Tsim kom muaj Dual 15V Cov Khoom Siv Hluav Taws Xob Siv Tawm Cov Txee Modules rau Hauv $ 50: 10 Cov Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:29

Taw qhia:

Yog tias koj yog tus nyiam ua haujlwm uas cuam tshuam nrog suab, koj yuav paub nrog cov khoom siv hluav taws xob tsheb nqaj hlau. Feem ntau cov hwj huam suab qis xws li pre-amps xav tau qhov twg los ntawm +/- 5V txog +/- 15V. Muaj lub zog siv hluav taws xob ob zaug ua rau nws yooj yim dua thaum tsim qauv tsim lossis tsuas yog kev kho dua tshiab.

Cov khoom siv hluav taws xob no yooj yim los tso ua ke raws li nws feem ntau siv tawm ntawm lub rooj teeb tsa pawg thawj coj nrog kev zam ntawm pawg tswj hwm, uas koj yuav tsum tsim koj tus kheej. Txawm li cas los xij muaj qhov laj thawj nyob tom qab uas kuv yuav los rau tom qab.

Pawg tswj hwm siv cov kwj hluav taws xob los ntawm +/- 1.25V txog 37V (nyob ntawm koj qhov hluav taws xob nkag). Kuv tsuas xav tau +/- 15V, yog li lub hwj huam tawm tswv yim muab ob peb volts saum toj no (ncig 19V) zoo. LM317 thiab LM337 tus tswj hluav taws xob tseem tuaj yeem tso tawm ib puag ncig 1.5A ea (nyob ntawm seb qhov hluav taws xob ntau npaum li cas lawv tab tom poob), yog li cov khoom siv hluav taws xob tso tawm qhov ntsuas tam sim no kuj xav tau siab dua qhov no. Tias yog vim li cas kuv xaiv ob lub laptop khoom siv hluav taws xob los muab cov hluav taws xob nkag. Lawv tso tawm 19V thiab ib puag ncig 3.4A, uas ntau dua li txaus los muab cov tswj hwm pawg tswj hwm. Tsis txhob hais tias lawv pheej yig li chips.

Kuv kuj xav tau cov khoom siv hluav taws xob tawm raws li lawv ib txwm muaj tsawg dua DC ripple ntawm cov zis (txawm hais tias tsis muaj txiaj ntsig zoo li kev hloov pauv tag nrho-hom fais fab mov). Siv qhov hloov pauv-hom kev tawm tswv yim muab lub zog tso rau 240VAC rau 19V yog pheej yig thiab siv tau. Lawv qhov kev hloov pauv kuj tseem feem ntau nyob saum lub suab kaw suab yog li tsis cuam tshuam rau lub zog hluav taws xob nrov mus rau hauv koj daim ntawv xeem. Cov tswj hwm txoj kab yuav lim tawm feem ntau ntawm DC ripple. Yog li, koj yuav tau txais qhov zoo tshaj plaws ntawm ob lub ntiaj teb.

Cov ntsuas siv tuaj yeem ntsuas qhov ntsuas hluav taws xob thiab tam sim no (0-100V thiab 0-10A), yog xim ob xim kom nyeem tau yooj yim.

Nrog qee qhov kev hloov kho, koj tuaj yeem tig ib pawg ntawm cov khoom mus rau hauv lub rooj ntev zaum uas muaj txiaj ntsig zoo tshaj plaws.

Nco tseg: Ib yam uas lub zog siv hluav taws xob no tsis muaj thiab yog qhov kev tswj hwm tam sim no tsis tu ncua. LM317/337 tus tswj hwm lawv tus kheej muaj qee qhov dhau los tiv thaiv tam sim no, txawm li cas los xij kuv yuav tsis khiav lawv ntev li no. Tias yog vim li cas qhov hloov pauv tau muab tso rau hauv txoj haujlwm no. Yog li yog tias qhov kev xa khoom tuaj, koj tuaj yeem siv pawg tswj hwm sib txawv kom haum rau koj cov kev xav tau.

