Latching Momentary Hloov rau ATX PSU Conversion: 4 Cov Kauj Ruam

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

Dab tsi? Kuv hnov koj hais! Ib ntus hloov uas yog latching? tej yam zoo li no ua tsis tau, muaj tseeb

Tab sis nws yog. Kuv pom tus qauv tsim hauv net thiab kho nws me ntsis kom yog tias txuas nrog ATX psu nws yuav hloov mus rau qhov chaw raug yog tias PSU kaw nws tus kheej, uas yog tus cwj pwm koj tau txais nrog PC lub zog hloov.

Txoj haujlwm no tau los rau hauv lub neej vim tias kuv tau ntxhov siab uas tau nias lub hwj huam khawm ob zaug tom qab ua yuam kev tsis txaus, uas ua rau nws raug kaw.

Teeb meem

• Kev hloov pauv ATX PSU zoo heev, tab sis koj yuav tsum muaj lub latching hloov kom qhib nws. Tej zaum koj twb paub lawm tias kev hloov pauv ntawm PC yog ib ntus, yog li qhov tseeb no hauv thiab ntawm nws tus kheej yog qhov nyuaj me ntsis. Yog li peb bung nyob rau hauv lub latching hloov thiab nyob nrog nws.
• Cov hloov pauv zoo nkauj, xws li "tus tim tswv lub qhov muag" ib qho uas tau qhia ntawm no raug nqi ntau dua hauv qhov latching version dua li lawv ua nyob rau ib ntus, vim tias lawv nyuaj dua. Yog li txoj hauv kev siv lub sijhawm hloov pauv yog qhov tsim nyog rau qhov laj thawj no.
• Lwm qhov laj thawj nws yog qhov xav tau yog tias latching keyboards muaj qhov sib txawv hauv qhov qhib lossis kaw txoj haujlwm. Momentary hloov pauv ib txwm rov qab zoo li qub thaum koj nias lawv.
• Qhov laj thawj kawg qhov hloov pauv ib ntus yog qhov xav tau yog qhov no. Thaum koj yuam kev luv lub davhlau ya nyob twg ntawm koj ATX PSU nws kaw nws tus kheej. Yog li tam sim no nrog lub latching hloov koj yuav tsum tua nws, txawm tias nws tau muab nws tus kheej tua, ua ntej koj tuaj yeem qhib nws dua. Nrog qhov hloov pauv ib ntus, koj yuav tsum muaj peev xwm tsuas yog nyem qhov hloov ib zaug, thiab tawm mus ntxiv.

Kuv ua raws txoj haujlwm no ntawm cov txheej txheem pom ntawm no: https://www.smallbulb.net/2014/435-single-button-p… thiab ntawm no: https://sound.whsites.net/project166.htm Muaj ntau qhov sib txawv ntawm tus tsim thoob plaws lub vev xaib.

Lub Circuit Court yog qhov yooj yim, thiab pheej yig heev los tsim. Cov vis dis aus tsuas yog los qhia nws tig PSU rau thiab tua, thiab rov pib dua nws tus kheej thaum PSU txiav tawm. Qhov kuv tsis nco qab qhia yog tig nws dua tom qab txiav tawm!

Kauj Ruam 1: Nws Ua Haujlwm Li Cas

Lub Circuit Court tso siab rau 555 timer

Cov lus piav qhia hauv qab no hais txog lub sijhawm suav hais tias yog nws yog cov khoom siv bipolar, txawm li cas los xij CMOS ib qho yog qhov tseem ceeb ib yam, koj tsuas yog yuav tsum nyeem "tus sau" raws li "ntws". Thov xa mus rau 555 daim duab sab hauv thaum nyeem cov lus piav qhia no.

Daim ntawv ceeb toom tias qhov pib thiab tus pin txuas tau txuas ua ke. Lawv tau tuav ntawm me ntsis qis dua ib nrab ntawm qhov muab hluav taws xob los ntawm R1 thiab R2. Qhov tseeb qhov hluav taws xob tsis tseem ceeb, tab sis nws yuav tsum nyob nruab nrab ntawm 1/3 thiab 1/2 Vcc. Qhov ib txwm muaj ntawm qhov Circuit Court no muaj nws ntawm 1/2 Vcc tab sis qhov ntawd yuav tsis ua haujlwm rau txoj hauv kev siv ntawm no los pib lub Circuit nrog cov zis siab.

C1 ua kom ntseeg tau tias kev siv hluav taws xob txuas nrog cov zis hauv lub xeev siab los ntawm kev rub cov tswj hluav taws xob tus pin siab thaum nws tau txais lub zog los ntawm cov xov hlau tos. Qhov no xav tau vim tias ATX PSU xav kom cov xaim hluav taws xob raug rub qis kom thiaj li qhib tau. Nws ua haujlwm vim tias nws nce qhov ntsuas hluav taws xob sab hauv ntawm "ua kom sib piv" rau 1/2 vcc, me ntsis siab dua qhov teeb tsa los ntawm R1 thiab R2. Qhov no ua rau tus sib piv rub tawm sab hauv flip-flop's "teeb tsa" cov tswv yim siab. Nws tsis muaj kev cuam tshuam rau "qhov pib" sib piv vim tias qhov kev siv twb tau siab dua tus lej pib nkag lawm.

ATX hloov cov tswv yim (ntsuab) txuas nrog tus pin tso tawm ntawm lub sijhawm ntau dua li qhov tso tawm, vim nws xav tau rub tawm los qhib, tsis yog siab lossis qis nkag. Qhov tam sim no yog qhov me me yog li nws yuav tsis ua mob rau qhov tso tawm transistor.

Yog li pib nrog, pwr_ok cov tswv yim yog ntawm 0v, thiab lub Circuit Court tau siv los ntawm qhov hluav taws xob tos, uas yog 5v. Qhov hluav taws xob no nyob rau txhua lub sijhawm tsis hais seb PSU tau qhib lossis tua. Cov zis tawm ntawm 5v thiab cov transistor tso tawm tau muab tua, yog li ATX hloov cov tswv yim kuj tseem zaum ntawm 5v. Lub pwr ok teeb liab mus siab thaum cov khoom siv tau npaj siv, thiab mus qis heev sai yog tias cov khoom poob tawm ntawm qhov tshwj xeeb.

Thaum koj nias lub pob, hauv lub xeev no, lub sijhawm ua haujlwm pib thiab pib pins raug rub mus txog 5v. Qhov no tsis muaj kev cuam tshuam dab tsi rau tus pin txhais tes, uas twb tau siab dua qhov ua rau qhov hluav taws xob. Tab sis nws cuam tshuam rau tus lej pib, uas tau tuav qis dua qhov pib qhov hluav taws xob. Sab hauv flip-flop cov lus rov pib ua haujlwm tau qhib, thiab qhov no yog qhov ua rau cov zis ntawm 555 mus qis thiab qhov tso tawm transistor tus sau ua ib txoj hauv kev rau hauv av.

4.7uF capacitor, C2, tau them qeeb ntawm lub zog pib ntawm 220k resistor, R3. Nws yog lub tshuab hluav taws xob no uas muab lub zog los rub lub chaw pib thiab tso pins siab, lossis muab txoj hauv kev luv luv rau hauv av kom rub lawv qis. Lub tshuab hluav taws xob no pab tshem tawm qhov ua tsis raug ntawm Circuit Court vim nws siv sijhawm li ib pliag los them lossis tso tawm, yog li koj tsis tuaj yeem tig cov khoom siv tawm thiab tawm sai heev.

Yog li tam sim no cov zis tau qis thiab ATX PSU tau qhib.

Tom ntej no, koj tau ua tiav kev sim thiab koj nias lub pob dua. Lub sijhawm no C2 nyob rau hauv lub xeev tso tawm, yog li 0v txuas nrog rau qhov pib thiab ua rau tus pin. Qhov no tsis muaj kev cuam tshuam rau tus lej pib, uas twb tau tuav qis dua qhov pib qhov hluav taws xob. Tab sis nws cuam tshuam rau tus lej pin, uas tau tuav saum toj ntawm qhov ntsuas hluav taws xob. Sab hauv flip-flop cov txheej txheem teeb tsa tau qhib, thiab yog li 555 qhov tso tawm mus siab thiab tso tawm transistor tus neeg khaws khoom dhau los ua qhov qhib Circuit Court, tua PSU.

