DIY Over-Current Protection: 4 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:27

Taw qhia

Raws li tus pib hauv cov khoom siv hluav taws xob, koj zoo nkauj txwv thaum nws los txhawb koj li kev tsim hluav taws xob tshiab. Tam sim no, qhov ntawd yuav tsis muaj teeb meem yog tias koj ua yuam kev kiag li. Tab sis, cia peb fim nws tias nws tsis tshua muaj neeg pom. Yog li, tsis muaj teeb meem txawm tias koj cuam tshuam qhov kev sib txuas ntawm sab tso tawm ntawm koj tus IC lossis koj sib xyaw cov polarity ntawm koj lub capacitor ib yam dab tsi yuav raug rhuav tshem vim tias koj lub zog siv hluav taws xob yuav tso tawm cov hluav taws xob dhau raws li nws tau teeb tsa qhov teeb meem tsis muaj teeb meem. Dab tsi yog ib qho kev daws teeb meem no yog siv lub zog hloov pauv lub rooj zaum nrog lub zog txwv tam sim no kom peb tuaj yeem tiv thaiv qhov dej ntws loj thaum muaj qhov yuam kev tshwm sim tab sis cov ntawd zoo nkauj heev. Pom tseeb, qhov no tsis siv tau thaum koj tsim lub roj teeb uas ua haujlwm. Hauv txoj haujlwm no, kuv yuav qhia koj yuav tsim lub voj voog yooj yim uas txuas rau ntawm koj lub zog siv hluav taws xob thiab koj cov khoom siv hluav taws xob thiab yuav cuam tshuam cov dej ntws tam sim no thaum twg los txog rau tam sim no.

Kauj Ruam 1: Yam Koj Xav Tau

2 x LM358P:

• 1 x Tsis-Latching Relay 12VDC:
• 1 x 0.5 Ohm Maas Resistor:
• 1 x Tactile Hloov:
• 1 x Ntsuab LED:
• 2 x 20k Ohms Resistors:
• 1 x 10k Ohms Variable Resistor:
• 1 x 1N4007 Diode:
• 2 x Cov Txuas Txuas Txuas:
• 1 x IC Socket:

Kuv tau siv cov khoom siv hluav taws xob los ntawm LCSC.com. LCSC muaj kev mob siab rau muab kev xaiv dav ntawm cov khoom siv hluav taws xob zoo tshaj plaws ntawm tus nqi zoo tshaj. Sau npe hnub no thiab tau txais $ 8 tawm ntawm koj thawj daim ntawv xaj.

Kauj ruam 2: Ua haujlwm ntawm Circuit

Thawj qhov peb xav tau rau cov kab hluav taws xob yog qhov txuas uas suav nrog cov kauj thiab hloov pauv kev sib cuag uas txhais tau tias thaum tsis muaj hluav taws xob tau thov rau lub kauj. Thaum tsawg kawg 3.8V tau thov rau lub kauj, cov neeg sib tham qhib/kaw. Tam sim no, peb tuaj yeem siv ib qho ntawm cov kev sib pauv hloov thaum tsis muaj tam sim no thiab qhib cov neeg sib cuag thaum nws dhau-tam sim no. NPN-transistor tau siv ua ntu rau lub kauj nrog rau 1k Ohms resistor nruab nrab ntawm cov khoom siv hluav taws xob thiab lub hauv paus ntawm transistor.

Tam sim no, yog tias qhov hluav taws xob tau siv rau hauv Circuit Court, tam sim no yuav ntws los ntawm transistor uas pib ze rau nws yog txoj hauv kev sib sau ua ke. Yog li ntawd, lub kauj tau muaj zog thiab cov neeg raug kaw. Tau kawg, peb yuav tsum tsis txhob hnov qab ntxiv cov flyback diodes los tiv thaiv qhov hluav taws xob ntau dhau ntawm tus neeg sau khoom. Kom pom qhov muag pom tias tsis muaj teeb meem dhau tam sim no, Kuv nyiam siv lub LED ntsuab nrog qhov txwv tam sim no.

