UJT Oscillator: 3 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:25

UJT sawv rau Uni-hlws ris transistor. Kab lus no qhia koj li cas koj tuaj yeem ua daim ntawv oscillator tsuas yog ib qho transistor.

Yog xav paub ntxiv txog UJT oscillator tsim koj tuaj yeem nyem ntawm no:

www.electronics-tutorials.ws/power/unijunction-transistor.html

www.circuitstoday.com/ujt-relaxation-oscillator

www.allaboutcircuits.com/textbook/semiconductors/chpt-7/unijunction-transistor-ujt/

Khoom siv

Qhov: Uni -junction transistor (UJT), 10 kohm resistors - 3, 100 ohm resistors - 2, 470 nF hauv ncoo lub tog raj kheej, 1 Megohm kuj sib txawv resistor, insulated xov hlau.

Yeem qhov: 4.7 uF electrolytic capacitor, solder, box/encasement, daim npog qhov ncauj, pob qhov rooj, 1 kohm resistors - 2.

Cov cuab yeej: USB Oscilloscope, pliers, xaim hluav taws xob stripper, qhov puncher.

Cov cuab yeej xaiv tau: Soldering hlau, tso suab tawm suab (HiFi/khoos phis tawj), hais lus/mloog pob ntseg.

Kauj Ruam 1: Ua Circuit Court

Kuv siv lub zog tiv thaiv siab tab sis koj tuaj yeem siv lub zog tiv thaiv qis. Peb tuaj yeem xam lub zog tawm mus hla ob 100 ohm resistors thaum transistor saturation.

P = Vs * Vs / (R1 + R2)

= 9 V * 9 V / (100 ohms * 2)

= 0.405 AWG

(qhov no tsis xav tias qhov cuam tshuam rau kev thauj khoom ntawm Vo2 cov zis).

Kuv muab cov khoom sib txuas thiab cov xov hlau sib dhos ua ke. Kuv tsis tau siv cov hlau txuas rau hauv Circuit no.

Nov yog cov lus piav qhia ntawm cov xov hlau uas kuv tau siv:

1. Liab - 9 V fais fab mov.

2. Dub - Av.

3. Blue cable - 1 Meg kuj sib txawv resistor.

4. Daj thiab Dawb - Tso Tawm.

Peb qhov 10 kohm resistors tau siv rau kev tsim tawm thiab sib txawv resistor luv Circuit Court tiv thaiv. Hauv qee txoj haujlwm, qhov sib txawv resistor yog luv Circuit Court.

Kauj ruam 2: Kev nkag siab

Ib lub thawv yog lub tswv yim zoo vim tias nws yuav tiv thaiv koj lub Circuit Court los ntawm kev puas tsuaj.

Koj tuaj yeem siv lub qhov puncher lossis laum los ua lub qhov rau qhov sib txawv resistor.

Kuv txuas lub qub kua nplaum dub hau nrog daim kab xev npog (koj tuaj yeem pom hauv daim duab) tsis txhob siv lub pob qhov rooj tshaj lij.

Kauj Ruam 3: Xeem

Kuv siv USB oscilloscope los ua piv txwv cov ntaub ntawv siv los npaj cov duab uas koj pom hauv daim duab. Kuv pom tias ntawm qee txoj haujlwm ntawm qhov sib txawv resistor qhov oscillation yuav nres. Qhov no yuav tshwm sim rau qis dua qhov sib txawv resistor tau teeb tsa tus nqi siab dua.

Koj tuaj yeem sim txuas tus neeg hais lus rau qhov tso tawm vim tias lub Circuit Court muaj kev tiv thaiv luv luv. Tej zaum koj yuav pom tias lub teeb liab tso tawm ntsiag to heev. Koj yuav tsum tau txuas rau lub siab impedance load lossis txo qhov txiaj ntsig ntawm cov khoom tawm tsam. Qhov no yog vim li cas kuv tau teev tseg siv 1 kohm resistor rau cov zis. Tsis tas li, koj yuav xav tau lub tshuab hluav taws xob txhawm rau tshem tawm cov zis DC tivthaiv.

Cov zis siab dhau zaus yuav sib npaug rau:

fh = 1/(2*pi*Ro2*Co2) = 1/(2*pi*(10, 000 ohms)*(470*10^-9 F))

= 33.8627538493 Hz

Yog li koj tuaj yeem siv 470 nF capacitor rau Co2.

Xam Co1 capacitor dhau ntawm cov kab lus ntawm kab lus no vim tias ob qho Co1 thiab Ro1 qhov tseem ceeb yuav cuam tshuam rau qhov oscillating zaus ntawm lub zog tiv taus qis dua 10 Megohms.