Piv txwv tias thaum koj tab tom sim, Tej Yam Mus Tsis Txaus Ntshai thiab koj luv luv tso tawm ntawm PSU, uas tom qab ntawd kaw nws tus kheej kom tiv thaiv kev puas tsuaj.

Hauv nws daim ntawv qub, lub voj voog no tseem yuav nyob hauv "ntawm" lub xeev, zoo li lub latching hloov, raws li nws lub zog hluav taws xob los ntawm cov khoom siv tos tau tas li. Nws yuav tsum muaj lub teeb liab ntxiv kom nws tua.

Txhawm rau ua kom tiav qhov no, ib khub niam txiv ntxiv lub PWR_OK tso tawm ntawm PSU mus rau qhov pib thiab ua rau tus pin. Txoj kev no, thaum PSU kaw nws tus kheej, nws rub ob lub pins qis luv luv, thiab teeb tsa cov zis siab.

Raws li kuv pom tau, qhov no yog tib txoj hauv kev ua rau PSU kaw nws tus kheej thiab tseem toggle qhov hloov no. Yog tias nws tsis ua haujlwm rau koj, sim nce tus nqi ntawm C3. Yog tias nws tseem tsis ua haujlwm, koj yuav tsum txiav txim siab txuas ib lub voj voog monostable ntawm C3 thiab ua ke ua ke thiab tus lej pib.

Thaum kawg, qhov ntsuas qhia pom tias PSU tau qhib. Vim tias qhov hloov pauv ib ntus yog qhov pheej yig dua, nws yooj yim kom muaj lub teeb pom kev zoo zoo li qhov no, txawm tias ntawm pob nyiaj siv nruj! LED cathode mus rau 0v. LED hauv qhov kev hloov pauv no tau tsim ua tam sim no txwv kev tiv thaiv, yog li cov anode tuaj yeem mus ncaj rau 5v. Rau tus qauv LED tab sis, koj yuav tsum suav nrog qhov txwv tam sim no. 390 ohms yog tus nqi pib zoo, koj yuav xav sim nce siab lossis qis dua kom koj tau txais qhov ci uas koj nyiam.

Kauj Ruam 2: Daim Ntawv Teev Npe

Koj xav tau:

• Ib qho kev hloov pauv ib ntus. Qhov kuv tau txais muaj qhov ua rau tam sim no txwv resistor rau nws yog LED. Hom no tau teev tseg raws li "tus tim tswv qhov muag" ntawm eBay. Nws tsis tas yuav yog lub teeb pom kev zoo, nws tsuas yog zoo nkauj.
• 555 hnub tim. Kuv siv SMD version yog li kuv tuaj yeem ua lub rooj tsavxwm kom haum los ntawm qhov hloov qhov txuas qhov.
• 33k tiv
• 27k tiv
• 220k resistor (tuaj yeem hloov kho lub sijhawm ncua)
• 1 uF capacitor
• 100nF capacitor (tej zaum yuav xav tau hloov rau tus nqi loj dua)
• 4.7uF capacitor (tuaj yeem hloov kho kho lub sijhawm ncua)
• PCB ua cov ntaub ntawv, lossis pawg thawj coj saib.

Kuv tau txais qhov hloov ntawm eBay. Kuv twb muaj cov khoom ntawm 555 timers, thiab lwm yam khoom siv tau dawb.

Kauj Ruam 3: Kev tsim kho

Kuv ua tus qauv ntawm lub Circuit Court ntawm ib daim ntawm perforated board. 555 lub sijhawm yog SMD nti. Kuv nyuam qhuav zaum nws rau saum daim kab xev "Koptan" (pheej yig dua li daim kab xev Kapton!) Lwm cov khoom kuv txuas nrog cov hlau nplaum zoo. Yog tias koj lees txais qhov kev tsim kho no nws yooj yim dua rau siv DIL cov cuab yeej, tsis yog SMD, txawm hais tias!

