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Tam sim no tswj LED Tester: 4 Cov Kauj Ruam (nrog Duab)
Tam sim no tswj LED Tester: 4 Cov Kauj Ruam (nrog Duab)

Video: Tam sim no tswj LED Tester: 4 Cov Kauj Ruam (nrog Duab)

Video: Tam sim no tswj LED Tester: 4 Cov Kauj Ruam (nrog Duab)
Video: Dab neeg Vauv tsis haum niam tais 2/6/2017 2024, Kaum ib hlis
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Tam sim no tswj LED Tester
Tam sim no tswj LED Tester
Tam sim no tswj LED Tester
Tam sim no tswj LED Tester

Coob leej neeg xav tias txhua lub LED tuaj yeem siv nrog lub zog 3V tas li. LEDs qhov tseeb muaj qhov tsis sib txuas tam sim no-kev sib raug zoo. Tam sim no loj hlob nthuav dav nrog qhov hluav taws xob muab. Kuj tseem muaj kev nkag siab yuam kev tias txhua lub LEDs ntawm cov xim muab yuav muaj qhov tshwj xeeb rau pem hauv ntej. Lub zog hluav taws xob rau pem hauv ntej ntawm LED tsis yog nyob ntawm cov xim ib leeg thiab cuam tshuam los ntawm lwm yam xws li qhov loj ntawm LED thiab nws cov chaw tsim khoom. Lub ntsiab lus yog, lub neej kev cia siab ntawm koj LED yuav poob qis thaum nws tsis muaj zog siv. Yog hais tias muaj cov laij lej tawm uas qhia koj tus nqi ntawm kev tiv thaiv kom txuas hauv kab nrog koj LED, koj tseem yuav tsum kwv yees qhov ua haujlwm voltage thiab tam sim no. LEDs ib txwm tsis tuaj nrog cov ntawv teev tseg thiab yam tshwj xeeb uas lawv tuaj nrog yuav zoo heev tsis raug. Qhov kev sib tw me me no yuav tso cai rau koj txiav txim siab qhov tseeb qhov hluav taws xob thiab tam sim no muab rau koj li cas. Qhov ntsuas LED tsis yog kuv lub tswv yim qub. Kuv tuaj hla nws ntawm no. Kuv zoo nkauj heev ntsuas kuv cov LEDs zoo li nws tau ua ntej nws ua tus ntsuas; sib txuas ib qho LED, lub hwj chim ntsuas hluav taws xob, lub zog siv hluav taws xob, thiab lub ntsuas hluav taws xob. Tsis yog qhov zoo tshaj plaws ntawm cov txheej txheem thiab feem ntau muaj teeb meem. Ib qho kev tswj hwm tam sim no tsis yog qhov tshiab rau kuv tab sis nws tsis tau hla kuv lub siab los siv nws ua tus ntsuas LED. Kuv ua li cas los xij, txiav txim siab kuv lub rooj tsav xwm kom zoo dua nrog cov ntawv xeem/loops teeb tsa kom nkag siab zoo dua. Thiab thaum nws tsis muaj kev tshawb fawb foob pob hluav taws los tsim PCB txheej txheem los ntawm cov lej, Kuv tab tom muab kuv cov qauv rau koj kom yooj yim. Yog koj tshawb xyuas tus thawj sau lub vev xaib koj yuav pom tias kuv muaj qee yam ntxiv hauv kuv tus ntsuas. Nws siv lub rooj tsavxwm ob tog, yog li nws muaj peev xwm them taus cov khoom sib dhos ntawm ib sab thiab muaj cov ntaub pav ca loj nyob rau lwm sab. Kuv tau khiav tawm ntawm cov laug cam ob sab thaum lub sijhawm kuv ua kuv li. Thaum xub thawj, kuv xav tias tsuas yog muaj ib qho me me ntxiv ntawm pawg thawj coj saib rov qab nrog lub rooj tsavxwm tseem ceeb thiab muab ob qho ua ke kom tau txais ib pawg ob tog ib nrab. Tom qab ntawd kuv xav tias tej zaum kuv tuaj yeem ua lub qhov (socket) kom cov ntawv ntsuas loj tshem tawm tau thiab tuaj yeem txuas rau hauv lub khob cij rau lwm yam siv. Xav txog tias nws yuav zoo li cas, Kuv pom tau tias nws yuav muaj qhov ua tau zoo dua thiab tau xav txog kev daws teeb meem kom txo qhov siab. Tom qab ntawd nws tuaj rau kuv tias kuv tuaj yeem siv qhov chaw hauv qab thiab ntxiv cov hlau nplaum kom cov LEDs (ob qho dhau los-qhov thiab SMD) yuav lo rau cov ntaub qhwv tsis muaj kuv tuav nws nyob ntawd. Kuv sim qhov tswv yim sai nrog cov hlau nplaum thiab qee yam khoom siv thiab nws zoo li ua haujlwm. Nws tsuas yog tshwm sim rau kuv los sau Cov Lus Qhia ntawm lub ntsuas LED thaum kuv pom Lub LED Tawm! kev sib tw. Kuv twb tau siv lub tshuab ntsuas LED rau qee lub sijhawm yog li qhov no tau sau tseg tom qab nws ua tiav thiab tej zaum yuav tsis muaj duab ntawm txoj haujlwm tseem tab tom ua. Yog tias muaj ib yam dab tsi uas yuav tsum tau muab tshem tawm lossis piav qhia thov tsis txhob ua siab deb sau ntawv tawm tswv yim. Kuv xav tias tus nyeem ntawv yuav muaj tsawg kawg kev paub txog hluav taws xob yooj yim thiab muaj txuj ci txaus hauv kev siv tshuaj thiab PCB tsim. Qhov haujlwm no muaj peb ntu Qhia Qhia vim tias kuv xav tias txhua feem tsim nyog nws tus kheej phau ntawv qhia:- Lwm qhov sai PCB Prototyping Method- Sib Nqus Nto Mount Device (SMD) Adapter- Trimpot Pob Qhov Rooj

Kauj Ruam 1: Daim Ntawv Teev Npe

Cheebtsam rau lub ntsiab lus tseem ceeb: 1x 9V roj teeb 1x9v roj teeb clip1x 2-pin poj niam header txuas (pins & vaj tse) 3x 1-pin SIL socket1x 2-pin txiv neej header1x 2-pin txoj cai txiv neej header1x Shorting block1x 100nF capacitor1 x 1N4148 diode1x LM317LZ zoo kho tau tus tswj 1 x 39 ohm resistor1x 500 ohm square kab rov tav trimpot1x Poj niam header1x 8-pin IC qhov (xav tau tsuas yog tias koj tab tom ua tus adapter) 1x 50mm X 27mm tooj liab clad boardMaterials rau sib nqus SMD adapter (yeem): 1x Magnet2x 4-pin txiv neej header1x 12mm X 27mm tooj liab clad board Lub capacitor thiab diode tsis yog qhov tseem ceeb rau kev ua haujlwm ntawm Circuit Court no. Kuv siv lawv los ua kuv pawg thawj coj saib neeg nyob ntau dua. Kuv txo tus nqi ntawm cov resistor mus rau 39 ohms (tuaj yeem nyuaj nrhiav) tsis yog 47 ohms kom kuv tus ntsuas tuaj yeem tso tawm ntau txog 32mA. David Cook's version tuaj yeem tso tawm txog li 25mA. Kuv siv qee lub zog LEDs siab thiab 25mA tsis txaus tseem 32mA rau lub sijhawm luv yuav tsum tsis muaj kev phom sij rau LEDs tsis muaj zog. Koj tuaj yeem siv 47 ohm resistor yog tias koj zoo siab nrog 25mA max. Koj tuaj yeem txiav txim siab qhov max thiab min tso tawm tam sim no los ntawm kev faib tus nqi ntawm qhov ntsuas hluav taws xob ntawm LM317LZ (1.25V raws li kuv cov ntaub ntawv) dhau tus nqi ntawm koj qhov kev xav (trimpot + resistor kom raug). Min tso tawm tam sim no (trimpot teeb tsa kom siab tshaj 500 ohms): 1.25V / (500 ohm + 39 ohm) = 0.0023A = 2.3mAmax tso tawm tam sim no (trimpot teeb rau min ntawm 0 ohms): 1.25 / (0 ohm + 39 ohm) = 0.0321A = 32.1mAUse cov kab zauv saum toj no los ua tus ntsuas LED nrog qhov sib txawv tam sim no tso tawm yog tias koj xav tau. Tsuas nco ntsoov tias LM317LZ raug txwv rau qhov tso zis ntau tshaj tam sim no ntawm 100mA. Koj tseem yuav xav tau cov cuab yeej siv tshuaj, qee daim kab xev nplaum ob tog (txhawm rau txuas PCB rau lub roj teeb), thiab PCB tsim cov cuab yeej thiab cov khoom siv (nyob ntawm txoj kev siv). Koj yuav tsum muaj tag nrho cov no muaj yog tias koj tau ua dua ib qho khoom siv hluav taws xob hauv tsev.