Kauj Ruam 1: Ib Lo Lus Ceeb Toom & Cov Lus Tseem Ceeb

240V Cov Hluav Taws Xob & Cov Khoom Siv Hluav Taws Xob:

Raws li txoj haujlwm no siv qhov hluav taws xob siab (240V), lawv tuaj yeem ua rau tuag taus yog tias koj ua tsis raug. Yog tias koj tsis paub meej tias yuav ua li cas thiaj li txuas tau cov khoom siv hluav taws xob siab, lossis tsis yooj yim ua haujlwm ntawm cov cuab yeej nyob, kuv qhov lus pom zoo yuav tsis txhob sim qhov no. Kuv tsis muaj lub luag haujlwm yog tias koj tua koj tus kheej. Kuv tsis xav hnov los ntawm koj tom qab koj tuag hais Pete, Kuv tau txiav kuv tus kheej thiab tam sim no kuv tuag lawm - OK ??

Tam sim no nrog qhov tau hais, koj muaj ob peb lwm txoj kev xaiv:

1. Tsuas yog siv lub khoos phis tawj siv hluav taws xob hauv lawv daim ntawv muab thiab siv qee qhov txuas hluav taws xob DC nyob tom qab ntawm lub npov. Nws tsuas yog txhais tau tias koj yuav tsum ntsaws ob lub laptop khoom siv hluav taws xob - tab sis nws yog qhov kev xaiv nyab xeeb dua. Txawm li cas los xij, koj yuav tsum nrhiav lwm qhov kev daws teeb meem rau lub zog ntsuas LED vim lawv xav tau cov khoom siv cais ib yam.

2. Koj tuaj yeem txhim kho lub laptop khoom siv hauv rooj plaub, thiab tsuas yog txiav 240V ntsaws thiab xaim lawv ncaj qha mus rau IEC lub qhov (socket) nyob tom qab. Txawm li cas los xij, koj yuav xav tau rooj plaub loj dua qhov kuv tau siv thiab dua, nws tau txais kev sib txuas nyob yog li tseem tsis muaj kev nyab xeeb..

LED Vaj Huam Sib Luag Meters + Muab Voltages:

Muaj ntau hom LED ntsuas hauv khw. Lawv txhua tus yeej ua qhov zoo ib yam, txawm li cas los xij lawv cov kev sib txuas tsis zoo ib yam. Tawm mus ntawm qhov ntsuas ntawm xaim tsis yog ib txwm lav. Thaum xaj khoom, sim thiab tau txais lawv daim duab kab hluav taws xob. Feem ntau ob txoj hlua tuab yuav yog lub ntsuas ntsuas tam sim no. Lwm qhov peb yuav yog lub zog ntsuas hluav taws xob (txhawm rau ua kom pom cov xim liab/dub) thiab lub teeb pom kev daj daj los ntsuas qhov ntsuas hluav taws xob.

Dab tsi koj yuav pom nrog lub ntsuas yog tias lawv muaj lub ntiaj teb ib txwm lossis 0V taw tes (cov xov hlau dub txuas nrog ua ke sab hauv). Rau qhov haujlwm tshwj xeeb no uas tsis zoo. Qhov no yog vim li cas cov ntsuas hluav taws xob tau sib cais ntawm ob lub rooj fais fab me me (240VAC rau 12VDC module board). Koj kuj tseem yuav tsum tau siv ob lub rooj tsavxwm rau lub zog, txwv tsis pub koj yuav siv sijhawm luv thaum siv lub zog siv. Lwm qhov laj thawj tseem ceeb yog tias LED ntsuas xav tau yam tsawg kawg lossis 4.5V kom khiav. Yog li yog tias koj tig koj cov zis tawm rau 1.25V los ntawm pawg tswj hwm, cov ntsuas yuav tsis ua haujlwm.

Kauj Ruam 2: Nqi Khoom

Nov yog yam koj xav tau. Koj tuaj yeem yuav txhua qhov no tawm ntawm Ebay, Amazon lossis Aliexpress. Kuv yuav nws txhua qhov ntawm Ebay

- Case Case Plastic (Kuv tau siv cov ntaub ntawv yas) - $ 12-15

- 1x LM317/337 Regulator Kit Board - $ 10

- 2x 19V 3.42A Laptop Cov Khoom Siv Hluav Taws Xob - $ 6.75 ea

- 2x 240VAC rau 12VDC 450mA hloov pauv -theem nqis rau cov laug cam - $ 1.50 ea

- 2x Voltage/Cov Vaj Huam Sib Luag Tam Sim No 0-100V/0-10A- $ 3.50 ea (pheej yig dua thiab muaj ntau xim sib txawv)

