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all about Ultrasonic sensor

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 Hi friends. here is the diagram :-  here is code :- ---------------------------------------------------- /*  * Distance measurement using HC SR04 ultrasonic sensor and i2c 16x2 lcd  * ER BROS LAB  */ #include <Wire.h> #include <LiquidCrystal_I2C.h> #define trigger 12 #define echo 13 LiquidCrystal_I2C lcd(0x27, 16, 2); float t = 0, distance = 0; void setup() {   lcd.begin();   lcd.backlight();   delay(100);   pinMode(trigger, OUTPUT);   pinMode(echo, INPUT);   lcd.print("Ultra sonic");   lcd.setCursor(0, 1);   lcd.print("Distance Meter");   delay(2000);   lcd.clear();   lcd.print("ER BROS LAB");   delay(2000); } void loop() {   lcd.clear();   digitalWrite(trigger, LOW);   delayMicroseconds(2);   digitalWrite(trigger, HIGH);   delayMicroseconds(10);   digitalWrite(trigger, LOW);   delayMicroseconds(2);   t = pulseIn(echo, HIGH);   distance = t * ...
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DIY USBASP / AVR programmer

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Hello guys You will find circuit diagram, firmware , and other necessary information the link, which is given below.   here is main link of this project : https://www.fischl.de/usbasp/ Here is the diagram for basic microcontroller circuit : THANK YOU
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GESTURE control with arduino

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 HELLO guys. what we need :- Arduino uno apds-9960 Breadboard  Jumper wires here is the connection :- here is the code link :- https://github.com/vivek-chauhan7/APDS9960 here is the library :-  https://github.com/sparkfun/APDS-9960_RGB_and_Gesture_Sensor
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seven segment display with arduino

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Hi ---------------------------------------------------------  here is the circuit diagram ---------------------------------------------------------- HERE is the code for without library -------------------------------------------------------------------------------------- /*  * ER BROS LAB  */ #define a 6 #define b 7 #define c 8 #define d 9 #define e 10 #define f 11 #define g 12 #define dp 13 void setup() {   pinMode(a, OUTPUT);   pinMode(b, OUTPUT);   pinMode(c, OUTPUT);   pinMode(d, OUTPUT);   pinMode(e, OUTPUT);   pinMode(f, OUTPUT);   pinMode(g, OUTPUT);   pinMode(dp, OUTPUT); } void n0() {   digitalWrite(a,LOW);   digitalWrite(b,LOW);   digitalWrite(c,LOW);   digitalWrite(d,LOW);   digitalWrite(e,LOW);   digitalWrite(f,LOW);   digitalWrite(g,HIGH);   digitalWrite(dp,HIGH); } void n1() {   digitalWrite(...
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timer switch

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Hi here is the simple and very useful project. parts list ATMEGA8 (you can use atmrga328p, or any other arduino) - 1 22pf capacitor -2 16MHz crystal - 1 10K resistor - 1 100E resistors -8 push button - 1 rotary encoder with push button - 1 4 digit seven segment display - 1 relay- 1 bc547 transistor - 2 buzzer - 1 zero pcb - 1 10uf capacitor - 1 100nf capacitor - 1 some wires and male or female header pins here is the  schematic diagram here is the code link https://github.com/vivek-chauhan7/Timer-Switch YOUTUBE LINK https://www.youtube.com/channel/UCY6KA8oFk1s36fyPiFEmedQ
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PIR sensor with and without arduino

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Hello guys here you can see how interface PIR sensor with and without arduino board. use of this sensor is very easy , by connecting some wires as shown in diagram you can use this sensor. here is circuit diagram :- After connection as per diagram you need to upload this simple code :- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- #define pir 10 #define op 13 int val; void setup() {   pinMode(pir, INPUT);   pinMode(op, OUTPUT); } void loop() {   val = digitalRead(pir);   if(val == HIGH) {     digitalWrite(op, HIGH);   }   else {     digitalWrite(op, LOW);   } } -----------------------------------------------------------------------------------------------------------------------...
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Simple Home Automation

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Hi This is the simplest home automation using HC-05 Bluetooth module. parts you need...              components                                                                                  buy link Arduino Uno (any arduino works)                                 https://amzn.to/2MUYONt Bluetooth module                                                           https://amzn.to/2AyfN5t Relay module                                ...
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