AVT5789 LED dimming controller yokhala ndi sensor yoyandikira

Dalaivala akulimbikitsidwa kuti azipanga zingwe za LED ndi nyali zina za 12V DC za LED zopanda malamulo apano ndi magetsi, komanso nyali zachikhalidwe za 12V DC halogen ndi incandescent. Kubweretsa dzanja lanu pafupi ndi sensa kumayendetsa dongosolo, ndikuwunikira pang'onopang'ono gwero lowala lomwe limalumikizidwa ndi kutulutsa kwadongosolo. Pambuyo pa kuyandikira kwa manja, zidzakhala zosalala, pang'onopang'ono kuzimiririka.

Gawoli limayankha pafupi ndi mtunda wa 1,5 ... 2 cm. Kutalika kwa ntchito yowunikira ndi mdima ndi pafupifupi masekondi 5. Njira yonse yowunikira imasonyezedwa ndi kunyezimira kwa LED 1, ndipo ikamalizidwa, LED idzayatsidwa kosatha. Pambuyo pa kutha kwa kuzimitsa, LED idzazimitsa.

Kumanga ndi ntchito

Chithunzi chozungulira cha woyang'anira chikuwonetsedwa mu Chithunzi 1. Zimagwirizanitsidwa pakati pa magetsi ndi wolandira. Iyenera kukhala yoyendetsedwa ndi voteji nthawi zonse, ikhoza kukhala batri kapena gwero lililonse lamagetsi lomwe lili ndi katundu wapano wofanana ndi katundu wolumikizidwa. Diode D1 imateteza ku kulumikizana kwa magetsi ndi polarity yolakwika. Mphamvu yolowera imaperekedwa ku stabilizer IC1 78L05, capacitors C1 ... C8 imapereka kusefa koyenera kwa voteji iyi.

Chithunzi 1. Chithunzi cha Wiring Wiring

Dongosololi limayendetsedwa ndi IC2 ATTINY25 microcontroller. Chinthu chothandizira ndi transistor T1 mtundu wa STP55NF06. Chip chapadera cha AT42QT1011 chochokera ku Atmel, chotchedwa IC3, chinagwiritsidwa ntchito ngati chowunikira pafupi. Ili ndi gawo limodzi loyandikira komanso kutulutsa kwa digito komwe kumawonetsa kuchuluka kwakukulu pamene dzanja likuyandikira sensa. Mitundu yodziwika bwino imayendetsedwa ndi mphamvu ya capacitor C5 - iyenera kukhala mkati mwa 2 ... 50 nF.

Mu dongosolo lachitsanzo, mphamvu imasankhidwa kuti gawoli liyankhe pafupi ndi mtunda wa 1,5-2 cm.

Kuyika ndi kusintha

Gawoli liyenera kusonkhanitsidwa pa bolodi ladera losindikizidwa, chithunzi cha msonkhano chomwe chikuwonetsedwa mu Chithunzi 2. Msonkhano wa dongosololi ndi wofanana ndipo suyenera kuyambitsa mavuto, ndipo gawoli liri lokonzeka kugwira ntchito pambuyo pa msonkhano. Pa mkuyu. 3 ikuwonetsa njira yolumikizirana.

Mpunga. 2. Kapangidwe ka PCB ndi dongosolo la zinthu

Cholowera cha sensor chapafupi cholembedwa S chimagwiritsidwa ntchito kulumikiza gawo loyandikira. Izi ziyenera kukhala pamwamba pa zinthu zochititsa chidwi, koma zikhoza kuphimbidwa ndi wosanjikiza. Selo liyenera kulumikizidwa ku dongosolo ndi chingwe chachifupi kwambiri. Pasakhale mawaya ena oyendetsa kapena malo pafupi. Malo osalumikizana nawo amatha kukhala chogwirira, chogwirira kabati yachitsulo kapena mbiri ya aluminiyamu ya zingwe za LED. Zimitsani mphamvu yamakina ndikuyatsanso nthawi iliyonse mukasintha gawo la touch field. Kufunika kumeneku kumatsimikiziridwa ndi mfundo yakuti pokhapokha mphamvu itatsegulidwa pamene cheke chachifupi ndi kuwerengetsa kwa sensa ndi malo oyandikana nawo zimachitika.

Chithunzi 3. Chithunzi cholumikizira chowongolera

Magawo onse ofunikira pantchitoyi akuphatikizidwa mu zida za AVT5789 B za PLN 38, zomwe zikupezeka pa: