Felezjoo Detector with no counter

 This is my new compact Felezjoo detector with 3.7Vdc battery backup charging from any mobile phone charger  including  C-Type. 

Some changes like i used 2N7000 instead FET BS170  and instead of BC337 i used 2N3904

Voltage buckup module used to stepup the voltages to 18Vdc, 1x1 coil used  

Arduino SIM800L IMEI CHANGER

Below mentioned code can change any GSM module IMEI 

Many of faulty registered IMEI can be re-use in this Case,

AT+SIMEI command will be used in this case

https://youtu.be/hOJCJVk-5JE

Another video for updating Nokia IMEI on sim800

https://youtu.be/In8d8y4rQqM

IMEI finding

delay(4000);

     SIM800L.println("AT+GSN");

      delay(1000);

----------------------------------------------------------------

#include <SoftwareSerial.h>

void setup() {

  Serial.begin(9600);

  delay(100);

  Serial.println ("AT+SIMEI=863789000008218"); } // Enter desire IMEI #

void loop() {}

Best Power supply for Sim800L module

https://obaidkakar.blogspot.com/2023/12/delta-pulse-2-metal-detector.html