Indlela yokwenza VLF ngezandla aphume edayisa izinto?

Kulesi sihloko uzofunda mayelana nendlela ukwenza i-CFP ngezandla aphume edayisa izinto. Futhi ntandokazi uzonikezwa kuphela lezo zakhiwo ezingasetshenziswa ukuphindaphinda ngisho radio amateur saqala kuphela bafunda ukuzifundela schematics kagesi. Kodwa izinto zokuqala kuqala. Okokuqala kuyafaneleka ukuthi kukhona izinhlobo ezine izikimu: ku amashubhu, transistors, izifunda ehlangene, kanye elixutshwe, engase iqukathe izinhlobo eziningana amaseli. Ngokwesibonelo, preamplifier kungenziwa eyakhiwe transistors kanye ukuqeda - izibani.

Indlela ukukhetha uhlelo?

Kufanele unqume kulokho okulindele idivayisi iphinde kunoma yimuphi umkhakha bayahamba ukuyisebenzisa. It kuncike ke lokho zizosetshenziswa Ulf isikimu. Kodwa noma kunjalo, yebo, lokuzikhethela of base isici yesimanje - ikhambi ngempumelelo kakhulu. Qaphela ukuthi ubuchwepheshe isibani has ethile omkhulu - the omkhulu ugesi. Yebo futhi uthole manje transformers kuyoba nzima kakhulu. Futhi uma kungekho stock sezibani ke ukwehluleka elilodwa, ulahlekelwa ilungelo lakho. Ukuze wenze izibani Ulf izandla siqu ulula, kodwa design uphendulela nzima.

Transistor design likhanga ngaphezulu, kodwa futhi inemithwalo kusimo enkulu. Nge yinkimbinkimbi okusobala circuit uthola amandla aphansi kakhulu. Kungenzeka ukuthi ungathola omkhulu wesifunda ibhodi, lapho izakhi ahlelwe eduze komunye nomunye, futhi amandla wonke amadivayisi - akukho kuka 10 Watts. Ngakho-ke, njengoba kubasalele indlela yesithathu - ukusetshenziswa chips. Simple, okuthembekile, okuhlala isikhathi eside (ngaphansi ekusebenziseni ifoni okuvamile).

PCB

Ukuze wenze ukufakwa kungenzeka endaweni encane, ngakho kungaba okwanele ucezu ucwecwe impahla 30x30 mm. Kodwa singasebenza okuthiwa izinhlanzi - PCB ne izimbobo lokukhuphula izakhi kanye namabala amancane metal elibazungezile. Lokhu kuzoba isixazululo esingcono kakhulu. Khiqiza VLF elula ngezandla - kungcono Ngemizuzwana.

Uma kukhona nje PCB ucwecwe, kuzodingeka ukuba usike anemifantu kuso. Bazophinde ibhodi elincane empumulweni zethusi eziningana. Kubo futhi kuyoba ukufakwa kuzo zonke izingxenye amplifier. Phawula ukuthi amandla supply zingenziwa njengoba behlukile ingxenye eyinhloko i-CFP, futhi naye.

amandla amplifier

Njengomthetho, Amps basekhaya amandla okwanele volts 9-18. Lezi amagugu ejwayelekile voltage transformers kungatholakala cishe kuyo yonke indawo. Isifunda supply ejwayelekile - transformer, diodes ezine futhi capacitor ka microfarads okungenani 100 ukususa ingxenye kushintshana supply voltage.

Kodwa okuningi kuncike onjani isikimu VLF sizosetshenziswa umklamo wakho. Uma uhlela ukuba ukuqoqa Ulf ephansi amandla ke udinga ukubheka ishidi chip, lapho uya khona ukusebenzisa. Ukukhokhela ukunakekelwa okukhethekile ukuze emgqeni lapho ecacisiwe supply voltage range. Uma iconsi kuvunyelwe 5, kungenzeka ukusebenzisa ifoni ku ishaja.

Kanjani ukuze ahlangane amplifier

Ulf ku chips zidinga Ukupholisa ezengeziwe. Ngezinye izikhathi ngisho umklamo ephansi amandla zikhiphela enkulu ukushisa. Ngenxa yalokho, isidingo ukusebenzisa aluminium radiators ukuze Ukupholisa kahle.

Uma ukwakha VLF enamandla ngezandla zakho, kufanele ucabange kahle ngale nkinga lwaluyophola. Kungenzeka ukuthi isidingo olwengeziwe ukufaka ezipholile.

Ngokuvamile, inhlangano yabantwana bakwa-Ulf ngezandla zakho akufanele inkimbinkimbi. Zonke izici axhunyiwe ngokuvumelana isikimu. Futhi emva ukulawula kanye lokuqhubeka isheke akukhuthalele futhi uxhuma umthombo isignali okufakwayo. Akubuzwa, umthwalo okukhipha kuyadingeka - e isikhulumi. Ngezinye serviceable chip amplifier iqala ukusebenza ngaphandle ukumisa. Kufanele kuqashelwe ukuthi wesifunda amplifier okungcono kakhulu esinakho iwukusebenzisa nje lowo lunikeziwe ishidi chip. Kulezi imodeli amasheduli ziyabhekelelwa konke, ngisho ezicashile ezincane kunazo zonke chip ethile. Futhi izosebenza kahle kuphela ngesisekelo lezi umehluko wemisindo nemiqondo yamagama. Ukusebenzisa uhlelo ezivela emithonjeni engathembekile, uzibeka engcupheni kokulimaza chip. Futhi ngezinye izikhathi ngentengo yalo kunalokho okusezingeni eliphezulu.