Digital Wireless Security System: 10 Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:30

Hauv Cov Lus Qhia, peb tab tom tsim ib qho qauv ntawm kev siv wireless kev nyab xeeb siv RF Technology.

Txoj haujlwm no tuaj yeem siv rau lub hom phiaj kev nyab xeeb hauv tsev, chaw haujlwm, koom haum thiab lwm yam Vim tias nws tau tsim nrog RF Technology thiab nws tau ruaj ntseg nws pheej yig tshaj thiab txhim khu kev qha rau lub hom phiaj me hauv kev lag luam.

Paub meej txog cov haujlwm:

Nws tuaj yeem muaj thaj tsam ntawm 100-150 meters tab sis nws qhov ntau tuaj yeem nce ntxiv nrog qhov ntev hauv cov kav hlau txais xov. Nws tau tsim nrog cov keyboard 4*4 cuam tshuam nrog PIC 16F887 microcontroller thiab LCD.

Cov ntaub ntawv uas tau xa los ntawm cov keyboard tau tso rau hauv LCD 16*2. Thaum tus lej nkag nkag nkag nws tshawb xyuas tus password uas khaws hauv EEPROM nco ntawm microcontroller.

Thaum tus password raug, nws xa lub teeb liab wirelessly nrog kev pab ntawm RF cov qauv thiab nws tuaj yeem tswj txhua yam nrog kev pab tswj kev sib tw.

Kauj Ruam 1: Kev Xaiv Cheeb Tsam thiab Cov Khoom Siv Hluav Taws Xob

Cov cheebtsam tau raug xaiv los ua qhov haujlwm yog:

1. PIC 16F887 microcontroller 8-ntsis.

2. LCD 16*2

3. Khawm (16)

4. RF modules 434 MHZ

5. HT12E thiab HT12D (Encodes thiab decodes)

6. L293D

7. Power Supply Cheebtsam:

7.1. LM7805 (Cov ntsuas hluav taws xob tawm)

7.1.2 capacitors (330uf, 0.1uf)

7.1.3 Hloov pauv yooj yim

7.1.4 1N4007 Diode

8. Potentiometer

9. PIC cov khoom siv 2 (lub hom phiaj kev ua haujlwm).

10. Crystal oscillator (22 MHz)

11. Poj niam thiab txiv neej txuas.

Kauj Ruam 2: Muab Lub Hwj Huam Rau Cov Hluav Taws Xob

Peb tsim cov khoom siv hluav taws xob txhawm rau muab 5V rau txhua qhov khoom siv hluav taws xob zoo li IC uas peb tab tom siv, microcontroller, keypad logic thiab LCD 16*2.

Peb tsim cov kev tswj hwm hluav taws xob yooj yim los ntawm kev txiav txim siab cov kab hluav taws xob tawm ncaj qha LM7805.

Lub tshuab hluav taws xob tau siv los nqis qis qhov hluav taws xob thiab tus choj txuas hluav taws xob hloov pauv qhov hloov pauv hloov pauv hloov pauv mus rau hauv pulsating dc. Lub lim hluav taws xob tau siv los lim tawm cov pa pulsating kom thiaj li tau txais dc yoj dawb ntawm qhov tso tawm. LM7805 tswj 5v tso tawm txawm tias muaj yog qhov hloov pauv ntawm qhov hloov pauv ntawm qhov hluav taws xob mus rau sab nkag mus rau qee yam.

Lub Circuit Court raug tsim thiab txheeb xyuas ntawm Proteus simulation software 7.7.

Kauj Ruam 3: Daim Duab Tshaj Tawm Circuit Court

Nov yog daim duab qhia chaw xa xov uas tsim los ntawm Proteus software 7.7.

Nws muaj cov keypad cuam tshuam nrog microcontroller PIC 16F887 thiab LCD 16*2 uas tau qhia tus lej nkag teb chaws uas tau ntaus nws.

Cov software no tuaj yeem siv los sim seb peb lub Circuit Court thiab cov lej ua haujlwm tau zoo lossis tsis.

Kauj Ruam 4: Paub Txog Cov Cheeb Tsam

Keypads

Keypads tau siv dav hauv kev siv tsheb nrog rau kev lag luam khoom noj.

Txoj Haujlwm Keypads tuaj yeem siv rau hauv qhov system tuaj kawm tsis tu ncua ntawm cov tsev kawm ntawv, chaw haujlwm thiab lwm yam, qhov uas koj nkag mus rau koj tus lej ID, uas tau tshwm sim thiab tib lub sijhawm khaws cia, los cim koj lub xub ntiag.

Cov qhov rooj tsis siv neeg feem ntau nkag mus nrog lub kaw lus tswj hwm lub kaw lus uas tshwj xeeb cov cai tau hu rau ntawm lub pob kom qhib lub qhov rooj.

Kauj Ruam 5: Ua kua Crystal Display

LCD (Liquid Crystal Display) screen yog lub tshuab hluav taws xob tso saib thiab pom ntau yam kev siv.

16x2 LCD zaub yog cov qauv yooj yim thiab feem ntau siv hauv ntau yam khoom siv thiab khoom siv hluav taws xob.

Cov qauv no tau nyiam dua xya ntu thiab lwm cov LEDs uas muaj ntau ntu.

Qhov laj thawj yog: LCDs yog kev lag luam; yooj yim programmable; tsis muaj kev txwv ntawm kev qhia tshwj xeeb & txawm tias (tsis zoo li hauv xya ntu), cov duab ua yeeb yaj kiab thiab lwm yam.

Kauj Ruam 6: Saib Nws Ua Haujlwm

Muaj cov encoder thiab decoder siv los hloov cov ntaub ntawv mus rau hauv ob qho tib si mus rau series lossis series mus rau qhov sib luag lossis hloov pauv.

Lawv ua haujlwm zoo li kev hloov pauv resistor nkaus xwb tab sis qhov sib txawv ntawm qhov chaw nyob tshwj xeeb.

Txhawm rau sib txuas lus nrog cov encoders thiab decoder raws li lawv tau xa cov ntaub ntawv wirelessly, peb yuav tsum xaiv qhov tseeb los ntawm kev xaiv qhov raug tiv thaiv los ntawm cov ntaub ntawv. Oscillator zaus yuav tsum sib xws.

RF modules tau siv los xa cov ntaub ntawv wirelessly ntawm 434 MHZ zaus. Lawv pheej yig heev thiab npaj tau yooj yim hauv khw uas tsis yog lwm yam thev naus laus zis.

Lub kav hlau txais xov ntev txiav txim siab tias kev sib txuas lus tuaj yeem tshwm sim ntev npaum li cas thiab ntawm cov zaus uas peb tuaj yeem xa tawm.

Zaus * wavelength = ceev ntawm lub teeb

Hmax = wavelength/4

zaus = (ceev ntawm lub teeb)/ (wavelength)

Hmax = (ceev ntawm lub teeb)/ (wavelength)/ 4

Kauj ruam 7:

"chaw thau khoom =" tub nkeeg"

Nov yog daim duab qhia chaw ntawm tus xa thiab tus txais uas ua tiav tag nrho txoj haujlwm.

Zoo siab kawm ….

Ua siab zoo los tawm tswv yim thiab nug kev ua xyem xyav