the moving message will be display on the LCD which will be controlled through microcontroller and the message will be sent by computer using RS232. The circuit diagram of the moving message display is shown in this post and how the whole process is completed is discussed here. The Microcontroller in this software is programmed such that it contro
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ls the LCD through an interface. An eight-bit interface between in the LCD and Microcontroller is programmed to transfer the data to be written on the LCD display screen. A further three out pins of the Microcontroller are used to generate control signals for the LCD. The three control signals are generated in the same pattern as discussed in the timing diagram in the previous chapters. The project, when looked in totality, can be seen as composing of three components, namely LCD, Microcontroller and serial port. The three components have been discussed independently until now and to give a complete picture, it is necessary to link these components. The linking is not only logical but is also translated into hardware connections. The serial port is connected to the Microcontroller to provide the end user with the functionality of passing a desired string to LCD in run time. An interface between the serial port and the Microcontroller is required for the data transfer. A variable baud rate is generated by the Microcontroller to synchronize the data transfer between the two ends. The connectivity can be analyzed and understood by the hardware diagram at the end of the chapter. The Microcontroller connects with the LCD with an 8bit interface to for data transfer. Three further pins are required to generate enable, read/write and instruction / data signals for the LCD. These three form a small instruction set that allows...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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