Txhawm rau tshem tawm qhov kev xa tawm yog tias muaj teeb meem tshwm sim, peb tuaj yeem ntxiv NPN transistor thib ob rau lub hauv paus ntawm thawj lub transistor, Yog tias lub teeb liab yuam kev tau thov rau lub hauv paus ntawm qhov thib ob thiab yog li, cov kauj yuav deactivate, LED yuav tua thiab cov neeg sib tham yuav qhib txhawm rau txheeb xyuas qhov tam sim no. Txawm hais tias peb xav tau tus nqi qis zog tiv thaiv zoo li 0.5 ohms 5-watt resistor. Los ntawm kev ntxiv yooj yim ntxiv nws hauv kab nruab nrab ntawm cov khoom siv hluav taws xob thiab thawj qhov kev sib txuas lus sib txuas, nws tsim qhov hluav taws xob poob qis piv rau qhov ntws tam sim no tab sis txij li qhov kev poob qis no tsawg dua, peb thawj zaug yuav tsum tau siv Op-Amp hauv kev teeb tsa qhov sib txawv sib txawv.

Txhawm rau kom tau txais qhov hluav taws xob loj dua uas peb tuaj yeem ua haujlwm nrog lub teeb liab no txuas mus rau qhov tsis hloov pauv ntawm qhov thib ob op-amp uas nws cov tswv yim hloov pauv tau txuas ncaj qha rau lub zog. Los ntawm kev kho lub hwj chim, peb tuaj yeem tsim qhov sib txawv siv qhov hluav taws xob thiab vim tias op-amp ua raws li kev sib piv, nws cov zis yuav raug rub siab yog tias qhov kev nkag siab tam sim no siab dua qhov ntsuas hluav taws xob. Qhov no ua rau cov txiaj ntsig tau kawg txuas mus rau lub hauv paus ntawm ob lub transistor los ntawm tus tiv thaiv hauv qhov tig ntawm qhov txuas txawm tias dhau tam sim no.

Thaum cov relay tsis tau qhib dua, cov dej ntws tam sim no txo qis ntawm cov khoom sib piv thiab yog li ntawd cov relay tau qhib ib zaug. Tab sis txij li qhov dhau los yuav rov ntws dua thaum qhov kev sib txuas tau qhib, tus sib piv ua rau ib zaug ntxiv thiab lub voj voog rov ua dua. Ib zaug ntxiv txhawm rau kho qhov no peb tuaj yeem txuas tus tiv thaiv, ib txwm kaw lub pob thiab lwm yam tseem tsis tau siv ib txwm kaw kev sib cuag ntawm kev xa xov hauv koob rau lub hauv paus ntawm lub transistor thib ob. Tam sim no, thaum quav tshwm sim, kev xa xov tseem yuav kaw, tab sis txij li ib txwm kaw kev sib cuag ntawm kev xa xov tam sim no tau pom tseeb. Lub hauv paus ntawm transistor tseem raug rub mus rau qhov muab hluav taws xob txawm hais tias qhov sib piv tso tawm tau tso qis li no. Cov relay nyob qis qis kom txog rau thaum kev hloov pauv tactile raug thawb thiab yog li cuam tshuam qhov pib tam sim no ntawm ob lub transistor uas yog li ntawd tso cai rau kev xa rov qab kom rov ua haujlwm dua. Yog li tam sim no peb paub yuav ua li cas Circuit Court ua haujlwm!

Kauj Ruam 3: Txuas thiab Xeem Nws

Tom qab koj txuas tag nrho cov khoom siv hauv Circuit Court raws li cov lej, nws yog lub sijhawm los pib ntsuas thiab ntsuas ntsuas lub Circuit Court.

Nco tseg: Los ntawm kev kho qhov ntsuas hluav taws xob tsis raug, cov kab hluav taws xob no tsis cuam tshuam qhov ntws tam sim no tab sis thaum peb txo qis qhov ntsuas hluav taws xob mus rau tus nqi tsim nyog, Circuit Court cuam tshuam qhov tam sim no yam tsis muaj teeb meem thiab tseem tuaj yeem rov ua haujlwm tau yooj yim los ntawm kev siv lub khawm.