Ua Cov Khoom Txias Txias Los Ntawm Kev Tuag Teeb Lub Teeb: 8 Kauj Ruam

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

Koj puas muaj qee cov teeb roj fluorescent tuag? Yog tias yog, tom qab ntawv koj tseem tuaj yeem siv qee yam ntawm nws lub siab los zam qee qhov yooj yim tab sis siv tau.

Kauj Ruam 1: Tsheb rau Portable MP3 Player Power Supply

Thawj lub cuab yeej yog 12 V rau 1.8 V fais fab mov, tseem hu ua nqis nqis lossis buck dc-dc hloov pauv. Hom SMPS no (Hloov Lub Hwj Huam Lub Hwj Huam) ua tau zoo heev nyob rau hauv cov nqe lus ntawm lub zog poob los ntawm cov cua sov sib kis piv rau cov kab tawm (cov kab zoo li 7805, 7509, LM317, thiab lwm yam). Qhov no ua haujlwm raws li lub hauv paus ntawm kev khaws lub zog hauv thaj chaw sib nqus thiab tom qab ntawd tsuas yog tswj cov hluav taws xob tso tawm los ntawm txoj haujlwm ntawm kev tswj lub voj voog ntawm PWM (Pulse Width Modulation).

Qhib koj lub teeb thiab nrhiav lub me me ferrite transformer (qee lub npe yuav muaj ob qho, yog li sim sib txawv hom lossis ntau thiab tsawg)

Kauj Ruam 2: MP3 PSU: Cov Khoom Koj Yuav Tsum Tau

Nov yog yam koj yuav xav tau:

-NE 555 (Timmer- oscillator IC) -ob 1N4001 lossis 1N4148 diodes lossis ib yam zoo sib xws (rau qhov tsawg zaus) -10k trimpot lossis potencimeter -100n ceramic lossis polyester capacitor -10n ceramic lossis polyester capacitor -1000u X 25 V polarized capacitor -Yog N -Channel txhim kho hom Mosfet rau 5 A lossis ntau dua tam sim no -470 Ohm resistor -A Schotsky diode (Qhov no yog yam khoom tseem ceeb tshaj plaws, txij li yuav tsum yog diode uas tuaj yeem hloov pauv ntawm qhov ntau zaus, yog li "rov qab sai" tag) Kuv tau txais qhov no los ntawm kev tuag laptop lub zog hloov pauv. Lawv muaj ntau heev. -FROM KOJ LAMP, tshem tawm xtransformed thiab yog tias nws tseem nyob hauv goog zoo, siv nws. Yog tias tsis yog, koj tseem tuaj yeem siv cov tub ntxhais thiab rov qab qee qhov 200 tig ntawm cov hlau nplaum hlau (30 lossis 32 AWG). Inductance ntawm cov kauj no yuav tsum yog hauv mH ntau.

Kauj ruam 3: Schematic

Qhov no yog schematic. 555 tsav Mosfet thiab nws pulses tam sim no hla tus inductor L thiab lub nra. Thaum Mosfet raug tua, lub zog sib nqus sib tsoo thiab qhov hluav taws xob nrog qhov sib txawv ntawm qhov sib txawv tshwm ntawm L lub dav hlau, yog li Schotsky diode ua lub zog no nyob rau hauv daim ntawv ntawm tam sim no rau lub nra, tab sis ntawm lub nraub qaum polarity tseem tsis hloov pauv. Cov txiaj ntsig tau yog qhov no: Voutput = Vinput/Duty Cycle. Vim tias lub zog poob zoo li 15-20% koj tsuas yog xav tau lub dab dej me me rau mosfet. Ntseeg kuv, Kuv muaj ib txoj kab hloov pauv siv LM317, thiab nws tau kub heev, txawm tias nws muaj cua sov loj.

Kauj Ruam 4: Xaus Qhov Tseeb

Nov yog kuv qhov version ntawm Circuit Court.

Kauj Ruam 5: Kho Koj Cov Hluav Taws Xob Tawm

Tam sim no, txuas NiCd rau koj lub dc-dc hloov pauv thiab kho nws kom tso zis 1.5 rau 1.8 volts. Tom qab ntawd teeb tsa koj lub MP3 thiab kho kom zoo kom tau txais lub roj teeb puv. Lub voj voog no yuav tuaj yeem them koj lub roj teeb MP3 thiab tib lub sijhawm txhawb koj li MP3.

Kauj Ruam 6: Joule Thief

Qhov no yog lub voj voos uas ua qhov kev tawm tsam rau Buck hloov pauv, nws "txhawb nqa" qhov hluav taws xob, yog li nws hu rau Boost converter.

Lub voj voog no tau paub txog nws lub npe "Joule Thief". Qhov no tsuas yog tus kheej oscillating Boost DC-DC hloov pauv. Siv cov tub ntxhais toroidal ferrite pom ntawm qee lub teeb flourescent, koj tuaj yeem cua tshuab hloov pauv uas xav tau rau lub cuab yeej no. Nov yog qhov koj yuav xav tau: -Txhua yam teeb liab me me NPN lossis PNP (bipolar transistor) zoo li BC548. -1k resistor -A 1.5 V roj teeb -A coj. -Cov toroid los ntawm koj lub teeb. -1 meter ntev daim hlau nplaum hlau.

Kauj ruam 7: Winding

Tam sim no khoov koj cov hlau nplaum ib nrab thiab cua nws ncig koj lub toroid. Cut qhov kawg thiab siv Ohmmeter, txheeb xyuas qhov xaus ntawm L1 thiab L2. Solder qhov kawg ntawm L1 rau begginig ntawm L2. Yog li polarity ntawm L1 thiab L2 yog qhov sib thooj. (yog xav paub ntau ntxiv mus rau cov kab ntawv txuas no: https://www.evilmadscientist.com/article.php/joulethief) Nov yog qhov nws ua haujlwm li cas: Thaum lub transistor ua, tam sim no ntws mus txog L1 thiab lub LED tawm (daim duab a). Qhov no tsim qhov chaw sib nqus ntawm lub kauj thiab ua rau L2 kaw lub transistor. Thaum qhov no tshwm sim (daim duab b), lub zog ntawm qhov chaw sib nqus ua rau muaj qhov hluav taws xob ntawm lub kauj hu ua "rov qab emf" thiab qhov ADDS nrog lub roj teeb yog li koj muaj 3 V lossis ntau dua (nws zoo li ntxiv roj teeb hauv koob). lub voj voog no tshwm sim ntawm qhov ntau zaus (kHz, nyob ntawm koj tus inductor thiab transistor, thiab lwm yam), LED zoo li txhua lub sijhawm ON.

Kauj Ruam 8: Qhov Kawg

Nov yog qhov kuv tsuas yog siv nws rau lub roj teeb Alkaline.