- 2x 10K ohm ntau tig lauj kaub + pob qhov rooj kom haum - $ 2 ea (koj tuaj yeem siv lub lauj kaub nkag, tab sis ntau tig tau yooj yim teeb)

- Lwm yam thiab kho vajtse dav: 240VAC hloov (Kuv siv ib qho nrog 12VDC LED teeb), khi txoj kab dav dav (6), IEC lub qhov (socket), fuses thiab cov tuav fuse (3), txiav me me ntawm aluminium kaum (2), sawv ntsug (6), dav dav ntawm cov hlau thiab cua sov ntsws - tej zaum lwm $ 5-10

Nco tseg 1: Cov fuses siv yuav nyob ntawm seb koj xav siv tam sim no ntau npaum li cas. Kuv xav qhia 1-1.5A rau ob pawg tswj hwm thiab 0.5A rau 240V cov khoom siv. Koj tuaj yeem nqis qis dua li koj yuav tsis kos 7A los ntawm ob qho khoom siv.

Nco tseg 2: Qhov kim tshaj plaws ntawm kev tsim yog rooj plaub. Yog li yog tias koj tuaj yeem pom ib qho pheej yig dua lossis xav yob koj tus kheej nws yuav txuag koj ob peb nyiaj.

Nco tseg 3: Muaj ob peb lub npe ntawm ntau qhov tig los yog cov lauj kaub muaj tseeb Ib qho xa yog lub lauj kaub Bochen muaj npe, uas muaj cov pob qhov tshwj xeeb muaj thiab tsis siv cov txheej txheem ntxhib pob qhov rooj. Nws tsis muaj teeb meem tshwj xeeb uas hom twg koj siv, tsuas yog koj tuaj yeem tau txais pob qhov rooj kom haum.

Nco tseg 4: Kuv yuav cov khoom siv laptop no vim lawv tsuas yog kwv yees li $ 6ea. Txuag ob peb nyiaj ntxiv yog tias koj tshwm sim muaj ob peb tus qub qub tso.

Kauj Ruam 3: Schematics & Cov Kab Xaim

Thawj daim duab yog thawj daim phiaj rau pawg tswj hwm cov khoom lag luam, nrog lub kaus mom thiab lub kho qhov muag suav nrog, siv AC 12V-0V-12V hloov pauv kom muaj zog rau pawg thawj coj (rau lub hwj chim no peb tsis siv)

Daim duab thib ob yog daim duab kab thaiv rau txhua tus laug cam los txuas ua ke

Cov duab thib peb thiab Plaub yog cov duab kab hluav taws xob rau cov ntsuas vaj huam sib luag (Kuv tau siv) qhia kev teeb tsa sib txawv rau lub zog thiab ntsuas. Qhov tseem ceeb hauv txoj haujlwm no, peb siv daim duab thib plaub.

Kauj Ruam 4: Lub Hwj Huam Laptop

Vim Li Cas 19V Laptop Cov Khoom Siv Hluav Taws Xob?

Qhov laj thawj rau qhov no yog tias pawg tswj hwm lub hauv paus tau tsim los kom khiav tawm ntawm 12V AC hloov pauv (12V-0-12V). Txawm li cas los xij, yog tias koj saib tus nqi ntawm ib qho ntawm no los ntawm ebay lossis hauv koj lub khw hluav taws xob hauv cheeb tsam - lawv nyob ib puag ncig $ 30AU. Ob lub laptop khoom siv los nyob ib nrab ntawm qhov ntawd.

Yog tias koj xav tau qhov hluav taws xob siab dua ntawm cov tswj hwm, tsuas yog siv cov khoom siv hluav taws xob siab dua. Nco ntsoov cov tswj hwm pawg thawj coj yuav tso tawm +/- 37V, yog li cov tswv yim tuaj yeem yog ob peb volts saum toj no. Tsuas yog nco ntsoov tias, qhov siab dua qhov sib txawv ntawm qhov hluav taws xob (nkag mus rau cov zis), ntau dua cov cua sov uas tsim los ntawm cov tswj hwm. Piv txwv li: yog tias qhov hluav taws xob nkag yog 35V thiab tso tawm yog 5V, yuav muaj cua sov tsim ntau thiab koj yuav xav tau cov cua sov loj dua thiab/lossis kiv cua.

