0.01 MA ~ 3 Amp C.C LED Tsav Tsheb: 9 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:29

Raws li peb txhua tus paub tias LED qhov muag tau nkag siab rau qhov hluav taws xob Nws xav tau ib qho C. V / C. C zoo, Hauv Cov Ntawv Tshaj Tawm no kuv yuav los qhia qhov Precision C. C Led Tsav Circuit Court uas tuaj yeem muab 0.01mA ~ 3 Amp.

Kauj Ruam 1: Shunt / Low Resistance Resistor

Hauv qhov Project SHUNT resistor no tau siv los ntsuas qhov ntws tam sim no. Nws Tus Nqi Los Ntawm 1Ohm ~ 2.2Ohm 1% kom raug qhov tseeb.

Kauj ruam 2: OpAmp

OpAmp siv hauv txoj haujlwm no los sib piv 2 qib hluav taws xob, (Teeb Voltage Thiab Voltage tsim los ntawm shunt thaum tam sim no ntws). tom qab ntawd nws tuaj yeem hloov mosfet. Hauv Circuit no kuv tau siv LM358 OpAmp koj tuaj yeem siv Tsawg offset precision OpAmp.

Kauj ruam 3: TL431

TL431 (Programmable Zener) siv hauv txoj haujlwm no los muab Kev Ntsuas Xyuas Qhov Siab Tshaj rau OpAmp, Qhov no tuaj yeem pom hauv ib qho yuam kev SMPS.

Kauj ruam 4: Precision 1% Resistor

Koj tuaj yeem siv 5% Tolerance resistors tab sis 1% Yuav muab cov txiaj ntsig zoo rau koj.

Kauj ruam 5: Mosfet

Koj muaj kev ywj pheej siv ib qho N-Channel Mosfet (IRFZ44N). Peb siv Ohmic Cheeb Tsam ntawm mosfet Muab Cov Hloov Pauv Tam Sim No.

Kauj ruam 6: Clip

Clips tau siv los yooj yim txuas ntau yam Loads.

Kauj Ruam 7: Schematic Daim Duab / Ua Haujlwm

Sib sau tag nrho cov khoom siv raws li daim duab qhia chaw.

Ua hauj lwm

Txuas P1 Thiab P2 rau koj lub zog siv.

• C1 yog siv los lim cov khoom siv hluav taws xob.
• R3 yog siv los txwv tam sim no rau TL431.
• R1 (POT) tau siv los teeb tsa qhov ntsuas hluav taws xob rau TL431.
• C2, C3 tau siv los lim txhua yam suab nrov.
• U2 (OPAMP) tau siv ua qhov tsis zoo (tsis tuaj yeem xaiv qhov no) koj tuaj yeem txuas ncaj qha tus pin 3 ntawm TL431 rau 100K lauj kaub (R2). Tsis txhim kho kev ruaj ntseg.
• R2 (100K) tau siv los ua qhov sib txawv ntawm qhov sib faib hluav taws xob, los ntawm kev siv R2 peb teeb tsa qhov ntsuas hluav taws xob ntawm qhov tsis hloov pauv ntawm U1.
• U1 yog siv los sib piv, peb teeb tsa qhov ntsuas hluav taws xob ntawm qhov tsis hloov pauv, thaum qhov hluav taws xob ntawm qhov taw tes hloov pauv tsawg dua qhov tsis hloov pauv. tshaj cov zis siab. Hauv qhov no mosfet pib ua dua li qhov poob qis tshwm sim ntawm R5.
• Thaum qhov hluav taws xob poob ntau dua li qhov ntsuas hluav taws xob tshaj qhov tso tawm yuav rub tawm, nws ua rau mosfet nyob rau hauv lub xeev qhov kev hloov pauv no rov ua dua & dua.
• Yog li cov zis tam sim no sib npaug rau qhov siv hluav taws xob.

Kauj ruam 8: Txhua yam ua tiav

Tam sim no Peb txoj haujlwm tau npaj los tshuaj xyuas thiab siv rau lawv txoj haujlwm.

Kauj ruam 9: Txaus siab rau nws

Koj tseem tuaj yeem tshawb xyuas nws ntawm kuv tus youtube channel Channel

Ua koj tus kheej & cia mw ceeb toom hauv kab lus hauv qab no, UA TSAUG