Roj teeb Powered Portable VU Meter: 9 Cov Kauj Ruam (nrog Duab)

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

Cov hauv qab no yog cov lus qhia rau kev tsim lub roj teeb uas siv lub tshuab ntsuas VU, nrog rau cov lus qhia ntxaws rau kev tsim cov PCB xav tau los ua kom tiav txoj haujlwm no. Nws tau tsim los kom pom kev los ntawm 0-10 LEDs nyob ntawm seb muaj suab nrov nyob ib puag ncig. Kuv tsim nws kom txuas nrog lub dab teg, khaub ncaws, lossis saw caj dab yog tias tus qauv tsim tau qis me ntsis. Nws lub hom phiaj yog yuav tsum hnav hauv ib lub tsev so hmo ntuj lossis thaj chaw zoo sib xws uas cov nkauj ua si, raws li kev ua yeeb yaj kiab ua lwm yam rau lub ci ci. Nws tuaj yeem siv tau, txawm li cas los xij, rau ntau lub hom phiaj kev xaiv.

Kauj Ruam 1: Cov Ntaub Ntawv Yuav Tsum Tau

Rau txoj haujlwm no, koj yuav xav tau cov ntaub ntawv hauv qab no:

1. 1 LM3916 IC 2. 1 LM386 IC 3. 10 LEDs 4. 1 UV Reactive PCB Board 5. 1 18 pin IC socket 6. 1 8 pin IC Socket 7. Various SMT Resistors 8. 1 Dremel tool 9. 1 UV Exposure lub thawv 10. Txhim kho tshuaj 11. Etchant (Kuv siv Ferric Chloride) 12. 1 xaum xaum xaum zoo 13. Nplua nuj nyiaj npib tooj liab 14. 4 3v npib cell roj teeb 15. 2 Qhov rau 2 npib cell roj teeb txhua 16. 1 hloov 17. 1 lub tshuab electret microphone 18. 3 (1 uf SMT capacitors) 19. Denatured lossis Isopropyl cawv Hauv qhov pinch qee yam ntawm cov khoom siv no yuav raug yuav los ntawm Radioshack tab sis koj qhov thawj koom ruam zoo tshaj yog yuav lawv los ntawm DigiKey.com lossis los ntawm Frys Electronics, lossis lwm yam sib npaug cov chaw muag khoom hluav taws xob hauv zos.

Kauj Ruam 2: Npaj PCB Artwork

Kuv tsim PCB daim duab kos duab hauv qhov haujlwm hu ua ExpressPCB, uas muaj pub dawb rub tawm thiab ua haujlwm tsis txaus ntseeg. Qhov kos duab tshwm sim yog duab ntawm nplooj ntawv no. Tom ntej no, Kuv tau luam tawm PCB daim duab kos duab kom pom tseeb. Thaum luam tawm txheej tooj liab sab saum toj ntawm nws PCB hauv ExpressPCB, cov ntsiab lus daj tsis tau luam tawm, tsuas yog cov cim liab tau luam tawm. Tom qab ntawd kuv txiav tawm qhov luam tawm ntawm daim duab. Qhov no yuav piav qhia qhov loj thiab qhov zoo ntawm PCB. Daim duab thib peb yog qhov tshuaj ntsuam ntawm ExpressPCB qhia cov ntawv rau txhua qhov khoom siv.

Kauj Ruam 3: Txiav thiab Npaj PCB rau Raug

Txhawm rau ua PCBs, Kuv siv txoj kev tiv thaiv UV, uas tsuas yog nyuaj me ntsis ntau dua thiab muaj qhov tseeb ntau dua li cov txheej txheem hloov pauv toner. Txhawm rau pib tawm, Kuv txiav PCB kom zoo ib yam li cov qauv ntawm PCB zoo. Kuv xub kos ib lub duab plaub tib yam ntawm PCB ntawm txheej txheej tiv thaiv UV Reactive tooj liab npog fiberglass board, tom qab ntawd txiav nws tawm siv Dremel cov cuab yeej nruab nrog lub log pob zeb diamond. Nco ntsoov tias ib zaug koj tau tshem lub rooj tsavxwm los ntawm nws lub pob tiv thaiv nws yuav tsis raug rau ib qho UV. Thaum kuv tab tom ua haujlwm nrog UV cov tshuaj tiv thaiv PCBs, Kuv khaws lub chaw tso tsheb kom pom kev nrog ib lub teeb roj teeb. Fluorescent thiab halogen teeb ob qho tib si tso tawm UV lub teeb txaus uas lawv yuav nthuav tawm pawg thawj coj los ntawm txheej txheej tiv thaiv yas. Ib qho ntxiv, xyuas kom koj hnav cov iav tiv thaiv kom raug thaum txiav cov iav fiberglass.

