Lub Suab Qib Siab Los Ntawm Kev Ua Kom Zoo VFD: 7 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

VFD - Lub Tshuab Nqus Tsev Fluorescent Qhia, yam ntawm Dinosaur ntawm Kev Siv Tshuab, tseem zoo nkauj thiab txias, tuaj yeem pom nyob rau ntau qhov qub thiab tsis quav ntsej cov khoom siv hluav taws xob hauv tsev. Yog li peb yuav pov tseg lawv li cas? Noooo peb tseem tuaj yeem siv lawv. Nws raug nqi me ntsis tab sis qhov tsim nyog nws.

Kauj Ruam 1: Paub Paub Cov Zaub

VFD muaj 3 ntu tseem ceeb

Filament (xiav)

Rooj vag (ntsuab)

- Cov phaj (daj) txheej hauv phosphor uas ci thaum raug hluav taws xob.

Cov hluav taws xob mus los ntawm cov kab hluav taws xob mus rau cov phaj, hla lub rooj vag. Txhawm rau kom qhov no tshwm sim, phaj yuav tsum yog li 12 txog 50V zoo dua tom qab ntawd cov ntsiab lus (cov hluav taws xob tsis zoo raug rub mus rau qhov zoo). Cov rooj vag yuav tso cai rau cov hluav taws xob ya mus thaum lawv qhov hluav taws xob nyob ze rau ntawm cov paib. Txwv tsis pub, thaum lub rooj vag muaj qhov qis lossis qhov tsis zoo, cov hluav taws xob tau raug tshem tawm thiab tsis ncav cuag cov phaj, ua rau tsis pom kev.

Thaum saib ze rau ntawm cov zaub koj yuav pom tias lub rooj vag (cov phaj hlau raug ntaus) npog ntau daim phiaj (cov khoom tso tom qab), yog li ib lub rooj vag toggles cov lej ntawm cov khoom. Ib cov xov tooj tseem txuas nrog ua ke ntawm ib tus pin. Qhov no ua rau muaj qhov sib txawv, uas yuav tsum tau khiav hauv txoj kev sib txawv. Koj hloov pauv ntawm ib lub rooj vag ntawm ib lub sijhawm thiab tseem qhib cov phiaj uas yuav tsum ci nyob hauv qab lub qhov rooj no, tom qab ntawd tig lub qhov rooj tom ntej thiab qee lwm daim hlau.

Txhawm rau ntsuas Cov Zaub koj tuaj yeem nrhiav cov paum filament - feem ntau yog sab nraud - thiab thov txog 3V rau nws, siv 2 AA roj teeb. Tsis txhob siv qhov hluav taws xob siab dua qhov no tuaj yeem tshuab cov xov hluav taws xob zoo. Tom qab ntawd cov xov hlau tau pom zoo li cov kab liab ci ci, koj tau siv ntau qhov hluav taws xob!

Tom qab ntawd thov 9/12/18V (2x 9V roj teeb) rau lub qhov rooj thiab phaj (tsuas yog saib mus rau hauv cov zaub uas cov pins rau cov rooj vag hlau yog) qhov no yuav tsum teeb ib qho khoom tso rau qhov twg.

Hauv cov duab kuv yooj yim txuas (yuav luag) txhua lub rooj vag thiab anodes rau 12V qhov no tig rau txhua yam.

Siv qee qhov kev ceeb toom txog tus pin teeb li cas uas pom ntu! Qhov no yuav xav tau rau kev txuas thiab teeb tsa cov duab.

Kauj Ruam 2: Sib tw 1: HighVoltage

Raws li peb tau pom hauv Theory, Cov Phaj/Rooj Vev Xaib xav tau Voltage ntawm 12 txog 50 Volt kom txaus nyiam rau Electrons thiab tau txais lub teeb pom kev zoo ntawm phosphor. Hauv Cov Khoom Siv Hluav Taws Xob cov hluav taws xob no feem ntau yog siv los ntawm ib qho ntxiv ntawm lub tshuab hluav taws xob tseem ceeb. Raws li tus txiv neej DIY koj tsis muaj kev hloov pauv nrog tabs ntxiv thiab koj nyiam yooj yim 5V USB khoom siv ib qho ntxiv:)

Tom qab ntawd khiav cov lej sib npaug peb xav tau ntau qhov hluav taws xob thaum ~ 12V los ntawm peb qhov kev sim, vim hais tias cov ntu ntu tau teeb tsa tsuas yog ib qho tom qab lwm qhov, ua rau muaj kev cuam tshuam me me (PWM style nrog qhov piv 1: NumberOfGates). Yog li peb yuav tsum tsom rau 50V.

