better estimation of distance.
then, we wanted to use this sensor to control a led light. we plugged the light on pin 13 and set the conditions that if the distance is lower than 100, the led will be on.
first, we prepared the soil by mixing it in with grass seeds. i designed my project so that each soil pocket would be larger in size than the one before it; essentially, it was a line of pouches that grew in size from one end to the other. i tightened the knots between each pouch with some rubber bands. we then moved our project to the farm room and gave it plenty 