Kauj ruam 2: Circuit Schematic thiab Layout

Circuit Schematic thiab Layout
Circuit Schematic thiab Layout
Circuit Schematic thiab Layout
Circuit Schematic thiab Layout
Schematic Circuit thiab Layout
Schematic Circuit thiab Layout

Saib cov duab rau cov txheej txheem thiab txheej txheem. Koj tuaj yeem xa mus rau Cov Lus Qhia no rau cov lus qhia ntawm kev tsim PCB. Cov Lus Qhia siv lub voj voog no ua piv txwv yog li koj tuaj yeem ua raws nws ncaj qha. TSIS TXHOB ntsuas thaum luam ntawv yog tias koj xav siv qhov txheej txheem ua lub npog ntsej muag rau photolithography lossis toner hloov.

Kauj Ruam 3: Nqe lus piav qhia thiab cov ntsiab lus

Kev piav qhia thiab Cov Lus Qhia
Kev piav qhia thiab Cov Lus Qhia
Kev piav qhia thiab Cov Lus Qhia
Kev piav qhia thiab Cov Lus Qhia
Kev piav qhia thiab Cov Lus Qhia
Kev piav qhia thiab Cov Lus Qhia

Crimp tus poj niam txuas tus pin nrog cov xov hlau ntawm 9V roj teeb clip. Koj tuaj yeem siv lub taub hau polarized hloov yog tias koj xav kom zam kev txuas lub zog tsis raug. Kuv tsis tau siv lub taub hau polarized vim tias kuv tsis muaj ntawm tes thiab lub diode nyob ntawd rau kev tiv thaiv hluav taws xob rov qab. Qhov kev ntsuas loops yog lub tswv yim zoo uas kuv txaj muag ntsaws los ntawm Robot Room. Cov no tsuas yog lub voj hlau tooj liab ntawm ob qhov nyob ze. Nco ntsoov tias kuv qhov kev ntsuas ntsuas tsis zoo me ntsis vim tias kuv tsis nco qab ua ntej lawv ua ntej muab lawv pov rau PCB. Txog lub sijhawm kuv paub tias kuv tsis nco qab, kuv twb tau kaw daim PCB rau lub roj teeb thiab kuv tsis xav tshem nws tawm, yog li qhov tsis zoo tinning. Nco ntsoov ua ntej tin koj li! Kev ntsuas loops yog qhov zoo rau clipping nrog cov kais dej lossis txuas rau ntawm qhov ntsuas hooks/clips. Kuv siv ib leeg ib sab tooj liab tooj liab, yog li tsis muaj txoj hauv kev kom muaj cov ntaub qhwv rau sab saum toj. Txawm hais tias kuv yuav tsum siv daim phiaj tooj liab ua ob sab, kuv xav tau txoj hauv kev txuas cov txheej hauv qab mus rau txheej txheej saum toj kawg nkaus. Qhov teeb meem yog, Kuv tsis nyiam vias ua nrog soldering xaim ntawm ob txheej, nws yog dab tuag. Kuv