Cov txheej txheem:

DIY Pocket Sized Anti-Theft Alarm!: 3 Kauj Ruam
DIY Pocket Sized Anti-Theft Alarm!: 3 Kauj Ruam

Video: DIY Pocket Sized Anti-Theft Alarm!: 3 Kauj Ruam

Video: DIY Pocket Sized Anti-Theft Alarm!: 3 Kauj Ruam
Video: How to make Laser Security (Theft) Alarm using SCR - 1 KM Range 2024, Kaum ib hlis
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DIY Pocket Sized Anti-Theft Alarm!
DIY Pocket Sized Anti-Theft Alarm!
DIY Pocket Sized Anti-Theft Alarm!
DIY Pocket Sized Anti-Theft Alarm!
DIY Pocket Sized Anti-Theft Alarm!
DIY Pocket Sized Anti-Theft Alarm!
DIY Pocket Sized Anti-Theft Alarm!
DIY Pocket Sized Anti-Theft Alarm!

Puas muaj leej twg rub koj cov khoom thiab koj tsis pom leej twg yog leej twg? hauv cov lus qhia no kuv yuav qhia koj yuav ua li cas ua lub tswb ceeb toom nkag mus rau lub tswb uas hnyav thiab nqa tau yooj yim. Qhov haujlwm cuam tshuam nrog 2 ntu - tus xa thiab tus txais. lub hom phiaj kom tiv thaiv tau muab tso rau nruab nrab ntawm Tus Kws Tshaj Lij thiab tus txais. Thaum cov khoom raug tshem tawm tso cai tso lub teeb liab los ntawm tus xa mus rau tus neeg txais thiab ua lub tswb nrov. Qhov hluav taws xob hnyav thiab nqa tau yooj yim. raws li nws siv cov khoom siv tsawg heev. Qhov haujlwm no yuav tsum yooj yim rau koj nyob ntawm koj lub tsev tsim hluav taws xob thiab kev txawj ntse. Tsis tas li kuv kuj tsis tau muab daim duab ntawm lub tshuab xa mus.. Thanks rau J osehf Murchison rau kev pab kuv daws teeb meem kuv qhov teeb meem hauv Circuit Court. Muaj cov vis dis aus hauv qab no kom pom cov kev ua haujlwm hauv Circuit Court. Kuv tau nkag rau qhov no rau Pocket Sized Electronics Contest yog li yog tias koj xav tias kuv cov lus qhia yog qhov zoo, Pov npav rau kuv.

Kauj Ruam 1: Cheeb Tsam:

Cheebtsam
Cheebtsam

ICs -LM741 lub hom phiaj dav dav opamp x1 Resistors -680k x2 -1M x1 -27k x1 Transistors 2N2907 PNP transistor x1 piezo buzzer x1 (qhov no yuav tsum yog me me) IR photodiode x1 IR coj x1 Cov hauv qab no tsuas yog yog tias koj tab tom siv, pcb board (me me) x2 soldering lead Dil socket x1 -Cov duab no yog rau sawv cev lub hom phiaj nkaus xwb

Kauj Ruam 2: Tsim Vaj Tsev! (Siv Schematic)

Tsim lub Circuit! (Siv Schematic)
Tsim lub Circuit! (Siv Schematic)

Muaj qhov feem ntau yog 2 ntu rau hauv Circuit-tus txais thiab tus xa kuv yuav qhia koj yuav ua li cas thiaj ua tau raws tus lej. -lub xub ntxig lub qhov ntsaws ntsaws rau hauv pcb pawg thawj coj los yog daim ntawv qhia zaub mov (yog tias koj xav ua tus qauv nws) -tom qab ntawd ntxig LM741 opamp rau hauv qhov ntsaws ntsaws ntsaws -txuas tus pin4 rau V- -txuas tus pin7 rau V+ -txuas 680k resistor ntawm V+ thiab tus pin 2 -txuas 680k resistor ntawm V+ thiab tus pin 3 -Connect tus 1M resistor ntawm V- thiab tus pin 2 -txuas txuas luv kawg (cathode) ntawm photodiode rau V- thiab ntev dua lead (anode) rau tus pin 3 -txuas 27k resistor nruab nrab ntawm tus pin 6 thiab lub hauv paus ntawm transistor. -connect tus emitter ntawm transistor rau V+ -connect tus collector ntawm transistor mus rau cathode ntawm piezo buzzer -connect anode ntawm piezo buzzer rau V+ ---------------- --------------- Thiab tus txais tau ua tiav. Tsim lub tshuab xa tawm tau yooj yim dua (kuv tau siv 9Vbattery tab sis koj tuaj yeem siv 3v npib cell roj teeb lossis 2x1.5v aa lossis aaa cells kom nws me dua thiab nqa tau) -yog tias koj yuav siv 9v roj teeb ces -txuas nrog 47 ohm resistor ntawm qhov zoo ntawm lub roj teeb thiab anode ntawm IR coj thiab txuas qhov tsis zoo ntawm lub roj teeb mus rau cathode ntawm IR coj yog tias koj siv 2x1.5v hlwb ua raws tib yam tab sis yog tias koj xav tau koj tuaj yeem tshem tawm resistor -------------------------------------- Lub transmitter tau ua tiav Thaum koj qhib ob lub voj voog xyuas kom tseeb tias muaj ib qho khoom nyob nruab nrab ntawm tus xa thiab tus txais lossis lwm yam lub tswb nrov yuav tawm suab. Koj teeb tsa cov kab hluav taws xob sib luag ib leeg ib yam li kuv tau ua hauv video.

Kauj Ruam 3: Cov Lus Qhia, Cov Cuab Yeej Ceev faj thiab Qhov Chaw Ua Yeeb Yam

Cov lus qhia thiab cov lus qhia los ntawm kev nce qib ntawm IR coj (koj tuaj yeem pom cov txiaj ntsig siab IR coj hauv kev qhia tawm) koj tuaj yeem tiv thaiv cov khoom loj xws li khoos phis tawj thiab tej zaum txawm tias koj lub thawv noj su !!!!! lawv puas yog?) yog tias koj xav ua kom nws pom tsawg dua koj tuaj yeem zais nws hauv cov ntawv me me lossis lub thawv me Kev ceev faj thiab cov peev txheej ntawm qhov ua yuam kev: Nco ntsoov tias koj tso tus xa tawm thiab tus txais sib luag ua ke nrog IR coj taw tes rau lub photodiode thiab tso ib qho khoom nruab nrab ntawm nws ua ntej koj qhib nws. Kev tso tus xa xov thiab tus txais xov nyob deb sib nrug tuaj yeem ua rau lub tswb tsis ua haujlwm hlo li. Ua tsaug rau

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