AVT732 B. Whisper - Whisper Hunter

Kushanda kwehurongwa kunoita kushamisa kunoshamisa pamushandisi. Kuzevezera kwakanyarara uye ruzha rusinganzwike rwunowedzerwa kuitira chiitiko chekuteerera chisingakanganwike.

Dunhu racho rakakwana kune kwakasiyana kuyedza kwakabatana nekukwidziridzwa kwemanzwi akasiyana. Izvi zvinogona kubatsira kune vanhu vane kuderera kwekunzwa kurasikirwa, uye zvakare iri yakanakira sisitimu yekutarisa kurara kwakazorora kwevana vadiki. Ichakosheswawo nevanhu vanoda kukurukurirana nemasikirwo.

Tsanangudzo yehurongwa

Chiratidzo kubva kuM1 electret maikorofoni inodyiswa kusvika padanho rekutanga - isiri-inverting amplifier ine IS1A. Kuwana kunogara kuripo uye ndeye 23x (27 dB) - yakatemwa nevanopikisa R5, R6. Iyo pre-amplified siginecha inopihwa kune inverting amplifier ine IC1B cube - pano kuwana, kana kuti attenuation, inotarwa nereshiyo yeanoshanda kupokana kweiyo potentiometers R11 uye R9 uye inogona kusiyana mukati me0 ... 1. Iyo sisitimu inofambiswa nemhepo imwe chete, uye izvo zvinhu R7, R8, C5 zvinoumba yekugadzira pasi redunhu. Sefa matunhu C9, R2, C6 uye R1, C4 inodiwa mune yakanyanya kuwana hurongwa uye basa ravo nderekudzivirira kuzvidzora kunokonzerwa nekupinda kwechiratidzo kuburikidza nemagetsi emagetsi.

Pakupera kweiyo track, yakakurumbira TDA2 IC7050 simba amplifier yakashandiswa. Mune yakajairwa application system, inoshanda senge-maviri chiteshi amplifier ine kuwana kwe20 × (26 dB).

Mufananidzo 1. Schematic diagram

Kuiswa uye kugadzirisa

Dhiyagiramu yedunhu uye kutaridzika kwePCB inoratidzwa muFigure 1 uye 2. Izvo zvikamu zvinofanirwa kutengeswa kuPCB, zviri nani muhurongwa hunoratidzwa muchikamu chechikamu. Paunenge uchiunganidza, iwe unofanirwa kubhadhara zvakanyanya kune nzira yekushongedza matanda: electrolytic capacitors, transistor, diodes. Iyo cutout muchiitiko chekumira uye dunhu rakabatanidzwa rinofanira kuenderana nedhirowa pabhodhi redunhu rakadhindwa.

Maikorofoni ye electret inogona kubatanidzwa newaya mapfupi (kunyangwe neakachekwa-kubvisa resistor magumo), kana newaya refu. Chero zvazvingava, teerera kune polarity yakanyorwa pamufananidzo uye bhodhi - mune maikorofoni, kuguma kusina kunaka kwakabatana nesimbi kesi.

Mushure mekuunganidza sisitimu, zvinodikanwa kuti utarise zvakanyanya kana zvinhu zvakatengeswa munzira isiriyo kana munzvimbo dzisina kunaka, ingave iyo solder point yakavharwa panguva yekushambadzira.

Mushure mekutarisa gungano rakakodzera, unogona kubatanidza mahedhifoni uye sosi yemagetsi. Yakasanganiswa isina mhosva kubva kumabasa ekushanda, iyo amplifier ichakurumidza kushanda nemazvo. Kutanga shandura potentiometer kusvika kudiki, i.e. kuruboshwe, uye zvishoma nezvishoma kuwedzera inzwi. Kuwedzera kupfuma kuchaita kuti uzvimutse (panzira mahedhifoni - maikorofoni) uye isingafadzi, kurira kukuru.

Iyo sisitimu inofanirwawo kupihwa simba neina AA kana AAA zvigunwe. Inogona zvakare kufambiswa ne4,5V kusvika 6V plug-in magetsi.