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BOJIbTMETP - MHflMKATOP

flJlfl JIABOPATOPHOrO EJ10KA nMTAHMfl

CaMoe npocToe - CAenaTb BonbTMeTp Ha CTpenoHHOM H3MepiiTenbHOH ronoBKe. Ho sto y>Ke He TaK coBpeMeHHO u He AOcraTOHHO tomho, noaTOMy, cne^yłoiMee no npocTOTe - sto BOflbTMeTp nocroflHHoro TOKa Ha MHKpocxeMe TVina ICL7107 (Bpofle OTenecTBeHHoii K572riB2, To/ibKo cxeMa BKnKNeHwn HeMHoro omnHa-eTcn). BonbTMeTp Ha HeTbipexpa3pnAH0M ceMM-cerMeHTHOM cbctoahoahom MHAMKaTope, c MaKCHMa/ibHbiM noKa3aHneM «1999». Ha pncyH-Ke noKa3aHa TMnoBan ynpooieHHan cxeMa. riepeKnłOHaTeneM mo>kho Bbi6npaTb npeAenbi M3MepeHnn (oh nepeKnionaeT pe3Hcropbi bxoa-Horo AenMTenn). rioACTpoeMHbiM pesncTopOM R6 K)CTnpyK)T npn6op.

OAHa npoóneMa c nHTaHMeM, TaK KaK Hy>KHO ABynonnpHoe HanpnweHMe ±5V, npimeM, bxoa He Aon>xeH 6bm> «3a3eMneH» Ha WMHbi nMTaHMfl min Ha o6lmmm npOBOA. EcTb onncaHnn BonbTMeTpOB, b KOTOpbix npeAnpMHATbi cneuM-anbHbie Mepbi, cAenaHbi BcrpoeHHbie mctoh-hmkm OTpnqaTenbHoro HanpnweHHn, ho b MoeM cnynae sto Obino M3nniuHHM ycno>KHeHMeM.

A Ae^o b tom, hto na6opaTopHbiM 6/iok nirraHMH 6bin caMOAenbHbiM Ha ocHOBe TpaHC-0opMaTOpa TC-180 ot CTaporo Mepno-6enoro naMnoBoro TeneBM3opa. 3to oneHb xopownM TpaHcc^opMaTop, c 6onbiuMM HaOopoM o6mo-tok, cpeAM KOTopbix ecTb u HecKo/ibKO Haxanb-Hbix o6motok no ~6,3V. 3aAewcTBOBaHbi b cxeMe 6noKa 6binn AaneKO He Bce H3 hhx, y>K KaK MMHHMyM OAHa O0MOTKa OCTanaCb CBO0OA-hom. Bot Ha Hew u 6bino peiueHO CAenaTb ABynonnpHbin mctohhhk nMTaHHn ±5V. Bbinpn-MMTenb OAHononynepwoAHbiM, ahoa VD2 BbinpnMnneT 0Tpm_iaTenbHyK> nonyBonHy, a VD3 - nono>KHTenbHyK). TaK KaK nono>KMTenb-HbiM Hanpn>KeHMeM nuTaeTcn He TonbKO MMC, ho u MHAMKaTopbi, T3M ncnonb3yeTcn OTHOCM-TenbHo MoiMHbm CTa6nnn3aTop 7805, a otpm-MaTenbHoe He TpeOyeT óonbworo TOKa, noTOMy TaM napaMeTpMHecKMM CTa6nnn3aTop Ha pe3nc-Tope u cTa6nnnTpone.

MutuaKoe (l.A.

8

fA$U9k9Htl*pykl*9p 07-20 ff