Npaj Cov Khoom Siv Laptop

Txog kuv qhov kev tsim, Kuv coj cov khoom siv tawm ntawm lawv rooj plaub raws li kuv xav tau lawv kom haum rau hauv rooj plaub ntsuas. Yog tias koj tsuas yog yuav siv lub khoos phis tawj siv khoom li qub thiab siv DC txuas koj tuaj yeem hla cov kauj ruam no.

Dab tsi koj yuav tsum tau ua yog tsoo cov ntaub yas. Siv tus ntsia hlau tiaj tus thiab ua tib zoo txhuam cov ntug kom txog thaum sab saud tawm. Tom qab ntawd tshem lub rooj sib tham ntawm pawg thawj coj saib.

Hauv daim duab thib ob, Kuv tau laum ib qho ntawm lub kaum sab xis txhuas thiab tau hlais qee qhov rau sab ntawm cov khoom siv (Kuv ntseeg tias kuv tau siv cov qhov uas twb muaj lawm hauv cov khoom siv). Ceev faj tsis ua kom puas ib yam khoom thaum koj ua qhov no. Kuv kuj tseem tau nqus qee qhov ntxiv rau cov ntsia hlau txuas cov ntawv rau nws thiab txuas lub rooj sib dhos mus rau hauv qab ntawm rooj plaub yas. Kev siv lub kaum sab xis ua rau nws muaj zog me ntsis ntau dua li tsuas yog siv cov ncej teeb tsa.

Cov xov hlau tawm los ntawm pawg thawj coj saib lub teeb me ntsis, yog li kuv tau hloov lawv mus rau qhov hnyav dua ntsuas cov xaim. De-solder cov xov hlau qub, ntxig cov xov hlau tshiab los ntawm sab saum toj ntawm lub rooj tsavxwm thiab muab lawv tso rau hauv qhov chaw hauv qab ntawm lub rooj tsavxwm (hauv qab qhov muag Kuv yuav tsum tau siv lub ntsuas qhov sib dua tab sis ntev dua vim nws nyuaj nrog ntau cov xov hlau txuas rau tib cov ntsiab lus).

Cov khoom siv laptop tseem muaj lub zog LED. Lawv tsis xav tau, txawm li cas los xij koj tuaj yeem khaws cia rau hauv yog tias koj xav tau kev lees paub tias txhua qhov kev xa khoom tau ua haujlwm tau zoo (lawv yuav tuag yog tias muaj teeb meem nrog kev muab khoom lossis tus lej raug kos). Kuv khaws lawv rau qhov yooj yim nrhiav qhov ua txhaum.

Nco tseg: Koj yuav tsum siv tib lub laptop fais fab mov. Qhov laj thawj yog tias yog tias qhov hluav taws xob tawm los ntawm qhov me me, lawv tuaj yeem ua rau cov dej ntws mus rau hauv lawv tus kheej thiab khiav tawm thiab tom qab ntawd tshuab. Feem ntau, nws yuav tsum tsis muaj teeb meem yog tias koj siv cov khoom siv tib yam. Txawm li cas los xij, yog tias koj txhawj xeeb lossis xav tau kev tiv thaiv ntxiv, koj tuaj yeem tso ob peb lub zog diodes (xws li IN4004 lossis IN5404) thim rov qab tsis ncaj ncees nyob thoob qhov txiaj ntsig ntawm txhua qhov khoom siv (yog li cathode rau qhov zoo, anode rau qhov tsis zoo). Qhov no yuav tso tseg txhua qhov kev xa khoom los ntawm kev poob ib qho tam sim no los ntawm qhov hluav taws xob tau qis me ntsis lossis yog tias ib qho khoom siv muaj zog ua ntej lwm qhov.

