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How to make obstacle avoiding robot car with out microcontroller

It is simple robo car made with IR proximity sensor.

If IR sensor send signal to relay module then relay on and left motor stop ,robot turn left
Right motor connected to battery + & - so right motor always on

Parts list-
Bo gear motor 100 Rpm
IR proximity module
single channel relay module
plastic box
jumper wire
3 X AAA battery or 
4X rechargeable AAA battery
or LI -po battery 3.7V
wheel x2
castor wheel x1

please watch making video

Recent posts

How to make simple Arduino clap switch

In this post I will describe how to make easy clap switch using arduino

you can on/off light or fan by clap

You need to make it -

Arduino UNOSound sensor moduleSingle channel relay moduleSome male,female jumper wireSmall bread boardAc bulb or Fan Relay & sound sensor's
VCC will connect to Arduino 5 V GND will connect to Arduino GND
Soun sensor out pin connect to Arduino pin 6 Relay module's input Pin connect to Arduino pin7
Download code for arduino from here 

Watch making video of this project

Cell phone detector or EMF detector circuit

It is a very simple cellphone detector circuit designed using IC LM 324 op-amp

it can also detect EMF ( Electromagnetic Frequency )

Parts list -

IC lm 324 ( 14pin)1k - 3 pcs resistor470k resistor10k presetDiode IN4148 - 2 pcsBC548b transistor470pf ceramic capacitorVeroboard or Breadboardwire9v battery                                                                   Transistor & IC pins

                                                 Circuit diagram of emf detector
The circuit on vero board

                                                        Project making video

Connection & wiring of 24 v electric bi -cycle By Techno review 85

In this post I want to describe How to connect all parts like brushed motor,
throttle brake light, ignition switch via controller

It is very easy to wiring e bike parts

About Parts you need to make  & all details about electric bi - cycle Click here 

You have to use a motor controller ( in my bike I used 24 volt controller)

There are lots of wires coming out form the controller .we have to connect those wires to motor,battery,throttle,break ( optional) & ignition switch

It is full wiring diagram of ebike

Some important  Use 4mm wire to connect batteryTo use LED as indicator must use a resistor with LEDFor ignition switch you can use Mofet ignition switchUse good quality parts & wireIf you do not have much knowledge about electronics , then take a professional help

How to Make Electric Bike at Home

How to Make Electric Bike at Home ( Techno Review 85)
I make an electric bicycle with speedometer from brushed motor it can run 30 -25 km / charge & speed about 25km/h Lets start---
 Basic needs - 1 ) 24 v DC Geared motor (MY1016Z) 2) controller 24v 3) Throttle 24v 4) battery 12v X2 (14 amp) 5) Dual freewheel ( I make it own) 6) chain 7) wire 8) a bicycle etc---                                            24 v motor,controller & thortole 
Making videos on youtubepart 1 part 2 Full part Installing speedometer -
Making Dual Freewheel

I make dual freewheel from van rickshaw rear wheel hub.I cut some thread from it And joint two normal freewheels together
Fitting Motor & Battery

how to make 4x4x4 led cube using arduino

To make 4x4x4 led cube using arduino you need arduino uno or arduino nano 3.0

parts list -

Arduino uno or nano
Resistor 100 ohom x4
vero board ( doted or line )

header male   L shaped


& LED 64 piece defuse led any colour

Total making process  described in this video

Connection to arduino-

Download Arduino code

How to control light or fan using any IR remote (IC 4017)

using  this easy circuit you can use any IR remote like TV,DVD player to turn on & off

Parts List -

IC - CD 4017
IC - 7805 ( 5v regulator)

transistor - BC 548 B
                  BC 558

capacitor - 1000 mfd /16 v
                   100 mfd /16v


resistor - 330 ohom x2

IR sensor TSOP 1738 or TSOP 1838

Diode   -  1N4007

Realy 6v

vero board,wire,

Circuit Diagram --

Pin out of transistor ,IC, Relay & IR sensor

                                                     You tube video ---

Arduino password protected door lock system

It is a password protected door lock project using arduino
Press # for clear then press the password ( in my case it is 1234)
and press * (star) for confirm.
now servo motor on and door lock will open .after 5 sec it will automatically close.

Parts need-

arduino uno
4x4 Matrix  keyboard
servo motor
jumper wire
power bank or battery for power supply
bread board
normal door lock
resistor 220 ohms

Connection -

key pad pin            Arduino digital pin

      1             to              9  
      2             to              8
      3             to              7
      4             to              6
      5             to              5
      6             to              4
      7             to              3
       8            to              2

green led to arduino digital pin 11

red led to arduino digital pin 12

led ground via 220 ohom resistor

servo signal to arduino digital pin 13

                        Connection Diagram

Arduino code--

#include <Password.h> //http://pl…