who has devloped the yasti - yantra device which is used -

yasti yantra   Dan yasti yantra

yasti-yantra These tools allowed for precise measurements of celestial positions and the tracking of stars

Astronomical Instruments Ancient Astronomical Instruments Chakra Yantra Dhanu Yantra Yasti means a stick Yasti Yantra was developed by Bhaskaracharya and has also been refered to as Dhi Yantra The same type of instrument has

ডিয়ার লটারি বাম্পার Yasti is just a long stick having standard yantra invented by bhaskara, dhruvabhama yantra of padhmanabha and many more instruments  yantra, Chakra, Chaap, Turiya, and Phalak yantra Out of these Bhāskara II used a measuring device known as Yasti-yantra This