Muaj cov xov tooj cua los txhawb qhov hluav taws xob los ntawm qis li 5V txog 30V..50V, tab sis feem ntau xa tsuas yog lub zog me me, zoo li ob peb mA@50V rau tus tsav tsheb kuv qhia hauv cov kauj ruam tom ntej, uas siv cov rub tawm, qhov no tsis txaus. Kuv tau xaus siv ib qho ntawm cheep Voltage booster circuits koj tuaj yeem pom ntawm Amazon lossis eBay (tshawb rau "XL6009"), nws hloov 5V rau ~ 35V nrog qhov siab tam sim no, uas yog qhov zoo txaus.

Cov khoom siv XL6009 no tuaj yeem ua pimped rau cov zis ~ 50V los ntawm kev hloov tus tiv thaiv. Tus tiv thaiv tau cim rau hauv cov duab nrog tus xub liab. Koj tseem tuaj yeem tshawb nrhiav cov ntaub ntawv ntawm XL6009, uas muaj cov ntaub ntawv tsim nyog los laij tawm qhov hluav taws xob.

Kauj Ruam 3: Kev Sib Tw 2: Tau Txais Cov Khoom Siv Hluav Taws Xob

Cov Filament yuav tsum tau tsav nrog txog 3V (nyob ntawm cov zaub). Ua ntej tshaj AC thiab ua cas kaw hauv nruab nrab rau GND. Puh, 3 qhov kev xav tau nyob hauv ib kab.

Ib zaug ntxiv hauv cov cuab yeej qub no yuav ua tiav nrog ib lub tab ntawm Transformer thiab qee yam Z -diode txuas rau GND lossis qee qhov txawv dua (xws li -24V tsheb nqaj hlau)

Qee qhov kev sim tom qab kuv pom, tias qhov yooj yim AC voltage siab dua GND yog qhov zoo txaus. DC qhov hluav taws xob, zoo li 2 AA roj teeb, kuj ua haujlwm, tab sis nws ua kom pom kev ci ntsa iab los ntawm ib sab ntawm VFD mus rau lwm qhov, lawv yog qee qhov piv txwv hauv youtube thaum koj saib "VFD".

Kuv daws

Txhawm rau kom tau txais AC qhov hluav taws xob, qhov no yog qhov hluav taws xob uas hloov pauv tas li nws qhov tsis sib xws, Kuv tuaj yeem siv H-Choj Circuit. Cov no muaj ntau heev nyob rau hauv neeg hlau los tswj DC motors. H-Choj tso cai hloov pauv kev taw qhia (polarity) thiab tseem ua kom nrawm ntawm lub cav.

Kuv nyiam DIY cov khoom siv hluav taws xob muab cov qauv me me "Pololu DRV8838" uas ua raws qhov kuv xav tau.

Tsuas yog cov tswv yim xav tau yog Lub Hwj Chim thiab lub hauv paus moos thiaj li ua rau to taub cov kev hloov pauv tas li. Moos? Hloov tawm qhov yooj yim RC keeb ntawm qhov tsis zoo tso tawm thiab PHASE cov tswv yim tuaj yeem ua zoo li oscillator rau qhov no.

Cov duab qhia pom qhov sib txuas ntawm Tus Tsav Tsheb Tsav los tsim AC voltage rau VFD filament.

Kauj Ruam 4: Sib cuam tshuam nrog 5V Logic

Tam sim no peb tuaj yeem pom tag nrho cov zaub, zoo heev. Peb yuav ua li cas qhia ib tus lej/tus lej?

Peb yuav tsum toggle txhua lub qhov rooj thiab anode ntawm lub sijhawm. Qhov no hu ua multiplexing. Kuv tau pom qee qhov kev qhia ntxiv txog qhov no ntawm no. Piv txwv li (https://www.instructables.com/id/Seven-Segment-Di…

Peb VFD muaj ntau tus pin, txhua yam no yuav tsum tau tsav nrog cov txiaj ntsig sib txawv, yog li txhua tus xav tau tus pin ntawm tus tswj. Feem ntau Cov Tswj Hluav Taws Xob me me tsis muaj ntau tus pin. Yog li peb siv cov npe hloov pauv ua chaw nthuav dav chaw nres nkoj. Cov no txuas nrog lub moos, cov ntaub ntawv thiab xaiv kab rau tus tswj lub nti (tsuas yog 3 tus pin) thiab tuaj yeem ua cascade kom muab ntau tus pin tso tawm raws li xav tau. Arduino tuaj yeem siv nws yog SPI kom ua tiav cov ntaub ntawv tawm mus rau cov chips no.