Kuv xav kom PCB tuaj yeem txuas mus tas li mus rau qhov hloov pauv thiab dhau los ntawm qhov hloov pauv qhov. Vim li no kuv tau ua lub rooj tsavxwm 11mm dav los ntawm 25mm ntev. Nws tau muab nrog cov davhlau ya nyob twg rau kev hloov pauv kev sib cuag thiab ua hauv LED. Kuv teeb xaim "tails" thiab muab tus pin txuas rau lawv kom yooj yim ntawm kev txuas mus rau PSU. Kuv thov heatshrink tubing los tuav cov xov hlau ua ke thiab npog lawv cov kev sib txuas rau lub taub hau.

Yog tias koj siv lwm hom kev hloov pauv koj yuav pom tias nws yuav tsis haum rau hauv txoj kev no.

Kuv tau ua qhov yuam kev loj heev thaum kuv ua lub rooj tsavxwm, Kuv tsim daim iav daim duab version! Luckily vim hais tias lub Circuit Court yog yooj yim heev kuv tsuas xav tau kom haum 555 lub timer upside down los kho qhov teeb meem. Kuv vam tias koj yuav tsis ua kuv qhov yuam kev, thiab tau txais lub rooj tsav xwm kom raug. Cov PDFs yog rau sab saum toj tooj liab.

Muaj ntau cov lus qhia los ua PCBs, Kuv txawm sau ib tus kheej! Yog li kuv yuav tsis nkag mus yuav ua li cas thiaj ua tau lub rooj tsavxwm, ntawm no.

Muab cov nti tso rau hauv qhov chaw ua ntej. ua kom ntseeg tau tias koj tau txais kev qhia kom raug. Tus Pin 1 mus deb ntawm kab ntawm cov neeg tawm tsam nqes ib sab. Solder lwm yam ntu ntu ntu txuas ntxiv.

Kuv siv lub hau hluav taws xob rau C2 vim tias kuv tsis muaj 4.7uF ceramic ib.

Koj muaj ntau txoj kev xaiv rau C2:

• Tsawg profile capacitor, tsis ntau tshaj li 7 hli siab
• Haum lub capacitor nrog cov coj ntev yog li koj tuaj yeem tso nws ncaj rau ntawm lub rooj tsavxwm
• SMD capacitor ntawm qee yam
• Tantalum capacitor, uas yog me me lawm. Nco tseg cov style ntawm polarity npav yog txawv rau hom aluminium

Nws tsuas yog nyob ntawm seb koj muaj dab tsi.

Xyuas kom tseeb tias lub rooj tsavxwm yuav haum los ntawm cov hloov pauv ntsaws. Yog tias koj siv lub hau hluav taws xob rau C2, kos nws yuav haum nrog daim ntawv txuas no. Kuv chamfered cov npoo ntawm lub rooj tsavxwm kom tau txais qhov chaw ntxiv me ntsis.

Tom ntej no, txuas lub rooj tsavxwm mus rau qhov hloov pauv siv 2 lub pawm loj ntawm qhov kawg. Koj tuaj yeem txiav qhov qhib hauv cov ntaub qhwv thiab faus qhov hloov chaw nyob hauv lawv, yog tias koj xav tau kom tau lub rooj tsavxwm ze rau ntawm qhov nruab nrab ntawm qhov hloov pauv, tab sis kuv tsis xav kom nws. Lwm qhov kev xaiv yog txhawm rau txhawm rau hauv cov pawm thiab haum cov pins uas koj tuaj yeem muab qhov hloov pauv rau ntawm qhov tiaj tiaj ntawm lub rooj tsavxwm. Siv qhov ntev luv ntawm cov hlau ruaj khov los txuas cov dav hlau LED. Tsuas yog muab tshuaj txhuam rau lawv, tsis txhob qhwv lub davhlau ya nyob twg zoo li koj yuav pom tias koj xav tau txuas nws. Yog tias koj lub teeb pom kev zoo tsis muaj lub tshuab ua hluav taws xob, hloov ib qho ntawm cov xov hlau nrog ib qho.

Thaum kawg, yog tias siv tus pin taub hau lossis lwm hom txuas xws li JST, muab cov no tso rau qhov chaw tam sim no. Yog tias tsis yog, haum qhov hloov pauv hauv nws lub qhov ntsaws thiab muab cov xov txuas ncaj qha rau ntawm lub rooj tsavxwm yog tias koj tsis tau haum cov xov hlau.

