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how to make Obstacle avoiding robot at home

Arduino automatic robot Needed Arduino UNO Mini breadboard L298 motor driver module 2x dc motors with wheels HC-SR04 ultrasonic sensor Micro servo motor Button Red LED 220 Ohm resistor 9V battery holder (with or without power jack) 8 spacers (male-female) 8 nuts and 8 screws Make this circuit perfectly Get the code of your arduino from here  // Obstacle Avoiding robot // Praveen Sridhar // psbots.blogspot.com const int left = 1 ,mid = 2 ,right = 3 ; const int i1 = 8 ,i2 = 10 ,ea = 9 ,i3 = 5 ,i4 = 7 ,eb = 6 ; const int cthres = 600 ,rthres = 600 ,lthres = 600 ; int s1 = 0 ; int s2 = 0 ; int s3 = 0 ; int r; void setup () {    Serial . begin( 9600 );   pinMode(i1, OUTPUT );   pinMode(i2, OUTPUT );   pinMode(ea, OUTPUT );   pinMode( 13 , OUTPUT );   pinMode(i4, OUTPUT );   pinMode(eb, OUTPUT ); } void updateS() {  ...

Arduino and ultrasonic sensor measurement circuit with coding

Arduino project Needed Arduino UNO R3 =1 HC-SR04 Ultrasonic Sensor =1 Red LED =1 Green LED =1 560 ohm Resistors =2 Half Breadboard =1 Eight (8) Male/Male hookup wires =1 Connecting method Pin configurations HC-SR04 Ping distance sensor] VCC to arduino 5v GND to arduino GND Echo to Arduino pin 13 Trig to Arduino pin 12 Red POS to Arduino pin 11 Green POS to Arduino pin 10 560 ohm resistor to both LED NEG and GRD power rail Copy this below code and upload in your arduino #define trigPin 13 #define echoPin 12 #define led 11 #define led2 10 void setup() {   Serial.begin (9600);   pinMode(trigPin, OUTPUT);   pinMode(echoPin, INPUT);   pinMode(led, OUTPUT);   pinMode(led2, OUTPUT); } void loop() {   long duration, distance;   digitalWrite(trigPin, LOW);  // Added this line   delayMicroseconds(2); // Added this line   digitalWrite(trigPin, HIGH); //  delayMic...

How to get 5 voltage using lemon

5v lemon circuit Needed Lemon LT1111cs8-5 ic CD54-220M 22uH MBRS120T3 diode 33uf capasitor 10uf capasitor Copper Zinc Follow the picture and do the same Try this because this is workout for me. You must get 100ma of electricity Discription of lt1111cs8   The LT1111 is a versatile micropower DC/DC converter.The device requires only three external components to  deliver a fixed output of 5V or 12V. Supply voltage ranges from 2V to 12V in step-up mode and to 30V in step-down mode. The LT1111 functions equally well in step-up, step down, or inverting applications. The LT1111 oscillator is set at 72kHz, optimizing the device to work with off-the-shelf surface mount inductors. The device can deliver 5V at 100mA from a 3V input in step-up mode or 5V at 200mA from a 12V input in stepdown mode. Switch current limit can be programmed with a single resistor. An auxiliary open-collector gain block can be configured as a low-b...

How to charge a phone using potato

Potato charger Needed Potato Copper stick Zinc stick 680k resistor 909*k resistot 41k resistor 100uf capasitor 1N5818 transistor LT1073 L1 82mewF Now follow the picture *NOTE=this is 100% working but slowly working try it on your home. Discription of LT1073 The LT1073 is a versatile micropower DC/DC converter. The device requires only three external components to deliver a fixed output of 5V or 12V. The very low minimum supply voltage of 1V allows the use of the LT1073 in applications  where the primary power source is a single cell. An onchip auxiliary gain block can function as a low-battery detector or linear post-regulator.Average current drain of the LT1073-5 used as shown in the Typical Application circuit below is just 135µA unloaded, making it ideal for applications where long battery life is important. The circuit shown can deliver 5V at 40mA from  an input as low as 1.25V and 5V at 10mA from a 1V input.The device ca...

how to make a LDR motor car at home

LDR motor car Needed Robotic motor 4 with wheels 3V battery CL100 transistor 10K resistor 470 ohm resistor BC557B transistor LDR Card board Glue The basic circuit is below do the circuit and do the below car The car working method T2=LDR2 and T1=LDR1--Forward T2=Off and T1=LDR1--Left T1=Off and T2=LDR2--Right Continue T2=LDR2 Right rotation Continue T1=LDR1 Left rotation BC557B Transistor Silicom material of transistor PNP Polarity 0.5W maximum collector power dissipation 50v maximum collector base voltage 45v maximum collector emitter voltage 5v maximum emitter base voltage 0.1A maximum collector current 150c maximum operating junction temp 9pf collector capasitance 200 min forward current transfer ratio CL100 Transistor si material npn 0.6w MCPD 60V MCEV 50V MCEV 1V MEBV 1A MCC  

tesla coil

Make a simple Tesla coil Needed 2N2222 transistor 22k resister Switch 9V battery Copper wires (0.5mm) Copper wires (1mm) Follow the steps below Do this circuit and switch the circuit and then get a CFL bulb near the coil now the bulb was switched. 2N2222 transistor details Silicon material transistor NPN polarity 0.5w maximum collector power dissipation 60v maximum collector base voltage 30v maximum collector emitter voltage 5v maximum emitter base voltage 0.8A maximum collector current 175c maximum operating junction temparature 250mhz transition frequncy 8pf collector capasitance 100 minimum forward current transfer ratio

converted circuit

220v to 6.2v circuit diagram Needed 470k resistor 474k 400v capasitor 1N4007 diodes×4 1000uf 50v capasitor 100/1w resistor zaner diode 6.2v 1k resistor led Circuit diagram Zener diode 6.2v/5w This is a complete series of 5watt zener diode voltage regulators with tight limits and better operating characteristics that reflect the superior capabilities of silicon oxidd passivated junction. all this is in an axial lead. upto 180 watt surge rating 8.3ms maximum limits guaranteed on seven electrical parameters case-void free transfer molded, thermo setting plastic finish-all external surfaces are corrosion resistant and leads are readily solderable polarity-cathode indecated by colour band. when operated in zener mode, cathode will be positive with respect to anode any mounting position