Automatic temperature controlled fan

Here is a circuit to control a fan according to the  temperature of environment. If the  temperature is high, then the fan will automatically turn on and if the temperature is low then the fan will automatically turn off.
The circuit uses following components
1. 9/12 volt power supply
2. LM741 op-amp
3. BC 547 transistor
4. 6.8 k resistor , 10 k resisotor
5. diode
6. fan or motor

jyoti nepal educational campaign training arduino to school students

Technical education is the most important thing that is to be implemented to our school level students in Nepal. Every country in this world are developed by implementing technical education system about computer and electronics education. This will make students innovative and curious about the technology and they start to think and make some projects that will help them to make Nepal developed country. The today's young, skillful and energetic people should think about that and all this type of people should start what and how they can serve the country and to themselves.

Clap sensitive switch using Arduino((basic version)

The circuit diagram of the circuit is shown in the diagram below.

The code of clap sensitive circuit is shown below. the mic and a 47 k resistor are connected in series making voltage divider and the divided voltage is sent to the analog input pin A0 of the arduino. the led is joined in pin 12 of digital i/o line of arduino. to make it work open the serial monitor and check the value without clapping and with clapping and eg if the value show is 30 without clapping and 500 with clapping then write val > 50 in if else statement. the working video of the circuit is at youtube . click the following link https://www.youtube.com/watch?v=oi7IaTbd9Gs

int clapsense=A0;
int led=12;
int state=LOW;

Jyoti Nepal Educational Campaign at governmental school

click the name of the school  below to view the educational activity
under jyoti nepal
mahalaxmi lower secondary school

and Choina Bina Guru Ganesh primary school\
for more info click here

CERT brief activity

The video was made by one of the active CERT member mr. Sunil Thapa and was presented at the program known as "An engineering exhibition and Basic electronics workshop" at Cosmos College of Management and technology. There were Chairman as a chief guest and HOD , academic HOD, departments lecturers at that program. The video was about brief information what CERT did. n n the link of the video is in       www.youtube.com/watch?v=YFJqaNYI5i0    thanks thanks for visit. we want to do something to others to make everyone life's easier and to make Nepal a developed country by providing technical education to all the students and launching the electronics product in Nepal.

APPLE CO-FOUNDER GREAT STEVE JOBS' INSPIRING STATEMENTS.

Steve Jobs statement from the film Steve Jobs

steve jobs was the co founder of world's most top brand named as APPLE whose all products are famous like iphone, macbook, ipad, ipod, apple watch etc. I am really great fan of him. So i posted this statement here.

"when we grow up, you tend to get told the world is the way that it is your life is just to live your life inside the world and try not ot bash into the walls too much. but thats a very limited life. life can be much broader, once you discover one simple fact. and that is that everything around you that you call life was made up by people that are no smarter than you. and you can change it. you can influence it. you can build your own things, that other people can use. its to shake off this erroneous notion that life is just there, and you are just gonna live in it, versus embrace it. change it . improve it. make your mark upon it. and once you learn that, you ll never be the same again."

computer controlled rgb led with arduino uno R3

Arduino is an open source micro-controller board designed for technical as well as non technical user. School level students to the engineering students and other non technical persons and hobbyists are taking the advantage from the Arduino microcontroller. The today's educational system can be improved by this device and this is fun too. I have posted some simple tutorial about arduino microcontroller with simple projects but today i am going to post a little bit difficult project here. This projects utilizes the serial communication between arduino and computer and the arduino output
 can be controlled by computer. Lets explain slowly.