Kauj Ruam 5: Tsim LM317/337 Regulator & Kev Xeem Pib

Pawg tswj hwm los hauv cov khoom siv, txhais tau tias koj yuav tsum tau muab tshuaj txhuam koj tus kheej. Muaj qee tus neeg muag khoom uas yuav muag lawv ua ntej sib sau ua ke rau ob peb duas las ntxiv. Qee zaum, tshem tawm cov khoom sib txawv los ntawm cov laug cam no tuaj yeem yuam kev hla txoj kab. Koj yuav tsum tau tshem qee cov khoom ib qho ntxiv, yog li nws tsuas yog yooj yim los tsim lawv hauv thawj qhov tsis muaj lawv.

Thawj daim duab qhia txog lub rooj tsavxwm tiav (uas yog nws yuav tsum zoo li cas yog tias koj ua nws cov khoom lag luam). Daim duab thib ob txawm li cas los xij qhia qhov kev hloov kho nrog lub kaus mom thiab lub rectifier raug tshem tawm. Kuv tau ntxiv cov txuas txuas hloov pauv qhov nkag mus rau lub dav hlau thaiv kom lees txais +/- 19V thiab coj ncaj qha rau cov tswv yim tswj hwm. Koj tuaj yeem khaws cov ntawv ntim yog tias koj xav tau tab sis lawv tsis tsim nyog raws li cov khoom siv laptop zoo nkauj.

Koj kuj tseem yuav tau ceeb toom Kuv tau muab tso rau hauv lub dav hlau rau lub teeb hluav taws xob LED thiab tseem lub lauj kaub tsuas yog ua kom yooj yim tshem cov laug cam yog tias tsim nyog.

Yog li cia li sib sau ua ke lub rooj tsavxwm raws li lawv cov lus qhia tshwj tsis yog rau kev hloov kho saum toj no.

Thaum ua tiav, nqes nws mus rau lub zog ua haujlwm thiab txheeb xyuas qhov tso tawm ntawm txhua tus tswj theem. Nco ntsoov, yog tias siv cov khoom siv ib leeg nkaus xwb los ntsuas, +/- hauv (ntawm +/0V cov dav hlau) +/0V tawm ntawm pawg tswj hwm. +/- hauv (ntawm 0V/- terminals), 0V/- tawm ntawm pawg tswj hwm. Nco ntsoov tias koj tuaj yeem hloov kho qhov hluav taws xob tso tawm (daim duab kawg qhia pom kev ntsuas hluav taws xob sab nraud).

Kauj Ruam 6: Npaj Qhov Case

Ntsuas seb koj xav kom koj cov khoom nyob sab nraub qaum ntawm lub hauv ntej thiab nraub qaum. Nco ntsoov, nws yuav rov qab mus rau pem hauv ntej (Kuv ua qhov yuam kev kuv tus kheej). Qhov tseeb, kuv xav tau daim iav duab ntawm lub vaj huam sib luag pem hauv ntej. Tab sis hmoov zoo, kuv tseem tsis tau ua lub vaj huam sib luag tom qab, yog li kuv tsuas yog ua kom haum rau sab xub ntiag (lossis kuv yuav cia li tig nws ncig 180 deg).

Laum qhov siv cov khoom me me ua ntej. Tom qab ntawd nthuav dav nrog lub laum loj dua. Yog tias koj tsis muaj cov khoom siv loj txaus (raws li kuv muaj), koj tuaj yeem siv lub reamer los nthuav cov qhov (cov cuab yeej siv tau yooj yim heev).

Thaum tag nrho cov qhov raug drilled, tshem qhov txiav tawm rau lub ntsuas qhov ntsuas thiab sau cia kom txaus kom lub ntsuas thiab IEC qhov (socket) haum.

Kuv kuj tau ntxiv qee daim ntawv rau pem hauv ntej (siv cov ntawv sau). Koj tuaj yeem tau txais cov no online, lossis koj tuaj yeem luam koj tus kheej ntawm cov ntawv luam ntawv meej. Tom qab ntawd kuv tsuas yog txau qee cov kua nplaum tiv thaiv rau saum.

Kauj Ruam 7: Mounting Hardware

Thaum cov vaj huam sib luag pem hauv ntej thiab nraub qaum tau muaj sijhawm los qhuav, txhim kho txhua yam khoom siv ntawm lub vaj huam sib luag pem hauv ntej thiab nraub qaum.

