Surya Yantra is for the appeasement of the planet Sun. The Sun stands for power and authority. When one is deprived of happiness through termination of service, suspension or through opponents or disease etc., worship of the sun is always advised. If the horoscope indicates that the Sun is weak being debilitated, in a dusthana (6th , 8th or 12th houses from the ascendant) or afflicted by association with malefic planets, using the Surya Yantra enhances peace of mind, get favour from superiors, officers and the government or minimize trouble from government. Enemies are suppressed and the malefic effects of the Sun are eliminated. Cardio vascular functioning is also positively benefited. It should be installed on a Sunday before 11 am.
Chandra Yantra is for the appeasement of the planet Moon. When moon is malefic in the horoscope, Chandra Yantra is worshipped to negate its malefic effects. The Moon is the natural significator of the mind. For those with a depressed mind and pessimistic thought waves and where one needs more love from the mother, this yantra is helpful. Good for respiratory and menstrual imbalances. It blesses the native with respect, friendship and creates contact with the opposite in a harmonious manner. The Chandra Yantra should be installed on any Monday when the Moon is in a waxing and kept underneath an image or photograph of Lord Shiva.
Mangal Yantra is for the appeasement of the planet Mars.It accumulates and radiates positive energy, and is employed for good fortune and success. People who have difficulty in finding a life partner, or whose married life is full of misery or those with Kuja DOSHAM (known as MANGLIK in NORTH India) should worship the Mangal Yantra to ward of the above evils. It provides protection from debts, accidents and enables speedy recovery from operation. It should be installed on a Tuesday morning before 11 am or around sunset time (about 6 pm).
Guru Yantra is for the appeasement of the planet Jupiter or Brihaspati. Jupiter stands for wisdom, academics, progeny and wealth. A weak Jupiter can affect these very important areas of life. When Jupiter is thus weakened in a horoscope, the use of this yantra is very benefic and favourable. Childless couples could become proud parents . It should be kept on rising Moon or Thursday in your place of worship. It negates the malefic effects of the planet and bestows power, rank and authority. It is good for professional and business orientation.
Shukra Yantra is for the appeasement for the planet Venus. Venus signifies beauty and attraction. It bestows respect, love of spouse and peace of mind. Venus rules over residential buildings, luxury and glamour. When Venus is weak, the use of this Yantra can bestow one with a good house, a good wife, a good car, luxury and excitement; It should be installed on a Friday evening at sunset time (5pm to 7 pm).
Saturn or Shani Bhagawan has always been looked at with awe, inspiration and fear. He is the "KARMAKARAKA", one who bestows on us the fruits of our previous birth karmas. Shani Yantra is for the appeasement of the planet Saturn. It is used to propitiate an afflicted Shani and achieve Rajayoga through complete blessings of Shani. When Saturn is malefic in a horoscope, in transit or causes Sadesathi ("ELARATA SHANI" (known as SADE SAATHI in North India - the seven and a half evil year cycle of Saturn) the use of Shani Yantra is very beneficial. It is very useful when one feels depressed. It reduces the evils such as bankruptcy, litigation, penury, injustice, obstacles, delays and dangerous ailments. It indicates success in worldy affairs and in business. A person can attain any heights. It should be installed on any Saturday after sunset (around 7pm and before 9 pm) after chanting the mantra: SHAM SHANAISCHARAYAI 'NAMAH" 8 times facing NORTH. Those who cannot chant this mantram may chant the simpler mantram: "OM NAMAH SHIVAAYA" 28 times. While installing this, wear a black coloured shirt or T-shirt and before installing this have a bath. After installing this, throw away the shirt. Not to be installed by ladies.
Buddha Yantra is for the appeasement of the planet Mercury. Where Mercury is afflicted by Saturn, Mars, Rahu or Ketu or is debilitated, this is very helpful in strengthening Mercury. This Yantra protects one from enemies, increases and sharpens the memory, protects against speech and stammering problems, nervous weakness, impotency, alcoholism, etc., It also stands for intelligence and studies. It is especially favorable for pregnant women against abortion and for the safe delivery of the child. It eliminates the malefic effects of the planet. It should be installed on Wednesday evening only between 5 and 7 pm.
Rahu Yantra is for propitiating Rahu. When Rahu is in an unfavourable position in a horoscope, this could result in the native becoming a subject of treachery and getting deceived even by the closest of his kin, be deprived of children, suffer from skin allergies and infections and have bad dreams. This yantra kept in the house can negate the malefic effects of Rahu. It blesses the native with knowledge, deep understanding and respect and a high level of prosperity. It should be installed on a Saturday around midnight after bath (between 11pm and 12 midnight).