AVT795 - kuwala
Anthu ochulukirachulukira akufuna kukhala ndi chidwi ndi zamagetsi ndikupanga madera osiyanasiyana, koma akuganiza kuti ndizovuta kwambiri. Aliyense amene ali ndi chifuno champhamvu atha kugwiritsa ntchito zida zamagetsi ngati zosangalatsa, zokonda kwambiri. Kwa iwo amene akufuna kuyamba ulendo wawo wamagetsi nthawi yomweyo koma osadziwa momwe angachitire, AVT imapereka mapulojekiti osavuta omwe ali ndi zilembo zitatu za AVT7xx. Wina kuchokera mndandandawu ndi "running light" AVT795.
Zotsatira za tcheni chowala chotulutsa zowunikira zingapo zimakumbukira kugwa kwa meteorite. Dongosolo lamagetsi loperekedwa lingagwiritsidwe ntchito, mwa zina, ngati zosangalatsa zoseweretsa kapena zowonetsera, komanso chifukwa chogwiritsa ntchito machitidwe angapo okhala ndi mitundu yosiyanasiyana ya LED, ngakhale paphwando lanyumba yaying'ono. Kudziwa mfundo yoyendetsera ntchitoyi kudzakuthandizani kugwiritsa ntchito mphamvu ya kuwala koyendayenda m'njira yodabwitsa kwambiri.
Kodi ntchito?
Chithunzi chojambula cha dimmer chikuwonetsedwa mu Chithunzi 1. Chinthu choyambirira ndi counter U1. Kauntala iyi imayendetsedwa ndi ma jenereta awiri. Nthawi yozungulira ya jenereta yomangidwa pa amplifier ya U2B ndi pafupifupi 1 s, pomwe nthawi yayitali pakutulutsa kwa jenereta iyi ndi pafupifupi kuchepera khumi chifukwa cha kukhalapo kwa D1 ndi R5.
1. Chithunzi chamagetsi cha dongosolo
Kwa nthawi yonse ya chikhalidwe chapamwamba pakulowetsa RES - kutulutsa 15, kauntala imakonzedwanso, i.e. malo apamwamba alipo pa zotsatira za Q0, zomwe palibe ma LED olumikizidwa. Pamapeto pa kuyambiransoko, cholemberacho chimayamba kuwerengera ma pulse kuchokera ku jenereta yomangidwa pa U2A amplifier, yogwiritsidwa ntchito ku CLK kulowetsa kwa mita - mapazi 14. Mu rhythm ya jenereta yomangidwa pa U2A amplifier, diodes D3 . .. D8 idzawala. kuyatsa motsatira. Mawonekedwe apamwamba akuwonekera pazotulutsa za Q9 zolumikizidwa ndi kulowetsa kwa ENA - pini 13, kauntala imasiya kuwerengera ma pulse - ma LED onse azikhala ozimitsa mpaka kauntala ikakhazikitsidwanso ndi jenereta yomangidwa pa U2B amplifier, iyamba kuzungulira kwatsopano. ndi kutulutsa zowalitsa zingapo. Mofananamo, diode imazimitsidwa pamene dziko lapamwamba likuwonekera pa kutuluka kwa oscillator yomangidwa pa amplifier U2B ndi polowetsa RES ya kyubu U1. Izi zidzakhazikitsanso counter U1. Ma voliyumu amtundu wa 6…15 V, omwe amagwiritsa ntchito pafupifupi 20 mA pa 12 V.
Kuthekera kwa kusintha
Kapangidwe kake kakhoza kusinthidwa m'njira zambiri momwe mukuwonera. Choyamba, mu dongosolo loyambira, mukhoza kusintha nthawi yobwerezabwereza ya mndandanda wa kuwala mwa kusintha capacitance C1 (100 ... 1000 μF) ndipo, mwina, R4 (4,7 kOhm ... ) ndi kukana R220 (2) kOm ... 1 kOm). Chifukwa cha kusowa kwa chotchinga choletsa chapano, ma LED ndi owala kwambiri.
Dongosolo lachitsanzo limagwiritsa ntchito ma LED achikasu. Palibe chomwe chimakulepheretsani kusintha mtundu wawo ndikugwiritsa ntchito zingapo mwa machitidwewa, omwe angakhale owonjezera kwambiri pakuwunikira kwa nyumba zambiri zogona. Ndi mphamvu yamagetsi ya 12 V, m'malo mwa diode imodzi, mutha kulumikiza bwino ma diode awiri kapena atatu motsatizana ndikumanga unyolo wowala wokhala ndi ma LED angapo.
Kuyika ndi kusintha
Chithunzi chamutu chidzakhala chothandiza pa ntchito yoyika. Ngakhale okonza osadziwa zambiri adzatha kuthana ndi kusonkhana kwa dongosololi, ndipo ndibwino kuti muyambe sitejiyi mwa kugulitsa zinthuzo ku bolodi losindikizidwa, kuyambira ndi zazing'ono kwambiri mpaka zazikulu. The analimbikitsa msonkhano zinayendera asonyezedwa mu zigawo mndandanda. Pochita izi, perekani chidwi chapadera pa njira yazitsulo zazitsulo: electrolytic capacitors, diode ndi mabwalo ophatikizika, odulidwa omwe ayenera kufanana ndi chitsanzo pa bolodi losindikizidwa.
Mukayang'ana kuyika koyenera, muyenera kulumikiza magetsi okhazikika, makamaka ndi magetsi a 9 ... 12 V, kapena batri ya alkaline 9-volt. Rysunek 2 ikuwonetsa momwe mungalumikizire bwino magetsi ku bolodi la dera ndikuwonetsa kutsata kwa kuyatsa ma LED. Kuphatikizidwa bwino kuchokera kuzinthu zogwirira ntchito, dongosololi lidzagwira ntchito moyenera ndipo silifuna kasinthidwe kapena kukhazikitsa. The kusindikizidwa dera bolodi ali okwera dzenje ndi mfundo zinayi solder kumene mukhoza solder kudula zidutswa za silverware kapena kudula malekezero resistors pambuyo soldering. Chifukwa cha iwo, dongosolo lomalizidwa likhoza kumangirizidwa mosavuta kapena kuikidwa pamtunda woperekedwa kwa izi.
2. Kulumikizana kolondola kwa magetsi ku bolodi ndi dongosolo la kuyatsa ma LED.
Magawo onse ofunikira pantchitoyi akuphatikizidwa mu zida za AVT795 B za PLN 16, zomwe zikupezeka pa:
