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হ-য-ব-র-ল....

A real friend

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By Mahamudul Karim Khondaker - April 08, 2013

A real friend is one who walks in when the rest of the world walks out

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Arduino to excel Communication

By Mahamudul Karim Khondaker - March 30, 2019

Arduino to excel Communication (Arduno code) : void setup(){ Serial.begin(9600); Serial.println("CLEARDATA"); Serial.println("LABEL,Acolumn,Bcolumn,..."); Serial.println("RESETTIMER"); } void loop(){ int sensorValue = analogRead(A0); Serial.print("DATA,TIME,TIMER,"); Serial.println(sensorValue); delay(1); }

Arduino and MQ 2 gas sensor

By Mahamudul Karim Khondaker - March 30, 2019

Gas Sensor MQ2 Arduino code : #define MQ_PIN (0) //define which analog input channel you are going to use #define RL_VALUE (5) //define the load resistance on the board, in kilo ohms #define RO_CLEAN_AIR_FACTOR (9.83) //RO_CLEAR_AIR_FACTOR=(Sensor resistance in clean air)/RO, //which is derived from the chart in datasheet / **********************Software Related Macros*********************************** / #define CALIBARAION_SAMPLE_TIMES (50) //define how many samples you are going to take in the calibration phase #define CALIBRATION_SAMPLE_INTERVAL (500) //define the time interal(in milisecond) between each samples in the //cablibration phase #define READ_SAMPLE_INTERVAL (50) //define how many samples you are going to take in normal operation #...

Kashmir | History, People, Conflict, Map, & Facts

By Mahamudul Karim Khondaker - February 11, 2023

Kashmir ( IPA: [kaʃmiːr] ) is the northernmost geographical region of the Indian subcontinent . Until the mid-19th century, the term "Kashmir" denoted only the Kashmir Valley between the Great Himalayas and the Pir Panjal Range . Today, the term encompasses a larger area that includes the Indian-administered territories of Jammu and Kashmir and Ladakh , the Pakistani-administered territories of Azad Kashmir and Gilgit-Baltistan , and the Chinese-administered territories of Aksai Chin and the Trans-Karakoram Tract . [1] [2] [3] In 1820 the Sikh Empire , under Ranjit Singh , annexed Kashmir. [4] In 1846, after the Sikh defeat in the First Anglo-Sikh War , and upon the purchase of the region from the British under the Treaty of Amritsar , the Raja of Jammu, Gulab Singh , became the new ruler of Kashmir. The rule of his descendants, und...