Detail Laporan TA : NAUFAL FADHLU ROHMAN

NAUFAL FADHLU ROHMAN (2020) Alat Ukur Tingkat Kekeringan Gabah Menggunakan Jembatan Wheatstone Berbasis Arduino Uno Tugas Akhir, Teknik Pendingin & Tata Udara
Politeknik Negeri Indramayu.

Text LAPORAN BAB 1 ( Download )

In rice cultivation to produce the best quality rice, the grain must be dried in the sun or by using an artificial dryer. Grain that is too late to dry will reduce the quality of rice. This is because the water and humidity levels are too high. Therefore, a tool is needed that can measure the dryness of grain. This research will create an instrument to measure the dryness level of grain using the Wheatstone bridge principle. The Wheatstone bridge is a circuit that can simplify the resistance. This circuit contains 3 resistors of similar size, 1 potentiometer and a PVC pipe filled with grain which is given a cross section as a sensor. Connected to a voltage source from the function generator of 3.5 VAC then the two Vouts from the Wheatstone bridge circuit will be entered at port A0 and GND on Arduino as a microcontroller to process programs based on the exponential equation function made in matlab to display dryness on the LCD screen . For the results of the percentage difference between the drought measuring instrument using a Wheatstone bridge and a moisture meter, where dry grain is 12% of the drought measuring instrument with a Wheatstone bridge, while the moisture meter is 12.5% with the resulting output voltage of 1.02 V. For dry grain 14.6% in the drought device using a wheatstone bridge, while in the moisture meter it is 14.7% which produces an output voltage of 2.08 V. The dryness of the wettest grain is 29.2% in the drought device for wet grain with an output voltage of 1.83 V . Keywords: Grain, Rice, Wheatstone Bridge