We investigate on TV remotes saba
RX and TX-365 Remote SABA
Introduction
Hi, I would describe this experience when I conducted last summer, going over with you, all the stages that I have then led to the creation of a decoder for the TV remote control signals. The original purpose of my task was to analyze the signals from the remote of my TV, to investigate the code and the type of modulation. As you see anything special, in fact, this work aims mainly to be a basic study for possible future developments and expansions. [read more →]
(Article visited: 5290)We learn to use the protocol HD44780
We use the protocol "HD44780"
Hi, I would describe this occasion the operation and the commands needed to properly drive a liquid crystal display. Now they are many around in shops and stalls at very attractive prices ranging from about five Euros and beyond for more sophisticated types. To be precise, we will analyze all the control codes to activate the display with two lines of sixteen characters each, working with logic "HD44780" Hitachi. Right now I want to clarify that when we speak of sixteen characters per line, we refer to the characters that you see, because in reality there are twenty-four other off-screen for a total of forty characters per line.
To better explain the ideas I shall make use also of a simple little program that I made in "visual basic", with which we can through the parallel port of a personal computer, send various control codes to the display and check the effects immediately. The electrical circuit used by me and that I propose, it only represents the connections between the parallel port of a PC and display, in fact, the demonstrations that we will do it, no extra components. For reasons of safety and protection of the circuits concerned it is advisable the use of a battery with a total voltage between 4 and 5 volts. In my case I used three AA batteries, for a total of about 4.5 volts.
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We learn to use the I2C protocol.
ALMOST ALL THE PROTOCOL I2C
Introduction
I think now will be a few people not to have heard at least once in the I2C protocol. Suppose further that all will know that this system allows the transfer of data between two or more electronic devices in a serial fashion, with just two wires and in both directions. This means that within a more or less complex circuitry, two or more devices can communicate with each other, moving large amounts of data with a complexity ardware greatly simplified. Generally in an electronic circuit thus conceived there is a "master" and the "slave". The first and always a microprocessor or microcontroller that has devolved the task of organizing and directing the data traffic or directed, or by the "slave". [Read more →]
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