Kelembaban udara pada greenhouse khususnya selada keriting merupakan hal yang penting. Hal ini penting karena menanam selada keriting dengan kelembaban kurang dapat menyebabkan kematian. Dengan adanya masalah ini diperlukan sistem kontrol kelembaban udara. Aplikasi dari fuzzy logic controller diharapkan untuk memecahkan masalah regulasi kelembaban udara pada greenhouse. Sensor yang digunakan adalah sensor DHT11. Fuzzy logic yang diterapkan memiliki 25 aturan, yang diperoleh dari 5 fungsi keanggotaan error dan 5 fungsi keanggotaan deltaerror. Penelitian ini menggunakan sistem inferensi fuzzy dengan metode mamdani untuk kontrol kelembaban udara dalam greenhouse. Pada aplikasi kontrol fuzzy untuk mencapai set-point kelembaban dari 60% ke kondisi 79%, diperoleh nilai parameter transient yaitu waktu tunak (ts) 570 detik, waktu naik (tr) 485 detik, waktu tunda (td) 60 detik, error steady state yaitu 0,7% dan tanpa overshoot. Pada aplikasi kontrol fuzzy untuk mencapai setpoint dari kelembaban udara 60% RH menjadi 79% RH membutuhkan 600 detik
The semiconductor technology for a certain function, such as instrumentation amplifier ICs is currently developing very fast, commercially available and can be obtained easily on the market. An instrumentation amplifier is a very important part in the process of data acquisition, especially for biopotential signals from the human body because its amplitude is very small and susceptible to noise interference. The selection of the proper amplifier instrumentation will produce an accurate biopotential signal reading. This paper explains the use of 2 types of instrumentation amplifiers, namely AD620 and ADAS1000, which are used in the design and realization of 12-channel ECG (Electrocardiograph). The performance and noise resistance of the two instrumentation amplifiers are compared and analyzed so that an appropriate instrumentation amplifier can be determined especially in the case of 12-channel ECG applications. 12-channel ECG was chosen because of the complexity of the design and can provide more detailed information as well as to detect the abnormalities heart’s functions. The results shows that 12-channel ECG using AD620 instrumentation amplifier has an SNR value below 12.04 dB, while using the ADAS1000 instrumentation amplifier has an SNR value below 35.5 dB and it is more resistant to noise interference.
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