Bluetooth auto connect in MIT App

 Bluetooth auto connect MIT App Inventor

By adding Bluetooth MAC address in the MIT App , it will connect automatically to the desire module

Arduino Solar battery charger with Bluetooth interface

 

Arduino Solar battery charger with Bluetooth interface

PIM-2 Pulse detector

 

PIM-2 Pulse Detector with no Counter

Below is the complete detail of PIM -2 detector:

• PIM_2_INFORMATION SECTION TV (mediafire.com)
• PIM2_no_counter V05 INFORMATION SECTION (mediafire.com)

Check Video here:  PIM 2 Metal Detector (youtube.com)

PIM 2 Range Testing:

Click Here:  PIM 2 Detector Range Test scale (inches)

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Sprint PI 4 Pro A

 

Sprint PI 4 Pro A simple Pulse Detector,

 

here i used Arduino pro mini instead of Nano both are working well,

 

instead of BF245 Transistor MPF102 can be used  

 

LRL Long range locator

          A simple Arduino Based LRL (Long Range Locator)

Capacitive Fingerprint R503 Reading Problem Resolved

Using Capacitive Sensor with existing available projects with common Adafruit_Fingerprint.h library 

in most cases it will not work , for  solution of said issue we have to make some changes in the existing Adafruit library .

Search the below file in the "h "and update it

0x1B to 0x04

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

from:

#define FINGERPRINT_HISPEEDSEARCH 0x1B

to :

#define FINGERPRINT_HISPEEDSEARCH 0x04