LED Tester Nrog Kho Tam Sim No: 8 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:31

Qhov no yog qhov yooj yim los tsim cov ntsuas LED nrog ntau qhov muaj txiaj ntsig zoo.- Kho tau tam sim no ntawm 1 mA txog 20 mA- Txheeb xyuas qhov ci ci thiab ua tau zoo- Vf (rau pem hauv ntej qhov hluav taws xob poob) kev ntsuas- Xav tau los xam tus nqi tiv thaiv- LED yuav tsis puas yog txuas nrog rov qab - Qhov hluav taws xob tau txwv rau 5 volts- Lub zog qhib / qhib Circuit / rov qab qhia qhov tseeb - qhia qhov tsis zoo lossis kev txuas tsis raug

Kauj Ruam 1: Tshooj thiab Schematic

Qhov yuav tsum tau: 47 ohm resistor100 ohm resistor1 K ohm resistor1.5 K ohm resistor2N4401 lossis zoo sib xws (2N3904, 2N2222) NPN transistorThree 1N4148 diodesTree liab LEDs (yuav tsum yog liab) 5 K ohm log taper potSwitchTransistor socket or similarTwo txiv tsawb jacks lauj kaub)

Kauj Ruam 2: Kev Siv Hluav Taws Xob

Solder peb 1N4148 diodes 1K resistor ua ke raws li qhia.

Kauj Ruam 3: Kho Tam Sim No

Solder 47 ohm thiab 1.5 K ohm resistor rau diode raws li qhia. Tsis txhob txiav ib qho ntawm cov coj. Muag lub 1.5 K ohm resistor mus rau lub davhlau ya nyob twg sab laug ntawm 5 K lauj kaub. Muag lub qhov sib txuas ntawm 1 K ohm resistor thiab diode rau sab xis ntawm 5 K lauj kaub.

Kauj Ruam 4: Tam Sim No

Siv lub hauv paus ntawm cov transistor mus rau qhov chaw nruab nrab ntawm 5 K lub lauj kaub.

Kauj Ruam 5: Qhib Circuit Indicator

Cov laug ua ke 3 liab LEDs raws li qhia. Cov anode ntawm ib qho txuas rau cathode ntawm lwm tus. Muag cov khoom tsis zoo (dub) xaim ntawm lub roj teeb txuas mus rau qhov sib txuas ntawm 47 ohm resistor, 1 K ohm resistor, thiab diode. Muaj qhov txuas txuas ib ntus los ntawm tus sau ntawm transistor mus rau cathode ntawm LEDs Ua ib qho txuas txuas ib ntus los ntawm 1 K ohm resistor mus rau anode ntawm LEDs thiab qhov zoo (liab) roj teeb clip hlau txuas. 9 lub roj teeb thiab tig 5 K lauj kaub los ntawm CCW rau CW. Cov LEDs yuav tsum tawm ntawm qhov ci tshaj plaws. Kev ntsuas qhov hluav taws xob sab laug thiab sab xis ntawm 5 K lauj kaub. Kev nyeem ntawv yuav tsum yog kwv yees li 450 mV sab laug, thiab 2.1 V txoj cai.

Kauj Ruam 6: Cov ntaub ntawv kaw

Laum qhov rau 5 K lub lauj kaub, lub qhov (socket), thiab LED. Lub nruab cov khoom sib txuas thiab xaim cov LEDs thiab lub qhov (socket) Muag qee cov xaim mus rau lub txiv tsawb jack lub dav hlau txuas thiab los ntawm ib qho ntawm lub davhlau ya nyob twg mus rau qhov hloov. Solder qhov zoo (liab) xaim los ntawm lub roj teeb txuas mus rau qhov hloov. Lub qhov rau qhov hloov pauv thiab txiv tsawb jack. Txuas lub xaim los ntawm cov txiv tsawb dub rau tus sau ntawm lub transistor. Txuas cov xaim los ntawm cov txiv tsawb liab liab rau qhov sib tshuam ntawm 1 K resistor thiab LEDs.

Kauj ruam 7: Calibration

Muab 100 ohm resistor hauv lub qhov (socket) LED thiab txuas lub ntsuas hluav taws xob mus rau lub txiv tsawb. Kev nyeem qhov ntsuas hluav taws xob yuav qhia txog qhov tam sim no ntws los ntawm tus tiv thaiv. Qhov 1/2/5 ntu… 0.1 V = 1 mA0.2 V = 2 mA0.5 V = 5 mA1.0 V = 10 mA2.0 V = 20 mA

Kauj ruam 8: Siv

Qhib nws thiab tso lub LED tso rau hauv lub qhov (socket). Yog tias lub teeb liab liab qhib, thim rov qab lub LED hauv lub qhov (socket) Ib lub ntsuas tuaj yeem txuas nrog lub txiv tsawb txhawm rau ntsuas qhov ntsuas hluav taws xob poob qis ntawm LED (Vf). Vf txawv rau ntau yam xim LED thiab cov khoom siv los ua nws.. With 20 mA ntawm tam sim no… Liab feem ntau yog 1.9 txog 2.0 VYellow / txiv kab ntxwv feem ntau yog 2.0 txog 2.1 VGreen tuaj yeem yog 2.2 V lossis 3.0 V (muaj tseeb-ntsuab lossis ntsuab-ntsuab) Xiav thiab Dawb feem ntau yog 3.0 txog 3.5 V-muaj ntau txoj hauv kev los ua cov. I. I no feem ntau yog 1.0 txog 1.2 V - Yog tias lub teeb taws tsis ci thiab lub ntsuas ntsuas nyeem 1.0 txog 1.5 V, nws yog qhov IR. Lub ntsej muag mount LED tuaj yeem kuaj nrog cov txuas nrog cov txiv tsawb - lawv nyob ua ke nrog qhov ntsuas qhov ntsuas.