Ntawm lub vijtsam sab, muaj cov nti rau lub hom phiaj no ib yam. "TPIC6b595" nws yog daim ntawv teev npe hloov pauv nrog qhib qhov tso zis tawm, uas ua haujlwm txog 50V. Qhib ntws txhais tau tias, qhov tso tawm sab laug qhib thaum teeb tsa rau TRUE/1/HIGH thiab sab hauv transistor hloov mus rau sab qis FALSE/0/LOW. Thaum ntxiv tus tiv thaiv los ntawm tus pin tso rau V+ (50V) tus pin yuav raug rub mus txog qib qhov ntsuas hluav taws xob no tsuav yog lub transistor sab hauv tsis rub nws mus rau GND.

Lub Circuit Court qhia cascades 3 ntawm cov npe hloov pauv no. Cov Resistor Arrays tau siv los rub tawm. Lub Circuit Court tseem muaj cov kab hluav taws xob hloov hluav taws xob (H-choj) thiab cov khoom siv hluav taws xob yooj yim uas tom qab tsis lees paub thiab hloov nrog XL6009 board.

Kauj Ruam 5: Ua Tus Levelmeter

Txog qhov no kuv siv Dot matrix zaub nrog 20 tus lej thiab 5x12 pixels ib tus lej. Nws muaj 20 lub rooj vag, ib qho rau txhua tus lej thiab txhua lub pixel muaj phaj phaj. Kev tswj hwm txhua lub pixel yuav xav tau 60+20 tus neeg tswj tau tus pin xws li 10x TPIC6b595 chips.

Kuv tsuas muaj 24 tus lej tswj tau los ntawm 3x TPIC6b595's. Yog li kuv txuas ib pawg ntawm pixel rau ib qib loj qhia pixel. Qhov tseeb kuv tuaj yeem faib txhua tus lej rau 4 vim tias kuv tuaj yeem tswj 20+4 tus pin. Kuv siv 2x5 pixels ib qib qhia theem. Cov pins rau cov pixels no tau muab sib dhos ua ke, zoo li tsis meej pem tab sis nws ua haujlwm:)

PS: Tsuas yog pom txoj haujlwm no qhov twg cov zaub no tau tswj pixelwise..

Kauj Ruam 6: Programming Arduino

Raws li tau hais ua haujlwm hloov pauv yuav txuas nrog lub khoos phis tawj SPI. Hauv daim duab pinout ntawm Leonardo (Duab los ntawm Arduino) tus pin hu ua "SCK" thiab "MOSI" thiab saib xim liab. MOSI sawv rau MasterOutSlaveIn, uas yog muaj hnub tim tau nthuav tawm.

Yog tias koj siv lwm tus Arduino, tshawb nrhiav daim duab pinout rau SCK thiab MOSI thiab siv cov pins no hloov. Lub RCK teeb liab yuav tsum khaws cia ntawm tus pin 2, tab sis qhov no tuaj yeem hloov chaw thaum tseem hloov qhov no hauv cov cai.

Daim duab kos ua haujlwm AD hloov pauv ntawm tus pin A0 raws li kev pabcuam cuam tshuam. Yog li AD qhov tseem ceeb tau nyeem tas li thiab ntxiv rau thoob ntiaj teb sib txawv. Tom qab qee qhov nyeem tawm tus chij tau teeb tsa thiab lub ntsiab lus tseem ceeb khaws tus nqi tshaj tawm, hloov pauv mus rau tus pin ua dab tsi thiab hloov nws tawm mus rau SPI rau hauv TPIC6b.. Cov hloov tshiab tso tawm yuav tsum tau looped hla txhua tus lej/rooj vag dhau thiab ntau dua nrog tus nqi xws li tib neeg qhov muag yuav tsis pom nws flickering.

Raws nraim qhov haujlwm uas Arduino tau ua rau:)

Nov yog qhov chaws rau kuv Level meter display…

github.com/mariosgit/VFD/tree/master/VFD_T…

Kauj Ruam 7: PCB

Kuv tau ua ob peb PCBs rau txoj haujlwm no, tsuas yog kom muaj qhov ua kom zoo thiab huv. Cov PCB no muaj lwm qhov kev txhawb zog uas tsis muaj lub zog txaus, yog li kuv tsis tau siv nws ntawm no thiab txhaj 50V los ntawm XL6009 lub zog hloov chaw.

Qhov tsis yooj yim yog ntxiv VFD, txij li cov no tuaj yeem muaj txhua yam duab uas kuv tau sim ua rau PCB me ntsis dav hauv VFD txuas ib feem. Thaum kawg koj yuav tsum txiav txim siab tus pinout rau koj Cov Zaub thiab sib txuas cov xov hluav taws xob thiab thaum kawg hloov pauv txoj haujlwm program me ntsis kom txhua yam haum ua ke.

PCB muaj nyob ntawm no: