Internet Of Things Blog

Automatic Water Level Control And Real Time Monitoring Description This project will control the water level and keep the level between two predefined upper and lower positions. Any sensors can be used for this project, condition is only that it should give an active low output when activated by water. Sensors are simply water activated switches which is connected to ground. I personally prefer read switch-magnet arrangement. Read switches are fixed on water tank wall at desired positions, and magnet is fixed on a thermocol sheet which floats in water. Modify this idea by experimenting, for an accurate result. The designing of sensor arrangement is shown above. Sensors are read switches connected between PORT pins and ground. There is a magnet fixed on a thermocol which floats on water. Thermocol is free to move up and down through the string with the water level. When the thermocol reaches predefined water-levels the magnet and read switch come in con...

Click Here For Character LCD Basics   Lcd Library The mikroC PRO for 8051 provides a library for communication with Lcds (with HD44780 compliant controllers) through the 4-bit interface. An example of Lcd connections is given on the schematic at the bottom of this page. For creating a set of custom Lcd characters use Lcd Custom Character Tool. External dependencies of Lcd Library The following variables must be defined in all projects using Lcd Library : Description : Example : extern sfr sbit LCD_RS: Register Select line. sbit LCD_RS at P2_0_bit; extern sfr sbit LCD_EN: Enable line. sbit LCD_EN at P2_1_bit; extern sfr sbit LCD_D7; Data 7 line. sbit LCD_D7 at P2_5_bit; extern sfr sbit LCD_D6; Data 6 line. sbit LCD_D6 at P2_4_bit; extern sfr sbit LCD_D5; Data 5 line. sbit LCD_D5 at P2_3_bit; extern sfr sbit LCD_D4; Data 4 line. sbit LCD_D4 at P2_2_bi...

First, a quick history of RS232. What is RS232? It's just a name for a standard that has propagated from generation to generation of computers. The first computers had serial ports that used RS232, and even current computers have serial ports (or at least USB ports that act like RS232 ports). Back in the day, serial information needed to be passed from devices like printers, joysticks, scanners, etc to the computer. The simplest way to do this was to pass a series of 1s and 0s to the computer. Both the computer and the device agreed on a speed of information - 'bits per second'. A computer would pass image data to a printer at 9600 bits per second and the printer would listen for this stream of 1s and 0s expecting a new bit every 1/9600 = 104us (104 micro-seconds, 0.000104 seconds). As long as the computer output bits at the pre-determined speed, the printer could listen. Zoom forward to today. Electronics have changed a bit. Before they were relatively high power, high ...