Cov txheej txheem:
- Khoom siv
- Kauj Ruam 1: Daim duab Circuit Court
- Kauj Ruam 2: PCB Txheej Txheem
- Kauj Ruam 3: Tiav Board
Video: Teeb Dimmer (PCB Txheej Txheem): 3 Cov Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25
Nyob zoo cov menyuam !!
Ntawm no kuv tab tom qhia koj cov txheej txheem PCB ntawm Lub Teeb dimmer Circuit siv qhov nrov tshaj timer IC 555. Qhov Circuit no tseem tuaj yeem siv los tswj qhov ceev ntawm DC lub cev muaj zog ntawm qhov ntsuas qis. Lub timer IC tuaj yeem ua haujlwm hauv peb hom:
- Astable
- Monostable
- Bistable
Hom astable tau siv nyob rau hauv Circuit Court no.
Khoom siv
- IC-NE555
- Resistor - 1K/0.25W (2 nos)
- Potentiometer - 10K
- Capacitor - 0.01uf, 0.1uf
- Diode-1N4148 (2nos), 1N4007 (1nos)
- Transistor - BD139 (1 nos)
- Terminal Thaiv - (2nos)
Kauj Ruam 1: Daim duab Circuit Court
Raws li kuv tau hais rau lub voj voog no ua haujlwm nyob rau hauv hom astable. Los ntawm kev sib txawv potentiometer R3 lub luag haujlwm voj voog ntawm cov zis tawm tuaj yeem hloov pauv yam tsis hloov pauv zaus. Cov mis rau xam ON lub sijhawm thiab lub sijhawm OFF rau qhov Circuit no yog:
Tuj = 0.8*R1*C2
Luas = 0.8*R3*C2
Lub sijhawm tag nrho (Ton+Toff) = 0.8 (R1+R3) C2
Zaus = 1/Lub sijhawm tag nrho
Los ntawm kev siv cov lus suav saum toj no cov zaus tso tawm ntawm qhov Circuit no yog:
Tuj+Toff = 0.8*(1+10)*0.01 = 0.088
Zaus = 1/0.088 = 11.36Khz
Yog li yog tias koj xav hloov pauv zaus koj tuaj yeem hloov tus nqi hluav taws xob (C2).
Pulse dav tes taws los piav
Pulse dav tes taws los piav PWM yog txoj hauv kev los tswj qhov nruab nrab qhov ntsuas hluav taws xob siv rau qhov thauj khoom tas li hloov nws ON thiab OFF ntawm cov haujlwm sib txawv. Ntau dua li tswj qhov ci ci ntawm lub teeb los ntawm kev ua tib zoo thov tsawg dua thiab tsawg dua qhov hluav taws xob rau nws, peb tuaj yeem tswj nws los ntawm kev hloov pauv qhov hluav taws xob tag nrho ON thiab OFF nyob rau hauv xws li txoj hauv kev uas qhov nruab nrab ON lub sijhawm tsim cov txiaj ntsig zoo ib yam li qhov sib txawv ntawm qhov muab hluav taws xob Ua tau zoo, kev tswj hluav taws xob tau siv thoob plaws lub dav hlau ntawm lub teeb yog tswj los ntawm lub luag haujlwm ntawm 555 lub zog tso tawm uas ua rau tswj qhov ci ntawm lub teeb.
Los ntawm PWM cov txheej txheem, peb tseem tuaj yeem tswj qhov nrawm ntawm DC lub cav. Kuv kuj tau sim qhov Circuit no kom them lub roj teeb 4V lead-acid thiab kuv tuaj yeem tswj hwm qhov them tam sim no kom raug. Yog li nws yog ib qho ntxiv kom zoo dua rau hauv Circuit Court no. Tab sis nco ntsoov tias qhov zaus tso tawm yog nyob hauv Kilohertz ntau.
Kauj Ruam 2: PCB Txheej Txheem
Cov txheej txheem PCB thiab cov ntaub ntawv Gerber tau muab ntawm no. Koj tuaj yeem rub nws los ntawm no.
Kauj Ruam 3: Tiav Board
Tom qab tso cov khoom sib txuas thiab muab tshuaj txhuam rau lawv, lub rooj tsavxwm tau npaj tiav. Lub potentiometer tau teeb tsa ntawm lub rooj tsavxwm nws tus kheej rau kev tuav nws yooj yim. Qhov siab tshaj plaws tam sim no ntawm cov zis transistor BD139 (Q1) yog 1.5A. Yog li yog tias koj tab tom txuas lub nra hnyav hloov lub transistor nrog qhov ntsuas tsim nyog tam sim no.
Vam tias koj txhua tus nyiam qhov Circuit no
Ua tsaug !!
Pom zoo:
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