Kauj Ruam 4: Raug UV

Tam sim no koj muaj UV rhiab heev PCB txiav rau qhov loj thiab PCB zoo txiav rau me me, koj npaj tau nthuav tawm lub rooj tsavxwm. Tsuas yog tshem cov txheej txheem tiv thaiv los ntawm PCB ua ntej koj tso qhov zoo rau nws, lossis lwm yam hmoov av yuav muab txuas rau lub rooj tsavxwm, uas yuav ua rau PCB kawg. Kuv tau ua lub thawv UV tiv thaiv los ntawm kev yuav lub teeb pom kev zoo ib yam thiab txuas nws rau sab hauv sab saum toj ntawm lub thawv yas loj. Thi tau ua haujlwm zoo rau kuv txog tam sim no, thiab yog qhov pheej yig dua tom qab ntawd yuav lub tshuab ua ntej UV. Txhawm rau nthuav tawm PCB, ua ntej tshem tawm txheej tiv thaiv, tso qhov kev pom zoo tso rau saum lub rooj tsavxwm, thiab muab tso rau hauv lub thawv UV raug. Lub sijhawm tso tawm ntawm 10-11 feeb yog pom zoo.

Kauj Ruam 5: Npaj Kev Txhim Kho thiab Txhim Kho Cov Txheej Txheem

Tam sim no koj yuav tsum siv tshuaj lom me ntsis. Thaum PCB tau nthuav tawm, tua lub teeb UV thiab npaj peb yam tshuaj uas koj xav tau. Sib tov tus neeg sawv cev txhim kho nrog cov dej tau teev tseg hauv lub raj mis, thiab tso rau hauv lub khob yas loj txaus kom pw hauv PCB tiaj tus.. Ua kom ntseeg tau tias lub ntim uas koj tso cov tshuaj pleev rau hauv yog ua yas, cov tooj liab thiab tshwj xeeb tshaj yog Ferric Chloride yog qhov nyiam noj los ntawm cov hlau uas lawv tau ntsib. Hauv daim duab tseem ceeb qhia hauv qab no, cov kua dej xiav yog tus sawv cev txhim kho (nws pib meej) cov kua txiv kab ntxwv yog theem yaug, thiab cov dej xim av tsaus heev yog Ferric Chloride.

Kauj Ruam 6: Txhim Kho thiab Txhim Kho PCB

Thaum lub rooj tsavxwm tau nthuav tawm, tso nws mus rau tus tsim kev daws teeb meem. Nco ntsoov hnav cov hnab looj tes tiv thaiv cov tshuaj tiv thaiv koj txhais tes. Kuv pom zoo kom muab lub hnab looj tes tuab tuab tuab uas tau yuav los ntawm cov khw muag khoom nruab nrab. Cov no yog qhov zoo tshaj qhov nruab nrab hnab looj tes looj uas lawv tiv thaiv lub dab teg, lawv tiv taus kua muag thiab puas, thiab lawv tuaj yeem rov siv tau. Thaum lub rooj tsavxwm tau tsim los rau lub ntsiab lus tias tsuas yog cov cim uas xav tau pom zoo li cov cim ntxiv uas tiv taus (cov xim ntsuab ntawm lub rooj tsavxwm) thiab thaj tsam ib puag ncig tau nthuav tooj liab, koj yuav xav yaug lub rooj tsavxwm. Yog tias tag nrho cov ntawv tawm tsam tawm los, pawg thawj coj tau yuav nthuav tawm ua ntej koj xav kom nws ua lossis nws tau tso tseg hauv cov neeg tsim khoom daws tau ntev heev. Yog tias tsis muaj ib qho tshuaj tiv thaiv tawm los, pawg thawj coj yuav tsis raug nthuav tawm kom raug. Thaum lub rooj tsavxwm tau yaug, koj yuav tsum muaj peev xwm pom cov cim uas xav tau hauv ntsuab ntsuab tiv thaiv, raws li qhia hauv thawj daim duab ntawm nplooj ntawv no. Tamsim no lub rooj tsavxwm npaj tau muab sau ua lwm yam. Ferric Chloride ua haujlwm sai dua thaum ua kom sov thiab ntxhov siab, tab sis ua haujlwm tau zoo nrog ob qho tib si. Tso lub rooj tsavxwm hauv Ferric Chloride, tshuaj xyuas nws ib nrab teev lossis ib teev uantej, kom txog thaum txhua tus tooj liab tau raug tshem tawm, zoo li hauv daim duab thib ob. Thaum lub rooj tsavxwm tau raug tshem tawm, tshem nws tawm ntawm Ferric Chloride thiab yaug nws kom huv hauv qhov yaug theem. Thaum kawg, tshem cov etch tawm tsam ntawm qhov xav tau ib qho uas siv los ntawm denatured lossis isopropyl cawv. Tam sim no PCB tau npaj txhij los ua qhov drilled.