qhov kev daws teeb meem yog siv SIL qhov nyob. SIL sawv cev rau Ib Leeg Nyob Hauv Kab rau cov ntawm koj uas tsis paub. Cov no zoo ib yam li cov cuab yeej siv tshuab IC, tab sis hloov ntawm ob kab, tsuas muaj ib qho. Qhov chaw zoo li lub taub hau ib txwm nyob hauv uas koj tuaj yeem tsoo lossis txiav tawm kab nrog ntau tus pin raws li koj xav tau. Cias so/txiav tawm 3 1-pin qhov (ib qho rau txhua qhov ntsuas ntsuas). Tom qab ntawd tsoo/txiav tawm lub yas yas kom pom qhov ua tau zoo. Nco ntsoov tias tus pin muaj plaub txoj kab uas hla. Txiav qhov nqaim kawg. Qhov nqaim kawg tom ntej yuav muab tso rau hauv koj lub PCB, yog li koj lub qhov thiab cov tooj liab yuav xav tau nthuav dav. Qhov chaw muab lub qhov zoo rau txhawm rau txhawm rau taw qhia cov lus qhia ntawm koj lub ntsuas cua ntsuas. Nws tsis xav tias yuav haum, tab sis pab tiv thaiv qhov kev soj ntsuam los ntawm zawv zawg. Koj kuj tseem tuaj yeem tso cov xov hlau nyob hauv thiab tej zaum txuas nws mus rau koj lub microcontroller's ADC chaw nres nkoj. Qhov sib nqus SMD adapter txuas nrog tus ntsuas ntawm IC qhov (socket). Koj yuav tsum tau siv cov qauv IC ib txwm rau qhov no raws li txiv neej lub taub hau yuav tsis haum rau hauv tshuab-cuab yeej IC qhov nyob. Tsuas yog faib 8-pin IC lub qhov (socket) thiab tso rau ntawm PCB. Koj tuaj yeem mus ib kauj ruam ntxiv ib yam li kuv tau ua thiab tshem tawm txhua qhov kev tawm tsam me me ua ntej yuav xaws kom txhua yam tso tau zoo thiab tiaj tus. Yog tias koj ua qhov no, koj yuav zam tsis dhau ib feem me me ntawm cov khoom siv uas tsis ua mob ntau. Lub taub hau taub hau ntawm lub adapter tau txhob txwm ua kom luv kom nws haum rau hauv lub qhov (socket). Qhov no ua rau lub taub hau dag tawm tsam lub qhov (socket) uas tsis muaj qhov sib txawv hauv nruab nrab, ua kom zoo dua qub thiab qis dua qhov profile. Qhov no Qhia rau cov lus qhia ntawm kev ua cov hlau nplaum SMD adapter.

Kauj Ruam 4: Yuav Siv Tester Li Cas

Yuav Siv Tester Li Cas
Yuav Siv Tester Li Cas
Yuav Siv Tester Li Cas
Yuav Siv Tester Li Cas
Yuav Siv Tester Li Cas
Yuav Siv Tester Li Cas
Yuav Siv Tester Li Cas
Yuav Siv Tester Li Cas

Muaj ob txoj hauv kev los ntsuas LED. Ua ntej tshaj, koj tuaj yeem ntsaws nws rau hauv tus poj niam lub taub hau. Raws li daim duab 1, anode yog lub qhov saum toj thiab cathode yog lub qhov hauv qab. Qhov thib ob, koj tuaj yeem siv qhov sib nqus SMD adapter. Tsuas yog tso cov kab hluav taws xob LED tso rau ntawm lub adapter thiab nws yuav lo rau ntawd. Ib yam li ntawd, anode yog lub ncoo sab saum toj thiab cathode yog lub ncoo hauv qab. Sib nqus SMD adapter, raws li lub npe qhia, yuav tsum tau siv los ntsuas SMD LEDs. Kuv tsis muaj SMD LEDs ntawm tes tab sis qhov sib nqus SMD adapter ua haujlwm zoo li tuaj yeem pom thaum kuv sim nws nrog lub diode tsis tu ncua. Cov ntaub qhwv kuj tseem zoo rau kev nrawm kov cov coj ntawm koj LED mus rau tshuaj xyuas qhov polarity, xim, thiab ci ci. Koj tsis tas yuav txhawj xeeb txog cov ntaub qhwv luv vim tias tam sim no yuav txwv rau qhov siab tshaj ntawm 32mA. Tsis muaj teeb meem yuav ua rau lub Circuit Court lossis lub roj teeb. Qhov ntsuas no tau tsim los kom yooj yim ntawm kev ntsuas qhov hluav taws xob thiab tam sim no. Koj tuaj yeem siv cov ntawv xeem lossis cov ntawv ntsuas ntsuas. Qhov ntsuas ntsuas nruab nrab/voj yog ib txwm muaj. Sab saum toj ntsuas phoo/lub voj (xa mus rau daim duab 1) yog rau ntsuas qhov ntsuas hluav taws xob thiab hauv qab ntsuas phoo/voj yog ntsuas ntsuas tam sim no. Thaum ntsuas tam sim no, koj yuav tsum tshem qhov thaiv luv. Txhawm rau nkag siab lub hom phiaj, lub jumper tau muab tso nruab nrab thiab hauv qab cov ntawv ntsuas/loops Kev kwv yees koj lub LED tsis tuaj nrog ib qho tshwj xeeb, koj yuav xav paub ntau npaum li cas tam sim no thiab qhov hluav taws xob los muab nws kom tau txais qhov ci ci uas koj xav tau. Ua ntej tshaj, nqes koj lub ntsuas cua los ntsuas qhov tam sim no thiab tshem tawm qhov thaiv luv. Muab koj lub LED tso rau ntawm tus ntsuas thiab kho lub trimpot (koj tuaj yeem ua qhov cuab yeej yooj yim no tig lub pob qhov rooj) kom txog thaum koj txaus siab nrog qhov ci ci. Yog tias koj tsis paub meej txog qhov siab tshaj tam sim no uas koj tuaj yeem muab rau koj LED nws feem ntau muaj kev nyab xeeb los xav tias ua haujlwm zoo tshaj plaws ntawm 20mA. Sau cia ntau npaum li cas tam sim no ntws los ntawm LED (cia xav tias nws 25mA). Tom ntej no, hloov qhov luv luv thaiv thiab ntsuas qhov hluav taws xob. Sau nws cia (cia xav tias nws yog 1.8V). Tam sim no cia peb hais tias koj xav kom lub zog no coj los ntawm 5V cov khoom siv. Koj yuav tsum tau tso 3.2V los ntawm 5V kom mus txog 1.8V xav tau los txhawb koj lub zog LED (5V - 1.8V = 3.2V). Txij li thaum peb paub koj LED siv 25mA, peb tuaj yeem suav qhov kev tiv thaiv xav tau kom poob 3.2V los ntawm qhov sib npaug V / I = R.3.2V / 0.025A = 128 OhmsKoj tuaj yeem txuas 128 ohm resistor hauv nrog koj LED thiab lub zog nws nrog 5V kom tau txais qhov ci ci uas koj xav tau. Feem ntau koj yuav tsis tuaj yeem nrhiav tus tiv thaiv nrog tus nqi tseeb ntawm kev tiv thaiv uas koj tau suav. Hauv qhov xwm txheej ntawd, koj yuav xav kom tau txais qhov txiaj ntsig siab tshaj tom ntej tsuas yog kom nyab xeeb. Qhov kev sim siab!

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