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Sapto Aji, Wahyu
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Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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AD9850 based function generator Yusuf Fernades, Rudi; Sapto Aji, Wahyu
Signal and Image Processing Letters Vol 1, No 3 (2019)
Publisher : Association for Scientific Computing Electrical and Engineering (ASCEE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/simple.v1i3.18

Abstract

Function generator consists of the main generator and a modulation generator. The main generator provides sine, square, or triangular wave output with a frequency range of 0.01Hz to 13MHz. The modulation generator generates sine, square, and triangle waveforms with a frequency range of 0.01Hz to 10kHz. The input signal generator can be used as Amplitude Modulation (AM) or Frequency Modulation (FM). The AM envelope can be adjusted from 0% to 100%, while the carrier frequency of FM can be set up to± 5%. Function generator generally produces frequencies in the range of 0.5Hz to 20MHz or more depending on the manufacturer's design. The resulting frequency can be selected by rotating the frequency range knob. The amplitude signal can be adjusted within a range from 0.1V to 20Vpp (peak-to-peak voltage) at no-load conditions and 0.1V to 10Vpp with a load of 50ohms. The main output is specified by SYNC Output. This research makes a wave generator and its frequency, as well as DDS AD9850 as a wave reader sensor on the oscilloscope using Arduino Uno to generate waves and a rotary encoder as a frequency regulator. Based on the experiment by varying frequency, peak-to-peak voltage and period are produced as follows: if the frequency at 50Hz, then the peak-to-peak voltage is 1.2Vpp and period (T) is 0.006s if the frequency at 100Hz, then the peak-to-peak voltage is 1.2Vpp and period is 0.005s if the frequency at 150Hz then the peak-to-peak voltage is 1.2Vpp and period is 0.034s if the frequency at 1KHz then the peak-to-peak voltage is 1.2Vpp and period is 0.0006s if the frequency at 1.5KHz then the peak-to-peak voltage is 1.2Vpp and period is 0.0004s, and finally if the frequency at 2KHz then 1.2Vpp and period are 0.000225s.
Design and Build a Rugby Ball Thrower in the Kontes Robot ABU Indonesia 2020 Using Pneumatic Imran, Ali; Sapto Aji, Wahyu
Signal and Image Processing Letters Vol 3, No 1 (2021)
Publisher : Association for Scientific Computing Electrical and Engineering (ASCEE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/simple.v3i1.40

Abstract

The Kontes Robot ABU Indonesia (KRAI) is a robot contest held by the Directorate General of Higher Education (DIRJEN DIKTI). The winner of the national robot contest then represented Indonesia at the ABU (Asia–Pacific Broadcasting Union) Robocon which in 2020 was held in Fiji. Robot competition consists of two kinds, namely manual robots and automatic robots. In the competition there is one session or section, namely throwing the rugby ball. In the rugby ball throwing session, it is expected that the ball can be thrown and right into the goal so that it gets a maximum point of 5 points. This study tested the throw using pneumatics with the aim of getting the throw to get 5 points. The parameter that must be achieved is mechanical optimization with the throw landing on target and into the goal so as to get maximum points. The KRAI 2020 robot thrower uses pneumatics. Wind pressure determines the strength of a rugby ball toss. In calculating the distance, the parabolic formula is used and the method used to retrieve data through trial and error is to experiment from two angles, namely 40, and 50 then take good data.
The Method of Taking the Blessing Ball for Manual Robots at the 2018 Indonesian Robot Contest Septian, Andi; Sapto Aji, Wahyu
Signal and Image Processing Letters Vol 2, No 2 (2020)
Publisher : Association for Scientific Computing Electrical and Engineering (ASCEE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/simple.v2i2.44

Abstract

KRAI (Indonesian Abu Robot Contest) is a robotics contest between Higher Education in Indonesia. Indonesian ash robot contest organized by the Directorate General of Higher Education (DIRJEN DIKTI). The winner of the KRAI will represent Indonesia in the ABU (Asia-Pacific Broadcasting Union) Robocon which is held annually with locations moving around within ABU member countries. KRAI 2018 made a blessing ball picking robot with a gripper. The parameter that must be achieved is that the optimization of the robot drive can take the blessing ball. The design of the blessing ball picking mechanic can use the servo gripper by determining the slope of the robot. The angle of inclination of the robot determines the taking of the ball. Based on the results of the study, the results were obtained by testing carried out taking test data with an angle of 20 ?-50 ?. The robot can pick up when 1 ball with that angle. Testing with an angle of 50 ?-80 ?. The robot can take 2 balls with that angle. Testing with an angle of 80 ?-110 ?. The robot can take 3 balls with that angle. With an angle of 110 ?-140 ?. The robot can take 2 balls. With a blade of 140 ?-170 ? the robot can take 1 ball. In the method of taking the ball in the 10 tests that have been carried out, there are experiments that are declared efficient to be able to take 3 balls with a 100% success percentage in an average time of 21 seconds. So it can be implied that the tester at the ball picking used an angle of 80 ?-110 ? more efficiently than the angle of 20 ?-80 ? and 110 ?-170 ?.
Co-Authors Ali Imran Septian, Andi Yusuf Fernades, Rudi