AVT795 - khiav lub teeb
Ntau thiab ntau tus neeg xav xyaum xav txog kev siv hluav taws xob thiab tsim ntau yam circuits, tab sis lawv xav tias nws nyuaj heev. Txhua tus neeg uas muaj lub siab xav muaj peev xwm ua tiav cov khoom siv hluav taws xob ua kom zoo nkauj, nyiam nyiam nyiam nyiam. Rau cov neeg uas xav pib lawv txoj kev taug txuj kev nyuaj hauv hluav taws xob tam sim ntawd tab sis tsis paub yuav ua li cas, AVT muaj cov haujlwm yooj yim nrog peb tus lej xaiv AVT7xx. Lwm qhov ntawm cov koob no yog "khiav teeb" AVT795.
Cov nyhuv ntawm ib lub teeb sawb ua ib tug series ntawm flashes yog reminiscent ntawm lub caij nplooj zeeg meteorite. Cov khoom siv hluav taws xob uas tau nthuav tawm tuaj yeem siv tau, thiab lwm yam, ua kev lom zem rau cov khoom ua si lossis cov khoom ua yeeb yam, thiab vim yog siv ntau lub tshuab nrog cov xim sib txawv ntawm LEDs, txawm tias yog ib lub tsev me me. Kev paub txog lub hauv paus ntsiab lus ntawm kev ua haujlwm yuav tso cai rau koj siv cov nyhuv ntawm lub teeb mus ncig hauv txoj kev muaj tswv yim ntau dua.
Ua li cas nws ua hauj lwm?
Schematic daim duab ntawm lub dimmer yog qhia nyob rau hauv Daim duab 1. Lub hauv paus ntsiab lus yog counter U1. Cov txee no yog tswj los ntawm ob lub tshuab hluav taws xob. Lub sijhawm voj voog ntawm lub tshuab hluav taws xob ua rau ntawm U2B amplifier yog li 1 s, thaum lub sij hawm ntawm lub xeev siab ntawm cov zis ntawm lub tshuab hluav taws xob no yog kwv yees li kaum zaus vim muaj D1 thiab R5.
1. Daim duab hluav taws xob ntawm qhov system
Rau tag nrho lub sijhawm ntawm lub xeev siab ntawm RES cov tswv yim - tus pin 15, lub txee rov pib dua, piv txwv li. lub xeev siab yog tam sim no ntawm cov zis Q0, uas tsis muaj LED txuas. Thaum kawg ntawm kev pib dua mem tes, lub txee pib suav pulses los ntawm lub tshuab hluav taws xob, ua rau ntawm U2A amplifier, muab rau CLK input ntawm lub 'meter' - nres 14. Nyob rau hauv lub suab nrov ntawm lub tshuab hluav taws xob, ua rau ntawm U2A amplifier, diodes. D3 ... D8 yuav taws. teeb ib leeg ib leeg. Thaum lub xeev siab tshwm sim ntawm Q9 cov zis txuas nrog ENA cov tswv yim - tus pin 13, lub txee yuav tsum tsis suav cov pulses - tag nrho cov LEDs yuav nyob twj ywm kom txog thaum lub txee rov pib dua los ntawm lub tshuab hluav taws xob ua rau ntawm U2B amplifier, nws yuav pib lub voj voog tshiab. thiab tsim ib tug series ntawm flashes. Ib yam li ntawd, lub diode tsis teeb thaum lub xeev siab tshwm ntawm qhov tso zis ntawm lub tshuab hluav taws xob ua rau ntawm U2B amplifier thiab ntawm RES input ntawm U1 lub voos xwmfab. Qhov no yuav rov pib dua counter U1. Kev siv hluav taws xob ntau 6… 15 V, qhov nruab nrab siv tam sim no txog 20 mA ntawm 12 V.
Muaj peev xwm hloov tau
Cov txheej txheem tuaj yeem hloov tau ntau txoj hauv kev raws li koj pom zoo. Ua ntej ntawm tag nrho cov, nyob rau hauv lub hauv paus system, koj muaj peev xwm hloov lub repetition lub sij hawm ntawm ib tug series ntawm flashes los ntawm kev hloov lub capacitance C1 (100 ... 1000 μF) thiab, tejzaum nws, R4 (4,7 kOhm ... ) thiab kuj R220 (2). kOhm ... 1 kOhm). Vim tsis muaj qhov txwv tam sim no, LEDs kuj ci.
Cov qauv qauv siv cov xim daj LEDs. Tsis muaj dab tsi tiv thaiv koj los ntawm kev hloov lawv cov xim thiab siv ob peb lub tshuab no, uas tuaj yeem ua tau zoo ntxiv rau cov teeb pom kev zoo ntawm ntau lub tsev nyob. Nrog rau cov khoom siv hluav taws xob ntawm 12 V, tsis yog ib lub diode, koj tuaj yeem ruaj ntseg txuas ob lossis peb lub diodes hauv cov koob thiab yog li tsim cov saw teeb uas muaj ob peb LEDs.
Kev txhim kho thiab kho
Daim duab npe yuav muaj txiaj ntsig zoo thaum ua haujlwm installation. Txawm tias tsawg dua cov neeg tsim qauv yuav tiv nrog kev sib dhos ntawm lub kaw lus, thiab nws yog qhov zoo tshaj plaws los pib qhov theem no los ntawm soldering cov ntsiab lus rau lub rooj tsavxwm luam tawm, pib nrog qhov tsawg tshaj plaws thiab xaus nrog qhov loj tshaj plaws. Qhov pom zoo sib dhos ua ntu zus yog qhia hauv cov npe khoom. Nyob rau hauv tus txheej txheem, them tshwj xeeb mloog mus rau cov txheej txheem ntawm soldering ncej ntsiab: electrolytic capacitors, diodes thiab integrated circuits, lub cutout nyob rau hauv cov ntaub ntawv ntawm uas yuav tsum phim tus qauv ntawm lub Circuit Court board.
Tom qab kuaj xyuas qhov kev teeb tsa kom raug, koj yuav tsum txuas lub zog ruaj khov, nyiam dua nrog lub zog ntawm 9 ... 12 V, lossis alkaline 9-volt roj teeb. Rysunek 2 qhia tau hais tias yuav ua li cas txuas cov khoom siv hluav taws xob kom zoo rau lub rooj tsav xwm hauv Circuit Court thiab qhia qhov sib lawv liag ntawm kev tig ntawm LEDs. Kev sib dhos kom raug los ntawm cov khoom ua haujlwm, lub kaw lus yuav ua haujlwm sai sai thiab tsis tas yuav muaj kev teeb tsa lossis tso tawm. Lub rooj tsav xwm luam tawm muaj lub qhov txuas thiab plaub lub ntsiab lus uas koj tuaj yeem txiav cov khoom siv nyiaj los yog txiav tawm qhov kawg ntawm cov resistors tom qab soldering. Ua tsaug rau lawv, cov txheej txheem tiav tuaj yeem txuas tau yooj yim lossis muab tso rau ntawm qhov chaw muab rau qhov no.
2. Kev sib txuas kom raug ntawm cov khoom siv hluav taws xob rau lub rooj tsavxwm thiab kev txiav txim ntawm kev xa cov LEDs.
Txhua qhov tsim nyog rau txoj haujlwm no suav nrog AVT795 B cov khoom siv rau PLN 16, muaj nyob ntawm:
