The Vishnu Yantra, which, I have shown in the image has to be prepared on Copper on any auspicious Tithi, festival, Nakshatra or Astrology Yoga.
|Most Beneficial Shri Vishnu Yantra|
It should be installed in the Puja-Place, Altar or any other Pure and Clean Place in the house on a Shukla Paksha Ekadashi [this is the 11th day of the Bright Half of the Hindu Lunar Fortnight}.
Then, the Yantra should be worshiped with Dhoop/Diya and Fresh Flowers and the Sadhak should chant the Vishnu Mantra given below for 1008 Mantra Chants, a Tulsi or Baijanti Counting Mala is best suited for this purpose.
ॐ विष्णवे नमः ||
Om Vishnave Namah ||
On the day of Krishna Paksha Ekadashi, the Sadhak should worship the Shri Vishnu Yantra and then offer a Prasad of Fruits to the Yantra.
Offering 11 Tulsi leaves daily to the Shri Vishnu Yantra is considered to be extremly beneficial and auspicious.