Ob lub laptop khoom siv hluav taws xob tuaj yeem ntsia rau hauv qab ntawm rooj plaub. Nco ntsoov tawm hauv chav rau IEC lub qhov (socket), fuse thiab xov hlau kom khiav mus rau qhov hloov ntawm lub hauv ntej. Xwb, koj tuaj yeem hloov qhov hloov mus rau tom qab yog tias koj xav tau.

Mount lub regulator board.

Qhov kawg tab sis tsis tsawg, raws li 240V/12V cov khoom siv fais fab rau lub ntsuas qhov ntsuas tsis muaj nyob qhov twg rau lawv kom tau ntsia hlau ntsia, Kuv tau siv lub pob zeb ntawm silicon los tuav lawv hauv qhov chaw. Tsuas yog xyuas kom koj tau ntxiv cov tswv yim thiab cov xov hluav taws xob ua ntej!

Kauj Ruam 8: Txhim Kho Txhua Qhov

Pib los ntawm kev xaim hluav taws xob 240V thaiv los ntawm IEC ntsaws rau qhov hloov pauv thiab tseem muaj lub fuse tuav. Tom qab ntawd txuas tag nrho 240V txuas mus rau ob lub khoos phis tawj siv hluav taws xob thiab ob lub ntsuas khoom siv ntsuas. Ntxig ib lub fuse thiab nyob rau theem no, tej zaum nws yog lub tswv yim zoo los tshuaj xyuas koj cov xov hlau thiab txuas lub zog, tsuas yog kom ntseeg tau tias txhua qhov hluav taws xob tawm ntawm lub khoos phis tawj laptop raug (yuav tsum yog 19V txhua)

Txuas lub lauj kaub thiab LED mus rau lub vaj huam sib luag pem hauv ntej tswj los ntawm pawg tswj hwm. Kuv tau siv 2-tus pin thiab tus pin los ua kom sib dhos yooj yim dua ntawm cov tswj hwm pawg tswj hwm.

Tam sim no txuas cov khoom siv ntawm lub khoos phis tawj laptop thiab txuas mus rau lub tswv yim tswj hwm pawg thawj coj saib. Koj tseem tuaj yeem txuas lub zog rau lub ntsuas. Nco ntsoov, qhov zoo ntawm ib qho khoom siv mus rau qhov tsis zoo ntawm lwm qhov los tsim qhov xoom hluav taws xob xoom taw tes. Ntxiv dua thiab, xyuas kom tseeb tias qhov hluav taws xob tau raws li qhov xav tau - koj yuav tsum muaj 38V nruab nrab ntawm cov khoom siv hluav taws xob, +/- 19V nruab nrab ntawm 0V ntawm cov tswv yim thiab qee qhov nominal voltage ntawm qhov tso tawm ntawm pawg tswj hwm (nyob ntawm qhov chaw uas lub lauj kaub tau teeb tsa).

Txuas cov khoom tso tawm ntawm lub rooj tswj hwm lub zog rau cov zis fuses thiab hloov hloov. Txuas lub ntsuas kab tam sim no (raws li daim duab thaiv kab ntawv) thiab tom qab ntawd pom cov kab hluav taws xob los ntawm lub ntsuas. Ntxig qee qhov fuses thiab rov ua dua, ntsuas thiab saib seb cov ntsuas puas tau nyeem qhov hluav taws xob. Ntiv tes hla, koj tsis tau tso cov pa luam yeeb ua kom dim!

Nco tseg: Cov ntsuas ntsuas yog qhov nyuaj tshaj plaws kom khiav. Tsuas yog nco ntsoov tias tam sim no ib feem ntawm cov ntsuas khiav los ntawm qhov zoo mus rau qhov tsis zoo. Tib yam yuav tshwm sim nrog qhov tsis zoo - nws ntws los ntawm 0v mus rau qhov tsis zoo!

