Circuit Splash

In this arduino based project, we are going to control DC fan speed according to the room temperature and show these parameter changes on a 16x2 LCD display. It is accomplished by the data communications between Arduino, LCD, DHT11 sensor Module and DC fan that is controlled by using PWM. PWM is a technique by using which we can control voltage.

Two HTML drop-down select boxes are used to select hour and minute values on a web page that are sent to an Arduino web server. The time values can be used to set a real-time clock or for any other time related settings.

Stepper motor is brushless DC motor, which can be rotated in small angles, these angles are called steps. Generally stepper motor use 200 steps to complete 360 degree rotation, means its rotate 1.8 degree per step. Stepper motor used in many devices which needs precise rotational movement like robots, antennas, hard drives etc.

Here is my project on counting the heart beats using an MSP430G2553, and a dual op amp ic, LM358, i think any other dual op amp can work in its place [to be sure, just check the pinouts before replacement.

The concepts of these mosquito repellers are simple and we can build a simple mosquito repellent circuit at home easily by using 555 timer IC and few other commonly available components. Let’s see the concept of mosquito repellent circuit in detail.