The TM202AAA LCD module

A little time before 1960 was developed a revoluctionary integrated circuit: the timer 555 or, how was named, the "time machine in an integrated circuit". It helped circuit developers and hobbysts to making their projects, because it appeared a cheap component, simple and secure.