Khairumudin, M. (2015) SISTEM PENGONTROL LAMPU DAN KIPAS ANGIN DALAM RUANGAN DENGAN MENGGUNAKAN OPERATING SYSTEM ANDROID MEDIA BLUETOOTH (HARDWARE). Other thesis, Politeknik Negeri Sriwijaya.
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Text (DAFTAR PUSTAKA)
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Abstract
ULN 2803 is driver relay IC with characteristics has 7 input bit, maximum voltage 50 volt, and 500 mA electrical current. In this IC has darlington circuit consists of two transistor that assembled with special configuration to get double reinforcement, so it can produce large current gain. The working principle of this tool is there is some switch on android are controlled by user that will send data as a signal. The signal will be process by microcontroller that produce output as logic 1 or logic 0 as input for IC ULN 2803. When logic 0 there is no voltage and electrical current get in to base in circuit, so there is no current gain in darlington circuit. For condition of output have value 12 volt, it is direct supply for IC, but no current because the voltage get in to cathode as positive voltage, so relay in condition Normally Open (NO) or electrical load in off condition, because of no current flow through diode, so diode in reverse bias condition. In condition logic 1 microcontroller will produce voltage value 4,9 volt and current 3,5 x 10-6 mA. The current 3,5 x 10-6 mA will get in to base of transistor and will be strengthened 1000000 times by transistor. So it will produce strengthening the current 350 mA direct to collector of transistor and it will flow to anode at diode. Then it wiil be forwarded to coil at relay, so the relay in Normally Close condition or load in ON condition. At the output there is voltage 1,4 volt, because of there is a decrease in the voltage that get in to diode, so diode in forward bias condition. Keyword : ULN 2803, Android, Darlington Circuit, Microcontroller, Relay, Normally Open (NO), Normally Closed (NC), forward Bias , Reverse Bias.
| Item Type: | Thesis (Other) |
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| Uncontrolled Keywords: | ULN 2803, Android, Darlington Circuit, Microcontroller, Relay, Normally Open (NO), Normally Closed (NC), forward Bias , Reverse Bias. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Telecommunication Engineering > Undergraduate Theses |
| Depositing User: | Mrs Trisni Handayani |
| Date Deposited: | 15 Dec 2015 06:50 |
| Last Modified: | 15 Dec 2015 06:50 |
| URI: | http://eprints.polsri.ac.id/id/eprint/2051 |
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