555 Kho TIMER (Ntu-1): 4 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:27

Hlo Folks!

Kawm paub yuav ua li cas thiaj tuaj yeem kho lub sijhawm nrog qhov hloov pauv qeeb los ntawm 1 - 100 vib nas this uas siv 555 IC. Lub 555 timer tau teeb tsa ua Monostable Multivibrator.

Daim duab saum toj no qhia txog Daim Ntawv Schematic ntawm 555 kho lub sijhawm. 555 yog lub cuab yeej ruaj khov zam lub sijhawm ncua lossis qeeb. Lub davhlau ya nyob twg ntxiv tau muab rau kev ua lossis rov pib dua yog tias xav tau. Hauv lub sijhawm ncua sijhawm ntawm kev ua haujlwm, lub sijhawm tau tswj hwm los ntawm ib tus tiv thaiv sab nraud thiab lub tshuab hluav taws xob. Lub Circuit Court tuaj yeem tshwm sim thiab rov pib dua ntawm cov nthwv dej poob qis, thiab cov zis tawm hauv Circuit tuaj yeem ua rau lossis poob mus txog 200mA lossis tsav TTL Circuit.

Hauv Monostable hom, LM555 lub sijhawm ua haujlwm ua lub tshuab hluav taws xob txhaj tshuaj ib zaug. Cov mem tes ua thaum lub LM555 lub sijhawm tau txais lub teeb liab ntawm qhov ntsuas tawm uas poob qis dua li 1/3 ntawm qhov hluav taws xob. Qhov dav ntawm cov zis mem tes tau txiav txim siab los ntawm lub sijhawm tas li ntawm RC network. Cov mem tes tso tawm xaus thaum qhov hluav taws xob ntawm lub capacitor sib npaug 2/3 ntawm qhov muab hluav taws xob. Qhov dav mem tes dav tuaj yeem txuas ntxiv lossis luv dua nyob ntawm daim ntawv thov los ntawm kev kho R thiab C qhov tseem ceeb.

Kauj Ruam 1: Yuav Tsum Kho Vajtse

Cov hauv qab no tau siv:

1. X1 IC 555 timer

2. X2 3KΩ Resistor

3. X4 10KΩ Resistor

4. X1 1MΩ Potentiometer

5. X2 IN4004 Diode

6. X2 Tactile Momentary Push Button

7. X1 SPDT Swb Hloov

8. X2 100uF Capacitor

9. X2 0.1uF (100nF) Capacitor

10. X1 2 Pin Ntsia Hlau Terminal

11. X1 3 Pin Ntsia Hlau Terminal

12. X1 12VDC Relay

13. X1 12VDC Adapter

14. X1 5mm LED

Kauj Ruam 2: Circuit Schematic & Ua Haujlwm

Daim duab saum toj no qhia txog cov xwm txheej hauv Circuit Court ntawm 555 kho lub sijhawm. LM555 muaj qhov ntsuas hluav taws xob siab tshaj plaws ntawm 16V thaum lub zog txuas lub tshuab hluav taws xob txuas ntawm 12V. Vim li no 12V lub zog siv hluav taws xob tau siv los txo tus naj npawb ntawm cov khoom siv xws li cov ntsuas hluav taws xob tawm. Thaum tus pin 2 ntawm LM555 tau tshwm sim (los ntawm luv nws mus rau hauv av) los ntawm kev hloov pauv tam sim S1, lub timer tau pib.

Lub sijhawm ua haujlwm tsim tawm cov mem tes nrog lub sijhawm ON lub sijhawm txiav txim los ntawm RC network piv txwv li t = 1.1RC. Hauv qhov no, tus nqi ruaj khov ntawm lub capacitor yog 100uF. Tus nqi ntawm R suav nrog 10KΩ resistor hauv koob nrog 1MΩ potentiometer. Peb tuaj yeem hloov pauv lub hwj chim kom hloov pauv lub sij hawm ntawm cov zis mem tes.

Piv txwv li, yog hais tias tus potentiometer tau teeb tsa rau 0Ω, tus nqi R yog sib npaug rau 10KΩ. Li no t = 1.1 x 10K x 100u = 1 thib ob.

Tab sis yog tias lub lauj kaub tau teeb tsa rau 1MΩ, tus nqi R yog sib npaug rau 1MΩ + 10KΩ = 1010KΩ. Li no t = 1.1 x 1010K x 100u = 100 vib nas this.

Thaum tus pin 4 ntawm LM555 tau tshwm sim (los ntawm luv nws mus rau hauv av) los ntawm qhov hloov pauv tam sim S2, lub sijhawm tau rov pib dua.

Thaum lub timer pib, lub relay tig ON. Vim li no qhov sib xws (COM) davhlau ya nyob twg ntawm kev xa xov yog luv rau qhov Qhib Qhib (TSIS) Lub zog muaj zog tuaj yeem txuas nrog lub davhlau ya nyob twg xws li lub teeb lossis lub twj tso kua dej. Lub transistor Q1 ua raws li kev hloov pauv kom ntseeg tau tias lub zog tsav tam sim no tau muab rau kev xa tawm. Diode D1 ua raws li flyback diode uas tiv thaiv transistor Q1 los ntawm qhov ntsuas hluav taws xob tshwm sim los ntawm kev xa xov txuas.

LED2 tig los txhawm rau qhia tias thaum twg lub relay tau qhib. LED1 qhia tias lub Circuit Court tau qhib. SPDT hloov S3 yog siv los hloov lub Circuit Court ON. Capacitors C2 thiab C4 tau siv los lim lub suab nrov hauv kab khoom.

Kauj Ruam 3: PCB Tsim

Daim duab qhia pom Circuit Court PCB Tsim ntawm 555 kho lub sijhawm siv Eagle software.

Parameter txiav txim siab rau PCB tsim:

1. Kab dav tuab yog yam tsawg 8 mil.

2. Qhov sib txawv ntawm lub dav hlau tooj liab thiab tooj liab yog qhov tsawg kawg yog 8 lab.

3. Qhov sib txawv nruab nrab ntawm txoj kab rau kab laum yog yam tsawg kawg ntawm 8 mil.

4. Qhov me me qhov loj me yog 0.4 hli

5. Txhua txoj kab uas muaj txoj hauv kev tam sim no xav tau cov kab tuab.

Kauj Ruam 4: Kev Tsim PCB

Koj tuaj yeem kos PCB Schematic nrog ib qho software raws li koj qhov yooj yim. Nov kuv muaj kuv tus kheej tsim thiab cov ntaub ntawv Gerber. Tom qab koj tsim cov ntaub ntawv Gerber koj tuaj yeem xa nws mus rau cov chaw tsim khoom. Kuv tus kheej pom zoo LionCircuits.

Kuv upload kuv cov ntaub ntawv Gerber ntawm lawv lub platform online thiab tau txais cov lus hais tam sim los tso kev xaj online. Lawv them tus nqi tsawg rau tus qauv thiab kuv tau txais kuv cov PCBs hauv tsuas yog 6 hnub.

Nyob twj ywm hais mav! Kuv yuav tshaj tawm ntu thib ob ntawm cov lus qhia no thaum kuv tau txais kuv cov laug cam.