AVT5789 LED dimming maub los nrog qhov sib thooj sensor
Tus neeg tsav tsheb tau pom zoo rau LED strips thiab qee qhov 12VDC LED teeb tsis muaj tam sim no thiab voltage kev tswj Circuit Court, nrog rau cov tsoos 12VDC halogen thiab incandescent teeb. Nqa koj txhais tes los ze rau lub sensor activates lub kaw lus, maj mam illuminating lub teeb qhov chaw txuas rau lub qhov hluav taws xob system. Tom qab txoj kev ntawm tes, nws yuav du, maj mam fading.
Lub module teb rau qhov ze-up los ntawm qhov deb ntawm 1,5...2 cm. Lub sijhawm ntawm lub teeb ci thiab qhov tsaus ntuj yog li 5 vib nas this. Tag nrho cov txheej txheem qhia meej yog teeb liab los ntawm qhov flashing ntawm LED 1, thiab tom qab nws ua tiav, LED yuav teeb mus tas li. Tom qab qhov kawg ntawm kev tua, LED yuav tua.
Kev tsim kho thiab kev ua haujlwm
Daim duab kos duab ntawm tus maub los yog qhia hauv daim duab 1. Nws yog kev cob cog rua ntawm lub hwj huam mov thiab lub receiver. Nws yuav tsum tau siv los ntawm qhov hluav taws xob tas li, nws tuaj yeem yog lub roj teeb lossis ib qho chaw siv hluav taws xob nrog cov khoom siv tam sim no sib txuas nrog cov khoom sib txuas. Diode D1 tiv thaiv kev sib txuas ntawm qhov hluav taws xob nrog qhov tsis ncaj ncees lawm polarity. Lub input voltage yog nkag mus rau lub stabilizer IC1 78L05, capacitors C1 ... C8 muab qhov tseeb filtering ntawm no voltage.
Daim duab 1. Cov kab hluav taws xob tswj kab hluav taws xob
Lub kaw lus yog tswj los ntawm IC2 ATTINY25 microcontroller. Lub ntsiab actuating yog transistor T1 hom STP55NF06. Ib qho tshwj xeeb AT42QT1011 nti los ntawm Atmel, raug xaiv los ua IC3, tau siv los ua qhov sib thooj. Nws yog txawm peem rau nrog ib tug sib thooj teb thiab ib tug digital tso zis uas qhia tau hais tias ib theem siab thaum txhais tes mus rau lub sensor. Kev kuaj pom ntau yog tswj hwm los ntawm lub peev xwm ntawm lub capacitor C5 - nws yuav tsum nyob rau hauv 2 ... 50 nF.
Nyob rau hauv cov qauv system, lub hwj chim yog xaiv kom lub module teb rau ib tug ze-up los ntawm ib tug deb ntawm 1,5-2 cm.
Kev txhim kho thiab kho
Lub module yuav tsum tau sib sau ua ke rau ntawm lub rooj tsavxwm luam tawm, daim duab sib dhos uas muaj nyob rau hauv daim duab 2. Lub rooj sib dhos ntawm lub kaw lus yog qhov raug thiab yuav tsum tsis txhob ua teeb meem, thiab lub module tam sim ntawd npaj siv tom qab sib dhos. Ntawm daim duab. 3 qhia txog txoj kev sib txuas.
Rice. 2. PCB layout nrog cov ntsiab lus
Qhov sib thooj sensor input cim S yog siv los txuas qhov sib thooj teb. Qhov no yuav tsum yog qhov chaw ntawm cov khoom siv hluav taws xob, tab sis nws tuaj yeem npog nrog ib txheej insulating. Lub xovtooj ntawm tes yuav tsum tau txuas nrog lub kaw lus nrog lub sijhawm luv tshaj plaws. Yuav tsum tsis txhob muaj lwm cov xaim hluav taws xob lossis qhov chaw nyob ze. Qhov chaw tsis sib cuag tuaj yeem yog tus kov, lub txee hlau kov lossis aluminium profile rau LED strips. Tig lub kaw lus kaw lub zog thiab rov ua dua txhua zaus koj hloov pauv lub ntsiab lus kov. Qhov kev xav tau no yog txiav txim siab los ntawm qhov tseeb tias tsuas yog tam sim ntawd tom qab lub hwj chim qhib ua lub sijhawm luv luv thiab ntsuas qhov ntsuas ntawm qhov ntsuas thiab qhov chaw sib thooj.
Daim duab 3. Daim duab qhia kev sib txuas
Txhua qhov tsim nyog rau txoj haujlwm no suav nrog AVT5789 B cov khoom siv rau PLN 38, muaj nyob ntawm:
