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...

    Circuit Diagram An alarm clock is a clock that indicates a pre-set time by producing sound at that time. This functionality of digital clock is used to awaken people or remind them of something. A digital clock is one that displays time digitally. The project explained here, displays time on a 16x2 LCD module. The LCD is interfaced with 8051 microcontroller (AT89S51). This circuit can be used in cars, houses, offices etc. This clock works in 12 hour mode and is configured by programming the microcontroller AT89S51. The program uses a delay function for producing a delay of 1 second. The connections in the circuit are as following: port P2 of microcontroller is used as data input port which is connected to data pins (7-14) of LCD. P3^0, P3^1 and P3^6 pins of microcontroller are connected to control pins RS, RW and EN of LCD. P1^0, P1^1, P1^2 and P1^3 pins of microcontroller are connected to tactile switches to take manual inputs. On reset, the LCD prompts the use...