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 -

  1. IC lm 324 ( 14pin)
  2. 1k - 3 pcs resistor
  3. 470k resistor
  4. 10k preset
  5. Diode IN4148 - 2 pcs
  6. BC548b transistor
  7. 470pf ceramic capacitor
  8. Veroboard or Breadboard
  9. wire
  10. 9v battery
                                                                  Transistor & IC pins


                                                 Circuit diagram of emf detector
The circuit on vero board



                                                        Project making video

Comments

Post a Comment

Popular posts from this blog

how to make 4x4x4 led cube using arduino

Image
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 wire vero board ( doted or line ) header male   L shaped cardboard & LED 64 piece defuse led any colour Total making process  described in this video Connection to arduino- Download Arduino code
Read more

Raspberry pi 3.5 inch LCD screen setup & install driver

Image
This tutorial for beginner raspberry pi user .It is very easy way to install driver for 3.5 inch touchscreen LCD. Before install driver You need A Raspberry pi 3B with raspbian OS because this Lcd screen works with only raspbian OS 1.First Download Txt file from here Save it to your raspberry pi desktop 2.Make sure you have internet connection on your Raspi 3.copy upper part of text from downloaded text file & paste it to terminal emulator Now driver will install & Lcd turn on but HDMI will turn off LCD & touch is working after automatic restart  4.To turn off Lcd & active HDMI ,copy lower part text from Downloaded text file paste it to terminal emulator .Now HDMI will active & Lcd turn off This is full details video for installation driver
Read more

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

Image
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 battery To use LED as indicator must use a resistor with LED For ignition switch you can use Mofet ignition switch Use good quality parts & wire If you do not have much knowledge about electronics , then take a professional help For details of new version electric bicycle click here
Read more