FM nhepfenyuro

Iyo mini FM transmitter wedunhu kugovera

Iyi i mini FM transmitter wedunhu. Ndinofunga kuti iyi ndiyo yakapfava, yakareruka uye yechokwadi…yakachipa… Mhepo yemagetsi iri pakati pe1.1 – 3 volts uye simba rekushandisa i1.8 mA pa1.5 volts. Dunhu iri rinofanira kufukidzwa, handiti? Maximum range 30 - 50 mamita. pa1.5 volts.

transmitter circuit

Mukana mukuru wedunhu iri nderekuti sosi yemagetsi ndeye 1.5 volt bhatiri (yechero saizi), ichibvumira PCB uye bhatiri kubatwa munzvimbo yakanyanya compact. Iyo transmitter inogona kutomhanya pamabhatiri eNiCd anochajwazve, semuenzaniso 750mAh AA saizi bhatiri inogona kumhanya kwemaawa angangoita mazana mashanu (ichiri kudhonza 500mA pa1.4V) iyo yakaenzana nemazuva makumi maviri.

Iyo transistor haisi chikamu chakakosha chedunhu, asi kusarudza yakakwira frequency / yakaderera ruzha transistor inogona kubatsira kuvandudza mhando yeruzha rweiyo transmitter uye huwandu. PN2222A, 2N2222A, BFxxx nhevedzano, BC109B, C, uye kunyangwe iyo inozivikanwa BC238 inoshanda nemazvo. Chinokosha kune inoshanda zvakanaka, yakaderera-simba redunhu kushandisa yakakwira hFE / yakaderera Ceb (yemukati junction capacitance) transistors.

Haasi ese maikorofoni econdenser ane maitiro emagetsi akafanana, saka mushure mekushanda dunhu, shandisa 10K inosiyanisa resistor pane 5.6K, iyo inopa ikozvino kune maikorofoni yemukati amplifier uye inogadzirisa kune inotapira nzvimbo yekunzwika neakanakisa amplitude uye. quality . Wobva waona kukosha kweiyo inosiyana resistor uye woitsiva neyakagadziriswa resistor.

Chikamu chakakosha inductor L iyo inofanirwa kugadzirwa nemaoko. Tora chidimbu che 0.5mm (AWG24) enameled waya yemhangura woputira maviri 4-5mm dhayamita zvakasununguka kuita denderedzwa. Saizi dzewaya dzinogona kusiyana. Rimwe rose rebasa rinoenderana zvakanyanya neruzivo rwako uye nhanho yeruzivo nemainductors: Isa radio yeFM padhuze nedunhu uye isa frequency uko pasina kugamuchirwa. Isa magetsi kudunhu uye isa tsvimbo yesimbi muinductor loop kuti uone kukosha kwayo. Paunowana iyo chaiyo poindi, gadzirisa iyo looseness yeinductor uye, kana zvichidikanwa, nhamba yekutendeuka. Kana zvese zvangoshanda zvakanaka, unogona kushandisa trimmer capacitor kuita imwe frequency kugadzirisa. Panguva ino, unogona kuwana rubatsiro kubva kune mumwe munhu ane ruzivo. Usakanganwa kuchengetedza inductor kurwisa masimba ekunze nekudurura glue pamusoro payo. Kana redhiyo yekutambira ikarasika mukati memamita mashoma, izvi zvinogona kukonzerwa nekugadziriswa kwecoil isina kururama uye uri kunyatsoteerera kuharonics yetransmitter kwete yepakati frequency. Bvisa redhiyo kure nedunhu uye uigadzirise. Zviri nyore kana iwe uchiziva kushandisa oscilloscope mumamiriro ezvinhu aya.

Chikamu chimwe nechimwe chinofanira kunge chiri nyore kuisa paPCB iri pasi. Ziva kuti iyo transistor inotungamira inofanirwa kubatana nemazvo. Edzawo kubatanidza iyo inofamba chikamu che trimmer capacitor kudivi re +, izvi zvinogona kubatsira neasingadiwe frequency mashifiti paunenge uchigadzirisa. Iyo PCB dhayagiramu inofanirwa kudhindwa pa300DPI, uye faira reTIFF rakamiswa pano.

Mini FM Transmitter PCB Layout:

transmitter circuit

Technical date:

Kugovera voltage: 1.1 - 3 volts

Simba rekushandisa: 1.8 mA pa 1.5 volts

Range: kusvika 30 metres. pa1.5 volts

transmitter circuit

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