Kauj ruam 7: Drilling

Tam sim no koj yuav tsum tau laum qhov hauv PCB rau qhov dhau los. Kuv tus qauv rau lub VU ntsuas no siv ntau yam SMT cov khoom siv tau ua kom yooj yim dua ntawm lub rooj tsavxwm thiab txhawm rau txo qhov kev khawb, uas kuv pom tias yog ib qho ntawm qhov txaus siab tshaj plaws ntawm kev ua ib qho PCB. Mkae nco ntsoov siv lub laum xovxwm, lossis lub laum ntsis yuav luag tiag tiag. Kuv siv 3/32 laum me ntsis los ua qhov. Qhov laum me ntsis yog lub cuab yeej dremel siv me ntsis hauv Tsev Depot. Thawj daim duab qhia kuv qhov teeb tsa kev teeb tsa thiab qhia lub rooj tsav khoom thaum nws tau siv ib nrab, thaum daim duab thib ob qhia lub rooj tsavxwm nrog txhua lub qhov drilled tshwj tsis yog cov rau cov tuav lub roj teeb, uas xav tau lub qhov loj dua li cov coj tau tuab dua.

Kauj Ruam 8: Txhim Kho Cov Cheebtsam rau Pawg Thawj Coj

Nws tau kwv yees tias koj muaj cov txuj ci sib txuas nruab nrab, vim tias kuv yuav tsis npog cov hauv paus tseem ceeb ntawm kev hla lub qhov ntawm no, muaj ntau Cov Lus Qhia uas npog qhov txuj ci no, Kuv tsuas yog mus rau qhov tob nrog kev hais txog kev siv lub tshuab SMT, lossis ntu saum npoo, Cheebtsam. Txhawm rau txhawm rau txhawm rau SMT cov khoom, ua ntej ua kom sov ib ntawm ob daim ntawv SMT thiab yaj qee cov laug kom npog nws zoo ib yam, raws li pom hauv thawj daim duab. Tom ntej no, tuav cov xaum xaum xaum rau ntawm lub ncoo nrog cov laug rau ntawm nws, tswj nws hauv lub xeev ua kua, thaum tuav cov khoom sib dhos ua ke nrog ib khub pliers zoo. Tom qab ntawd tshem tawm cov xaum xaum, tso cov laug kom txias. Thaum kawg, ua kom sov lwm lub ncoo thiab yaj qee cov laug nyob ntawd, kom ntseeg tau cov khoom siv sib txuas zoo thiab txuas hluav taws xob zoo. Qhov pom kev zoo ntawm cov kab laug sab uas koj yuav mus yog muaj nyob hauv daim duab thib ob. Daim duab thib peb qhia qhov loj me ntawm SMT cov khoom kuv siv, piv rau 5 mm LED. Daim duab thib plaub qhia tag nrho cov khoom siv SMT txuas nrog, qhov duab thib tsib qhia txog yam khoom siv uas kuv siv. Kuv pom zoo kom siv cov nyiaj nplua-cov kabmob rosin-core solder, xws li cov laug no kuv tau yuav los ntawm Radioshack. Thaum kawg, txhuam ntawm txhua qhov dhau los.

Kauj Ruam 9: Npaj rau Kev Xeem thiab Ua Tiav

Ntxig plaub lub roj teeb (2 rau ib tus tuav) thiab VU Meter yuav tsum ua kom tiav. Qhib nws ntawm kev siv qhov hloov pauv thiab tam sim no yuav tsum teb rau cov neeg tham nrog rau lwm cov suab nrov ib puag ncig. Piv txwv tias nws ua haujlwm raws li tau npaj tseg, VU meter tau ua tiav tam sim no.