Cov txheej txheem:

LED Blinker thiab PWM Oscillator Siv 555 Timer: 3 Kauj Ruam
LED Blinker thiab PWM Oscillator Siv 555 Timer: 3 Kauj Ruam

Video: LED Blinker thiab PWM Oscillator Siv 555 Timer: 3 Kauj Ruam

Video: LED Blinker thiab PWM Oscillator Siv 555 Timer: 3 Kauj Ruam
Video: Varying brightness of LED using PWM on Rpi 2024, Kaum ib hlis
Anonim
LED Blinker thiab PWM Oscillator Siv 555 Timer
LED Blinker thiab PWM Oscillator Siv 555 Timer

Txhua tus neeg tau pib ua hluav taws xob thiab rau cov pib tshiab qee zaum nws yuav nyuaj rau tsim qee qhov kev ua haujlwm. Tias yog vim li cas kuv txiav txim siab tshaj tawm qhov haujlwm zoo li no. Qhov kev sib tw no tau hloov pauv yooj yim ntawm cov kab hluav taws xob yooj yim uas cov lej ntawm nws tau muab los ntawm cov chaw tsim khoom ntawm 555 timer. Txawm tias qhov nyuaj hauv Circuit Court no yooj yim koj tsis ntseeg qhov kev txaus siab thaum nws ua haujlwm! Lub voj voog no tsis muaj txiaj ntsig ib leeg tab sis nws tuaj yeem ua tiav lub luag haujlwm tseem ceeb piv txwv li PWM tus tsav tsheb, Lub tshuab hluav taws xob Square, lub moos teeb liab thiab lwm yam hauv cov kab hluav taws xob nyuaj! Yog li cia pib!

Kauj Ruam 1: Cheeb Tsam/Cov Cuab Yeej Xav Tau

1x NE555 (lossis ib yam ntawm 555 timer).

1x Sijhawm Capacitor. Cov txheej txheem suav ntawm tus nqi yuav piav qhia tom qab. Hauv kuv qhov xwm txheej kuv siv 10 uF electrolytic rau LED ntsais, 100 nF ceramic rau siv nws ua oscillator.

1x Bypass capacitor ntawm koj xaiv. Nws yog nyob ntawm yeem tab sis nws tau pom zoo tias koj siv nws. Hauv kuv qhov xwm txheej kuv siv 100 nF ceramic capacitor thiab nws ua haujlwm tau zoo.

2x Sijhawm resistors. Koj tuaj yeem siv tib lub hwj chim lossis lub trimpot tsis siv 2 resistors.

1 x 220 Ohm Resistor. Qhov no yuav siv rau tam sim no txwv rau LED. koj tuaj yeem xam tus nqi tiv thaiv koj tus kheej tab sis 220 ohm yuav zoo rau feem ntau.

1 x LED. LED ntawm koj nyiam xim

1x Breadboard rau prototyping ntawm nws.

Qee cov xov hlau los txuas cov khoom siv ntawm lub khob cij.

Lub hwj chim los yog roj teeb los txhawb koj lub Circuit.

Kauj Ruam 2: Kev suav thiab sib dhos

Xam thiab Los Ua Ke
Xam thiab Los Ua Ke

Cov txheej txheem hluav taws xob tau muab rau hauv daim duab. Cov mis rau zaus tso zis yog:

1.44/(R1+2R2). C = f

Hauv cov mis no f sawv rau zaus, C sawv cev rau lub sijhawm ntsuas hluav taws xob, R1 sawv rau lub sijhawm tiv thaiv 1, R2 sawv rau lub sijhawm tiv thaiv 2.

Cov qauv rau kev tso tawm lub voj voog ua haujlwm lub luag haujlwm yog:

1- (R2/R1+2R2) = Lub voj voog ua haujlwm

Koj tuaj yeem suav qhov tseem ceeb ntawm lub capacitor thiab resistors nrog cov qauv no raws li koj xav tau. Tsis txhob hnov qab tias yog tias koj siv lub lauj kaub nws cov txiaj ntsig yuav yog tag nrho kev tawm tsam, tsis yog ib leeg tiv thaiv! C2 ntawm cov txheej txheem yog hla lub tshuab hluav taws xob yog li nws tsis tsim nyog. Yog tias koj muaj teeb meem txog kev sib txuas lus thov tawm tswv yim.

Kauj ruam 3: Muaj kev lom zem

Tam sim no qhov zoo tshaj plaws! Ua si nrog nws! Yog tias koj xav siv nws nrog lub zog ua haujlwm siab koj tuaj yeem siv qhov Circuit Court no nrog transistor lossis MOSFET. yam no muaj ntau yam uas koj tuaj yeem tsim lub tshuab hluav taws xob ua haujlwm nrog qhov no! qhov Circuit no tuaj yeem siv ua lub logic Circuit clock, oscillator, pwm generator thiab lwm yam. Yog tias koj muaj teeb meem nrog qhov kev tsim no tawm hauv kev tawm tswv yim. Kuv vam tias koj nyiam cov lus qhia no, yog li thov koj xav qhia qhov qhia no los pab kuv. Nyob twj ywm rau txoj haujlwm tom ntej: Ib qho yooj yim FM RF Transmitter!

Pom zoo: