bidhaa Jamii
- FM Transmitter
- 0-50w 50w-1000w 2kw-10kw 10kw +
- TV Transmitter
- 0-50w 50-1kw 2kw-10kw
- FM Antenna
- TV Antenna
- antenna Accessory
- cable Connector Power Splitter dummy Load
- RF Transistor
- Usambazaji wa umeme
- Equipments Vifaa vya
- DTV Front Mwisho Vifaa
- Link System
- mfumo STL Microwave mfumo Link
- FM Radio
- Power mita
- Bidhaa nyingine
- Maalum kwa Coronavirus
bidhaa Tags
Fmuser Sites
- es.fmuser.net
- it.fmuser.net
- fr.fmuser.net
- de.fmuser.net
- af.fmuser.net -> Kiafrikana
- sq.fmuser.net -> Kialbeni
- ar.fmuser.net -> Kiarabu
- hy.fmuser.net -> Kiarmenia
- az.fmuser.net -> Kiazabajani
- eu.fmuser.net -> Kibasque
- be.fmuser.net -> Kibelarusi
- bg.fmuser.net -> Kibulgaria
- ca.fmuser.net -> Kikatalani
- zh-CN.fmuser.net -> Kichina (Kilichorahisishwa)
- zh-TW.fmuser.net -> Wachina (Jadi)
- hr.fmuser.net -> Kikroeshia
- cs.fmuser.net -> Kicheki
- da.fmuser.net -> Kidenmaki
- nl.fmuser.net -> Kiholanzi
- et.fmuser.net -> Kiestonia
- tl.fmuser.net -> Kifilipino
- fi.fmuser.net -> Kifini
- fr.fmuser.net -> Kifaransa
- gl.fmuser.net -> Kigalisia
- ka.fmuser.net -> Kijojiajia
- de.fmuser.net -> Kijerumani
- el.fmuser.net -> Kiyunani
- ht.fmuser.net -> Kikrioli cha Haiti
- iw.fmuser.net -> Kiebrania
- hi.fmuser.net -> Kihindi
- hu.fmuser.net -> Kihungari
- is.fmuser.net -> Kiaislandi
- id.fmuser.net -> Kiindonesia
- ga.fmuser.net -> Kiayalandi
- it.fmuser.net -> Italia
- ja.fmuser.net -> Kijapani
- ko.fmuser.net -> Kikorea
- lv.fmuser.net -> Kilatvia
- lt.fmuser.net -> Kilithuania
- mk.fmuser.net -> Kimasedonia
- ms.fmuser.net -> Kimalesia
- mt.fmuser.net -> Kimalta
- no.fmuser.net -> Kinorwe
- fa.fmuser.net -> Kiajemi
- pl.fmuser.net -> Kipolishi
- pt.fmuser.net -> Kireno
- ro.fmuser.net -> Kiromania
- ru.fmuser.net -> Kirusi
- sr.fmuser.net -> Mserbia
- sk.fmuser.net -> Kislovakia
- sl.fmuser.net -> Kislovenia
- es.fmuser.net -> Kihispania
- sw.fmuser.net -> Kiswahili
- sv.fmuser.net -> Kiswidi
- th.fmuser.net -> Thai
- tr.fmuser.net -> Kituruki
- uk.fmuser.net -> Kiukreni
- ur.fmuser.net -> Kiurdu
- vi.fmuser.net -> Kivietinamu
- cy.fmuser.net -> Kiwelsh
- yi.fmuser.net -> Yiddish
Jinsi ya DIY Bug Detector?
Date:2016/6/24 15:24:56 Hits:
Vidokezo:mzunguko hii inaweza kutumika kwa "kufagia" eneo au chumba na zinaonyesha kama kifaa ufuatiliaji ni operative. tatizo katika kufanya detector mzuri ni kupata unyeti wake tu haki; sana na itakuwa kujibu matangazo ya redio, unyeti kidogo sana na hakuna kitu kusikilizwa.
Mradi huu ina vipengele kadhaa, inaweza kufanywa juu ya veroboard na powered kutoka 9 volt betri kwa portability. mfano My hapa chini, kazi OK juu ya Eurobreadboard.
Circuit kazi ni rahisi. inductor ni molded RF coil, thamani ya 0.389uH na inapatikana kutoka Maplin Electronics, ili kificho UF68Y. (Angalia viungo yangu ukurasa kwa wasambazaji sehemu.) Coil ina sana Q sababu ya juu 170 na ni untuned au broadband. Pamoja mtihani oscillator mzunguko huu alijibu kwa masafa kutoka 70 MHz kwa 150 MHz, wengi wa mende FM ni iliyoundwa kufanya kazi katika biashara receiver mbalimbali ya 87 - 108 MHz. RF ishara ilichukua coil, na kwa bahati kitengo hiki kujibu asubuhi au FM modulering au tu carrier wimbi wazi, ni rectified na OA91 diode. Hii ndogo DC voltage ni ya kutosha kwa upset upendeleo wa FET, na kutoa dalili juu ya mita. FET kutambua MPF102 au 2N3819, mita inavyoonekana katika picha ni tena kutoka Maplin Electronics, ili kificho LB80B na ina 250 Ua wadogo kamili deflection. Mita kwa FSD ya 50 100 au Ua inaweza kutumika kwa ajili unyeti juu.
Katika matumizi preset ni kubadilishwa kwa sifuri kusoma juu ya mita. detector ni kisha walibeba kuzunguka chumba, ndogo betri transmitter itakuwa deflect mita kutoka miguu wachache mbali.
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