Cov kev daws teeb meem zoo tshaj plaws rau lub zog zaus converters
Tsis pom ntawm cov keyboard tom qab fais fab tuag
1. Tshawb xyuas seb lub hwj chim input puas zoo li qub. Yog tias nws zoo li qub, ntsuas seb qhov hluav taws xob ntawm P thiab N terminals ntawm DC tsheb npav yog qhov qub. Yog tias tsis muaj qhov hluav taws xob, txiav tawm lub hwj chim thiab xyuas seb lub charger puas puas lossis qhib.
2. Tom qab kuaj xyuas tias qhov hluav taws xob ntawm P thiab N terminals yog qhov qub, cov keyboard thiab keyboard cables tuaj yeem hloov tau. Yog tias tseem tsis muaj cov zaub, nws yog qhov yuav tsum tau tua hluav taws xob thiab xyuas seb 26P cable txuas rau lub rooj tsav xwm tswj lub ntsiab thiab lub rooj tsav xwm fais fab puas xoob lossis puas lossis qhib Circuit Court.
3. Yog tias qhov hloov hluav taws xob hloov ua haujlwm ib txwm ua tom qab lub hwj chim qhib, lub relay ua lub suab ntawm qhov nqus, kiv cua ua haujlwm ib txwm, tab sis tseem tsis tau pom, nws tuaj yeem txiav txim siab tias cov siv lead ua oscillator lossis resonant capacitor ntawm cov keyboard puas. Lub sijhawm no, cov keyboard tuaj yeem hloov lossis kho.
4. Yog tias txhua yam zoo li qub tom qab lub tshuab hluav taws xob, tab sis tseem tsis tau pom, qhov hloov hluav taws xob yuav tsis ua haujlwm. Lub sijhawm no, nws yog qhov tsim nyog los tua hluav taws xob thiab tshem tawm P thiab N terminals los xyuas seb lub xeev zoo li qub ntawm IC3845 puas zoo li qub (raws li kev paub). Yog tias IC3845 zoo li qub thiab qub, qhov hluav taws xob ntawm ob qho kawg ntawm 18V / 1W voltage regulator diode yog hais txog 8V tom qab siv DC voltage rau P thiab N, tab sis qhov hloov hluav taws xob tsis ua haujlwm. Tom qab fais fab tuag, xyuas seb puas muaj kev puas tsuaj lossis luv luv hauv lub rectifier diode ntawm ob sab ntawm qhov hloov pauv hloov.
5. Tom qab fais fab tuag, muaj qhov hluav taws xob ntawm 18V / 1W voltage regulator diode, tab sis tseem tsis muaj cov zaub. Koj tuaj yeem tshem tawm qee qhov txuas txuas txuas txuas txuas ntxiv, suav nrog cov xaim xaim xaim thiab cov kiv cua hlau ntsaws, thiab xyuas seb puas muaj qhov luv luv hauv kiv cua thiab relay.
Tom qab lub hwj chim ntawm P thiab N terminals, qhov voltage ntawm ob qho kawg ntawm 18V / 1W voltage regulator diode yog hais txog 8V. Siv lub oscilloscope los xyuas seb puas muaj cov sawtooth nthwv dej ntawm tus pin ④ ntawm qhov chaw tawm tswv yim ntawm IC3845 thiab seb tus pin ⑥ ntawm cov khoom siv hluav taws xob puas muaj cov zis.
7. Xyuas seb puas muaj qhov luv luv ntawm cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob hloov pauv ntxiv rau 5V, ± 15V, ntxiv rau 24V, thiab txhua lub zog hluav taws xob rau hauv av thiab ntawm cov ncej.
Cov keyboard qhia ib txwm, tab sis tsis tuaj yeem ua haujlwm
Yog hais tias cov keyboard pom ib txwm, tab sis tag nrho cov yuam sij ua haujlwm tsis tuaj yeem ua haujlwm, xyuas seb cov keyboard siv puas yog lub rooj tswj hwm lub ntsiab (txawm nws muaj IC75179). Rau cov tshuab uas muaj kev ua haujlwm sab hauv thiab sab nraud, xyuas seb lub xov tooj hloov txoj haujlwm koj tau teeb tsa puas yog.
2. Yog tias cov zaub zoo li qub, tab sis tsuas yog qee lub khawm tsis tuaj yeem ua haujlwm, koj tuaj yeem tshawb xyuas seb lub pob microswitch puas ua haujlwm.
