Kev Ua Haujlwm Zoo 9-volt LED Teeb nrog Kov Tswj: 4 Cov Kauj Ruam

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

Siv tsuas yog 10 ntu ntawm lub txee, qhov yooj yim hloov pauv hluav taws xob los ntawm 9-volt roj teeb kom khiav 2 dawb LEDs ntawm 20mA, thaum tsuas yog siv 13mA ntawm lub roj teeb-uas yog ntau dua 90% muaj txiaj ntsig!

Kauj Ruam 1: Yam Koj Xav Tau:

2 x Dawb lossis xiav LEDs (25mA lossis zoo dua) 1 x Silicon diode (xaiv schottky zoo li 1N5819 rau kev ua tau zoo dua) 1 x BC327-25 lossis MPS751 PNP transistor (Tsis txhob hloov) 1 x BC337-25, MPS651, 2N4401 lossis PN2222/MPS2222 NPN Transistor (Tsis txhob hloov) 1 x 220uH coil inductor (saib cov ntawv) 1 x 10uF 10-volt (lossis zoo dua) capacitor.1 x 1000pF (1nF, 102) capacitor.1 x 10k resistor1 x 1M resistor9-volt roj teeb thiab kho vajtse. Qhov feem ntau ntawm cov khoom no muaj nyob ntawm AllElectronics Surplus thiab ntawm eBay, ntawm no thiab ntawm no Yog tias koj xav sim, koj tuaj yeem sim thiab ua koj tus kheej lub kauj los ntawm kev pib nrog 15 tig ntawm lub toroid. Yog tias lub voj voos nyob ntawm nws tus kheej, ntxiv ntau ntxiv; yog tias LEDs dim, REMOVE tig.

Kauj ruam 2: Sib dhos

Nrog tsuas yog 10 ntu, kev tso kawm yog qhov yooj yim heev. Thawj daim duab hauv qab no qhia tias kuv tau npaj cov khoom li cas. Cov duab tom ntej no qhia txog cov kab hluav taws xob nyob hauv qab. Daim duab thib peb yog 2 daim duab ua ke ua ke.

Kauj Ruam 3: Nws Ua Haujlwm Li Cas

Qhov ua tau zoo ntawm cov Circuit no los ntawm cov kauj (inductor) thiab qhov me me 1000pF capacitor. NCO TSEG: Lub 1000pF capacitor yog qhov tseem ceeb rau hauv Circuit Court! Tsis txhob hloov nws tus nqi thiab tsis tas li, tsis txhob tso tseg! Lub Circuit Court pib ua haujlwm thaum ya raws los ntawm koj tus ntiv tes tig transistor Q1 rau, uas hloov Q2. Tam sim no los ntawm lub roj teeb tau kos los ntawm 2 LEDs, lub kauj, dhau Q2 thiab rau hauv av. Txij li 2 LEDs tsuas yog xav tau 6.5v kom pom kev, lub kauj teeb tsa nws cov nqi nrog ntau dua (9 - 6.5 =) 2.5 -volts. Capacitor C txiav tawm cov transistors thaum lub kauj saturates thiab nws cov teb sib nqus. Cov khoom siv hluav taws xob uas ntws los ntawm lub diode kom cov LEDs ci. Qhov oscilloscope taug qab qhia pom tias qhov kev rov ua dua li cas, yuav luag li 1/4-MILLION zaug ib pliag! Raws li qhov tshwm sim, lub zog tsuas yog kos los ntawm roj teeb txog 1/ 2 lub sijhawm, thaum lub kauj 'recycles' lub zog ntau dua lwm lub sijhawm. Yog li cov LEDs tuav lub ci ci tag nrho yam tsis muaj roj teeb txuas ntxiv.

Kauj ruam 4: Xaus

Qhov no yog ib qho piv txwv yooj yim heev ntawm kev hloov pauv Circuit Court. Unlike series cov tswj hwm (zoo li 7805 thiab LM317), uas hlawv hluav taws xob ntxiv thaum tshav kub kub, cov khoom siv hluav taws xob no khaws ntau lub zog hauv cov kauj, kom rov ua haujlwm ib ntus, ua kom lub roj teeb ntau dua Kuv vam tias koj yuav sim thiab tsim ib qho - raws li 'ntsuab' raws li LEDs, lawv cov kev ua tau zoo tseem tuaj yeem txhim kho los ntawm kev txwv lub zog pov tseg hauv cov neeg tawm tsam thiab cov tswj hwm series. lub vev xaib