Kauj ruam 4: Thaum kawg

Txoj hauv kev zoo tshaj plaws los ntsuas qhov hloov pauv yog los ntawm kev txuas mus rau ATX PSU. Yog tias koj tsis tau npaj ib qho, koj tseem tuaj yeem sim nws, saib hauv qab no.

Txuas tus:

• xaim dub ntawm ATX PSU rau gnd
• ntsuab PS_ON xaim rau "qhib lub zog"
• ntshav +5VSB xaim rau "5v tos" (xaim yuav tsis yog ntshav)
• grey PWR_ON xaim rau "pwr_ok" (xaim yuav tsis txho)

Cov kab txaij thiab xim liab tau thim rov qab ntawm kuv ATX PSU - ib yam dab tsi los saib!

Yog tias koj tab tom txiav txim siab siv lwm qhov taw qhia uas tsis yog LED me me li koj qhov "ntawm" qhov ntsuas, koj yuav tsum txuas nws mus rau ib qho ntawm PSU cov txiaj ntsig tseem ceeb, tsis yog PWR_ON teeb liab.

Yog tias koj pom lub LED rub tawm PWR_ON qhov hluav taws xob ntau dhau, siv +5v hloov chaw.

Thaum koj pib ua haujlwm rau nws, koj yuav tsum tau tos ib pliag ua ntej qhov kev hloov pauv yuav ua haujlwm. Qhov no yog txhob txwm tshaj tawm thiab ntxiv rau de-bouncing hloov, yog npaj kom nres cov ntiv tes tsis zoo los ntawm kev siv hluav taws xob nrawm nrawm txawm tias qhov hloov pauv tshwm sim los txuas nrog. Thaum qhov hloov pauv tau qhib, koj yuav tsum tau tos lwm thib ob ua ntej koj tuaj yeem kaw nws dua.

Koj tuaj yeem hloov qhov kev ncua no los ntawm kev hloov tus nqi C2 lossis R3. Halving tus nqi ntawm ib qho kev tivthaiv yuav ua rau ncua sijhawm ib nrab, tab sis kuv yuav tsis teev nws tsawg dua li 200mS.

Txuas PSU mus rau lub ntsiab. Nws yuav tsum nyob twj ywm. Yog tias nws hloov tam sim ntawd, koj yuav tsum nce tus nqi ntawm C1. Qhov txaus siab, Kuv pom lub Circuit ua haujlwm raug hauv tus qauv, tab sis kuv xav tau hloov pauv lub capacitor rau "tiag" version, yog li tam sim no nws yog 1uF tiag.

Fais fab mov rau, fais nws tawm dua. Vam tias nws ua haujlwm kom deb li deb! Hwj chim nws dua, thiab tam sim no luv Circuit Court +12v tso tawm ntawm PSU rau 0v. Nws yuav tsum tua nws tus kheej, thiab qhov hloov pauv yuav tsum hloov mus rau qhov teeb tsa ib yam nkaus. Yog tias koj xav tau nyem lub pob ob zaug kom tig PSU rov qab, nws tsis ua haujlwm thiab koj yuav tsum taug qab qhov teeb meem.

Tsis txhob sim luv luv txoj kab +5v kev tsheb nqaj hlau, koj yuav pom nws yaj koj cov hlau tsis txhob txiav tawm.

Yog tias koj xav tau ntsuas qhov hloov pauv yam tsis muaj ATX PSU, koj xav tau 5v mov los ua li ntawd

Txhawm rau sim nws li no, txuas:

• 0v ntawm cov khoom siv rau gnd
• +5 ntawm cov khoom siv rau 5v tos
• LED nrog tam sim no txwv kev tiv thaiv nruab nrab ntawm +5 thiab "lub zog rau"
• 10k resistor los ntawm pwr_ok rau +5v
• kev xeem ua rau "pwr_ok"

LED yuav los thaum lub sijhawm ua haujlwm qis, uas yog piv rau tig rau ATX PSU.

Kev ntsuas luv luv ua rau 0v. Qhov hloov yuav tsum tua. Qhib nws dua los ntawm nias lub pob thib ob tom qab.

Thiab qhov ntawd yog nws, sim ua tiav!