Kauj Ruam 9: Kev Xeem thiab Kev Xeem Kho

Thaum koj tau txheeb xyuas tias haus luam yeeb tsis dim, nqes mus rau lub ntsuas ntsuas uas ntseeg tau thiab txheeb xyuas qhov hluav taws xob tso tawm ntawm ob qho txiaj ntsig zoo thiab tsis zoo. Koj yuav zoo li pom tias cov ntsuas LED tawm me ntsis (zoo li hauv duab 2 + 4). Raws li cov ntsuas no tuaj yeem tawm me ntsis ntawm qhov kawg ntawm qhov pom kev, ntsuas lawv rau qhov ntsuas hluav taws xob uas koj ib txwm siv feem ntau lossis nyob hauv nruab nrab ntawm qhov ntsuas hluav taws xob. Piv txwv li yog tias koj siv 12V ntau, ntsuas lawv rau 12V. Yog tias koj mus ntawm 5V txog 15V tsis tu ncua ces ntsuas ntawm 10V.

Yog tias koj muaj ob lub multimeter koj tuaj yeem ua qhov hluav taws xob thiab hloov kho tam sim no ua ke. Txwv tsis pub, txuas lub luag haujlwm me me rau qhov tso tawm, kho qhov hluav taws xob, tom qab ntawd tshem lub ntsuas tawm thiab muab tso ua ke nrog lub zog hluav taws xob thiab sib pauv cov xov tooj cua multimeter (yog tias koj lub meter muaj cais qhov hluav taws xob thiab cov kab hluav taws xob tam sim no) los ntsuas qhov tam sim no.

Nyob tom qab ntawm lub vaj huam sib luag LED ntsuas, yuav muaj ob lub lauj kaub me me los kho qhov hluav taws xob (v-adj) thiab tam sim no (i-adj) (saib daim duab ib). Feem ntau nws yog lub tswv yim zoo los thauj cov zis nrog lub resistor thaum ntsuas raws li qhov hluav taws xob tso tawm yuav txav me ntsis thaum thauj khoom.

Yog li hloov kho v-adj kom txog thaum qhov hluav taws xob nyeem zoo ib yam li lub ntsuas. Cov kws txiav plaub hau me ntsis thiab tig me me tuaj yeem hla dhau qhov koj xav tau. Cia li ua siab ntev kom txog thaum nws raug

Txog qhov kev hloov kho tam sim no, kuv xav kom siv lub cua sov loj tso rau hauv qhov ntsuas kom ntsuas (daim duab 6). Tsuas yog xyuas kom nws tsis qis dua qhov khoom tuaj yeem tso tawm. Txhua sab ntawm pawg tswj hwm tuaj yeem muab 1.5A. Kev ntsuas nws nyob ib puag ncig 1A yuav tsum txaus.

Siv txoj cai ohms V = IxR - yog li (V/I = R) 15V/1A = 15ohms. 15 ohm resistors yog qhov nyuaj me ntsis los ntawm 2x 8ohm resistors hauv koob yuav muab 16ohms. Ntsuas cov resistors - ob qho kuv tau ntsuas 8.3 thiab 8.1 ohms = Tag nrho 16.4 ohms.

Yog li, ntsaws cov lej ntxiv (V/R = I) 15V/16.4ohms = 0.914634A - qhov ntawd yog tus lej peb yuav ntsuas rau. Koj yuav tsum nrhiav lub ntsuas yuav tsum tso tawm qhov no ntxiv rau ob zaug ntawm koj lub ntsuas.

Koj kuj tseem yuav tau suav lub zog raug tso rau hauv cov resistors vim koj tsis xav kom lawv kib! Yog li, ohms txoj cai dua P = VxI - 15Vx0.91463 = 13.72W. Xyuas kom tseeb tias koj cov resistors yog txhua qhov loj dua tus nqi no - 25W yog qhov zoo. Kuv tau siv ob peb 100W uas yog kub (saib daim duab 6). Koj tuaj yeem tau txais cov no tawm ntawm eBay txog $ 8 rau ob.

Txhawm rau ntsuas tam sim no tawm ntawm cov khoom siv, koj yuav tsum tau tso koj lub 'meter' ua ntu nrog cov khoom siv hluav taws xob thiab cov khoom tiv thaiv. Tsis muaj teeb meem yog tias lub ntsuas ntsuas xub thawj lossis tus tiv thaiv, tsuas yog xyuas kom qhov tam sim no ntws los ntawm lub ntsuas ntsuas yog qhov zoo rau qhov tsis zoo (yog li zoo & 0V lub dav hlau - zoo/tsis zoo ntawm lub dav hlau tam sim no) Qhov tsis zoo ntawm qhov khoom yuav tsum ntsuas los ntawm 0V mus rau qhov tsis zoo nrog qhov ntsuas ntawm qhov ntsuas mus rau 0V thiab qhov tsis zoo ntawm lub ntsuas mus rau qhov tsis zoo ntawm lub hwj chim. Yog tias tsuas yog ua rau koj tsis meej pem - saib daim duab kawg.

Thaum txuas nrog koj yuav tsum pom ob qho hluav taws xob thiab tam sim no ntawm lub ntsuas vaj huam sib luag pem hauv ntej. Kho lub lauj kaub tam sim no nyob tom qab ntawm lub ntsuas vaj huam sib luag kom txog thaum nws nyeem tib yam li koj lub multimeter. Yog tias koj muaj ob metres, muaj ib qho los ntsuas tam sim no (hauv kab ntawv) thiab ib qho los ntsuas qhov hluav taws xob (ua ke).

Tam sim no koj zoo mus.

Kauj Ruam 10: Kev Xav Thaum Kawg

Thaum txhua yam haum rau hauv rooj plaub, Kuv tuaj yeem ua si ib puag ncig nrog kev teeb tsa sab hauv me ntsis thiab tej zaum tau hloov IEC lub qhov (socket) dhau los tso cai rau ob lub khoos phis tawj khoom siv los zaum 90 deg rau qhov lawv tam sim no. Cov txheej txheem yuav tsum tau tsom iav ib yam nkaus, raws li kuv ib txwm nyiam txhua yam mus los ntawm sab laug mus rau sab xis. Kuv tau suav nrog cov duab kos ntawm qhov muaj peev xwm uas kuv yuav tsum tau ua.

Kuv siv 7.5A 240VAC thaiv los ntawm cov hlua hluav taws xob (vim tias qhov kuv tau tso tseg ib puag ncig). Ua qhov no yog qhov chaw kaw, tej zaum kuv yuav tsum tau siv lub ntsuas qhov hnyav 240V xaim vim qhov phiaj xwm tsis kos ntau tam sim no.

Kuv kuj tsis tau pom tias ib qho ntawm cov ntaub ntawv ntsia hlau ncaj qha mus txog qhov hloov 240V. Hauv qhov rov qab los kuv yuav tsum tau hloov qhov hloov pauv me ntsis thiab tej zaum yuav tsum tau teeb tsa lub 240V fuse yas dhos rau ntawm lub vaj huam sib luag pem hauv ntej ib yam kom tsis txhob thaiv qhov tsis tsim nyog. Nrog me ntsis shuffling, Kuv tej zaum yuav tuaj yeem tso cov fuse tuav rau ntawm lub vaj huam sib luag pem hauv ntej ib yam, tab sis lub vaj huam sib luag pem hauv ntej twb muaj neeg coob heev.

Thaum kawg ntawm hnub ntawd, nws muab cov +/- 15V uas kuv xav tau, kho tau yooj yim, ntseeg tau thiab siv cov khoom uas npaj tau.

Cov haujlwm yav tom ntej

Kuv kuj tseem tau txais lwm qhov 0-30V/3A fais fab mov hauv kev ua haujlwm, txawm hais tias qhov no yuav xaus li ob qhov khoom siv sib cais (dua nyob ntawm qhov sib nrug). Qhov no muaj cov yam ntxwv tam sim no tas li. Kuv yuav cov laug cam no tib lub sijhawm vim kuv tsis tuaj yeem txiav txim siab qhov twg kuv xav tau yog li kuv tau txais ob qho tib si!

Kuj tseem yuav yog leej niam ntawm txhua qhov khoom siv hluav taws xob - ob lub zog qis/siab zog siv hluav taws xob siv ob lub rooj tswj hwm ib sab (4). Nws yuav hloov los ntawm qhov qis 0-30V mus rau qhov siab 30-90V thiab 5A! Qhov no yuav raug siv los ntsuas ob lub zog hluav taws xob lub zog ua kom muaj zog cov laug cam. Ib zaug ntxiv, nws yuav xaus li ob qhov khoom siv hluav taws xob cais nyob ntawm qhov sib nrug.