AVT795 - inomhanya mwenje
Vanhu vakawanda vanoda kufarira zvemagetsi uye kuvaka matunhu akasiyana-siyana, asi vanofunga kuti zvakaoma zvikuru. Chero ani zvake ane chido chakasimba anogona kubudirira kutora zvemagetsi sechinhu chinoyevedza, chine shungu zvakanyanya. Kune avo vanoda kutanga mutambo wavo wemagetsi ipapo asi vasingazive kuti sei, AVT inopa nhevedzano yemapurojekiti akareruka ane manhamba matatu AVT7xx. Imwe kubva munhevedzano iyi ndiyo "running light" AVT795.
Mhedzisiro yecheni yemwenje inoburitsa nhevedzano yekupenya inoyeuchidza yekudonha kwemeteorite. Iyo yakaratidzwa yemagetsi sisitimu inogona kushandiswa, pakati pezvimwe zvinhu, sevaraidzo yematoyi kana showcase, uye nekuda kwekushandiswa kweakawanda akadaro masisitimu ane akasiyana ma LED mavara, kunyangwe yepati yemba diki. Kusvika pakuziva musimboti wekushanda kuchakubvumidza iwe kushandisa mhedzisiro yekufamba mwenje nenzira inotowedzera kugadzira.
Sei kushanda?
Schematic diagiramu ye dimmer inoratidzwa mukati Mufananidzo 1. Chinhu chakakosha ndeye counter U1. Kaunda iyi inodzorwa nemajenareta maviri. Nguva yekutenderera yejenereta yakavakirwa paU2B amplifier ingangoita 1 s, nepo nguva yenzvimbo yepamusoro pakubuda kwejenareta iyi inosvika kagumi zvishoma nekuda kwekuvapo kweD1 neR5.
1. Mufananidzo wemagetsi wegadziriro
Kwenguva yose yehupamhi hwepamusoro paRES input - pini 15, iyo counter is reset, i.e. nzvimbo yakakwirira iripo pakubuda Q0, iyo isina LED yakabatana. Pakupera kwekugadzirisa zvakare, iyo counter inotanga kuverenga pulses kubva kune jenereta, yakavakwa paU2A amplifier, inopiwa kune CLK kupinza kwemamita - mira 14. Mune rhythm yejenereta, yakavakwa paU2A amplifier, diodes. D3 ... D8 ichavhenekera. vhenekera mumwe nemumwe. Kana yakakwira nzvimbo paQ9 inobuda yakabatana neiyo ENA yekuisa - pini 13, iyo counter inomira kuverenga mapulses - ese maLED acharamba akavharwa kudzamara counter yagadzikiswa nejenareta yakavakirwa paU2B amplifier, inotanga kutenderera kutsva. uye gadzira nhevedzano yekupenya. Saizvozvo, iyo diode haina kuvhenekera kana yakakwira mamiriro painobuda jenareta yakavakirwa paU2B amplifier uye paRES kupinza kweU1 cube. Izvi zvichagadzirisa counter U1. Supply voltage renji 6…15 V, avhareji yekushandisa ikozvino nezve 20 mA pa12 V.
Kugona kuchinja
Iyo marongerwo inogona kuchinjwa nenzira dzakawanda sezvaunoona zvakakodzera. Chokutanga pane zvose, muhurongwa hwekutanga, unogona kushandura nguva yekudzokorora kwezvikamu zvekupenya nekushandura capacitance C1 (100 ... 1000 μF) uye, zvichida, R4 (4,7 kOhm ... ) uye kuramba R220 (2) kOhm ... 1 kOhm). Nekuda kwekushaikwa kweazvino kumisa resistor, ma LED anopenya.
Iyo modhi system inoshandisa yeyero LEDs. Hapana chinokutadzisa kushandura ruvara rwavo uye kushandisa akati wandei eaya masisitimu, ayo anogona kuve kuwedzera kukuru kune kuvhenekera kwezvivakwa zvakawanda zvekugara. Nemagetsi ekupa 12 V, pachinzvimbo cheimwe diode, unogona kubatanidza zvakachengeteka maviri kana kunyange matatu diode munhevedzano uye nokudaro kuvaka cheni yemwenje ine akati wandei maLED.
Kuiswa uye kugadzirisa
Mufananidzo wemusoro uchave unobatsira panguva yekuisa basa. Kunyangwe vagadziri vasina ruzivo vanozosangana nekusangana kwehurongwa, uye zviri nani kutanga nhanho iyi nekutengesa zvinhu kune yakadhindwa redunhu bhodhi, kutanga nediki uye kupera nehukuru. Kutevedzana kwegungano kunokurudzirwa kunoratidzwa muchikamu chezvikamu. Muchiitiko ichi, nyatsoteerera kune nzira ye soldering pole elements: electrolytic capacitors, diodes uye integrated circuits, iyo cutout munyaya iyo inofanira kufanana nemuenzaniso pabhodhi redunhu rakadhindwa.
Mushure mekutarisa kuisirwa kwakaringana, iwe unofanirwa kubatanidza iyo yakagadzika magetsi emagetsi, pamwe nevoltage ye9 ... 12 V, kana alkaline 9-volt bhatiri. Rysunek 2 inoratidza nzira yekubatanidza zvakanaka magetsi kubhodhi redunhu uye inoratidza kutevedzana kwekubatidza maLED. Yakanyatso kuunganidzwa kubva kuzvinhu zvekushanda, iyo sisitimu inozoshanda nemazvo uye haidi chero kumisikidzwa kana kutanga. Iyo yakadhindwa yedunhu bhodhi ine gomba rinokwira uye mana solder mapoinzi kwaunogona solder kucheka zvimedu zvesilverware kana kucheka kumigumo yevanopikisa mushure mekutengesa. Kutenda kwavari, iyo yakapedzwa system inogona kusungirirwa nyore nyore kana kuiswa pamusoro peiyo yakapihwa iyi.
2. Kubatana kwakarurama kwemagetsi kubhodhi uye kurongeka kwekushandura ma LED.
Zvese zvinodikanwa zvepurojekiti iyi zvinosanganisirwa muAVT795 B kit yePLN 16, inowanikwa pa:
