Hr robotics

Circuit diagram for 12 volt battery charging indicator Required need 1. Female charging pin 2.1k resistance 3.diode 1n4007 4.12 volt 2ampere adapter 5.12 volt battery

Coding to program servo and ir sensor #include <Servo.h> const int analogInPin = A0;  int sensorValue = 0;                int servoPin = 9; int i = 0; Servo servo; void setup() {   servo.attach(servoPin); } void loop() {     sensorValue = analogRead(analogInPin);                if(sensorValue < 600){     for (int i = 0; i<=180; i++){     servo.write(i);     delay(10);    }   }   servo.write(i);                        }

Coding to program ir sensor and aurdino void setup () { pinMode ( 13 ,OUTPUT); pinMode ( 3 ,INPUT); Serial. begin ( 9600 ); } void loop () { if ( digitalRead ( 3 )== LOW) { digitalWrite ( 13 ,HIGH); delay ( 10 ); } else { digitalWrite ( 13 ,LOW); delay ( 10 ); } }

Circuit diagram for DC motor speed controller using BC 547 Material need 1.10 k resistance 2.9 volt battery 3. 10 k volume controller 4.dc motor 5.BC 547 transistor

Components used 1.12 volt battery 2.12 volt 3 ampere transformer 3.resistance 1k 4.Transistor 3055 5. Led bulb

Led voltage dimmer circuit Material need 1.BC 547 transistor 2.led bulb 3.10 k volume controller 4.9 volt battery 5.10 k resistance

Circuit diagram- material need 1.7805 ic 2. charging pin Mobile charger for buy https://amzn.to/2KgZax9

Circuit diagram for LPG protection Required material 1.LPG sensor-https://amzn.to/2UDk6Vd 2.relay-https://amzn.to/2uQBB5O 3.transistor 4.battery 5.buzzer 6.old mobile