FM Transmitter Tsim: 3 Kauj Ruam (nrog Duab)

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

Ua tibzoo saib ntawm PCB thiab Schematic muab rau hauv qab no

Kauj Ruam 1: Saib ntawm PCB thiab Schematic Muab Hauv qab no:

Lub electret mike suav nrog tam sim no ntawm 200uA uas hloov los ntawm +- 3uA kev twv ntawm lub suab tsis. Qhov no teeb tsa qhov hluav taws xob hla R1 txog 2V thiab yog li qhov hluav taws xob hla lub mic mus rau plaub volts. Vim tias lub suab tsoo lub mic no los ntawm R1 yuav nce me ntsis txo qhov hluav taws xob hla lub mic. Puas yog qhov tshwm sim?

Qhov ntsuas hluav taws xob zoo no tau dhau los ntawm lub hau txuas, C1 mus rau hauv qab ntawm lub tshuab hluav taws xob hluav taws xob, uas yog kev ntxub ntxaug los ntawm R2 & R3 rau kwv yees li 2V. Qhov hluav taws xob hla R4 yam tsis muaj teeb liab ntawm lub mic yog Vb - zero.7 (poob hla vbe), 1.3 volts. Vim tias qhov ntsuas hluav taws xob ntawm b kev hloov kho R4 tuaj yeem hloov pauv los ntawm qhov zoo ib yam. Qhov kev hloov pauv hauv qhov hluav taws xob tau pom hauv qab ntawm cov hluav taws xob Circuit Court. Thiab yog li cov cim hluav taws xob tau nce/poob. Yog tias koj ua tib zoo txheeb xyuas PCB thiab yog li cov txheej txheem, koj yuav pom tias cov pins ntawm PCB tau ua kom pom tseeb los tsim cov txheej txheem sib dhos yooj yim dua. Tag nrho cov ntsiab lus tseem ceeb tau sau kom raug.

Daim Ntawv Teev Npe Yuav Tsum Tau Ua rau Txoj Haujlwm · Microphone

· Transistor-S9018

· R1- 2.2k · R2- 22k

· R3 - 2.2k · R4 - 33ohms

· R5- 33ohms · C1- 0.1uF

· C2 - 0.1uF

C3 - 680pF

· C4 - 30pF

· C5 - 10pF

· C6 - 30pF

· C7- 30pF

· C8 - 0.1pF

· L1 - 0.1uH

· 3V - 9V Roj teeb

· Kav hlau txais xov

Kauj ruam 2:

Kauj Ruam 1: Thawj Siv Cov Khoom Siv Hluav Taws Xob. Txhim kho tag nrho lawv ntawm lub rooj tsavxwm. Ua raws daim ntawv lo ntawm cov khoom siv ntawm PCB tsim los ntawm wellpcb.com

Kauj Ruam 2: Kuj txhim kho txhua tus tiv thaiv tom qab kho lub capacitors raws li qhia hauv daim duab hauv qab no.

Kauj Ruam 4: Txhim kho 5.5 tig inductor kauj raws li qhia hauv qab no

Kauj Ruam 5: Electret Microscope

Thov ceeb toom ntawm PCB xaj los ntawm www.wellpcb.com tias muaj lub cim nrog 3 kab (rau tus lej tsis zoo) ntawm mike silkscreen. Lub cim tau raug tsim los tsim cov txheej txheem nrawm dua. Yog tias koj hla kev txheeb xyuas qhov tseeb electret mike, koj yuav pom cov cim zoo sib xws. Yog li, koj tsuas yog yuav tsum tau sib phim qhov ntawd thiab siv lub tshuab mike.

Kauj ruam 3:

Lub cim (cov laug) txuas nrog lub tshuab electret microphone yog tus pin tsis zoo.

Kauj Ruam 6: Kho tus kav hlau txais xov (ANT) thiab lub zog muab txuas. Siv xaim xaim rau kav hlau txais xov, ib puag ncig 10cm-50cm ntev. Lub kav hlau txais xov ntev dua qhov kev sib kis nyob deb. Koj yuav siv 3V rau 9V roj teeb rau kev ua haujlwm ntawm cov khoom siv.

Yog li, yog tias koj tab tom nrhiav tiag tiag rau qee yam khoom tsim PCB hnyav thiab tshwj xeeb cuam tshuam nrog cov haujlwm saum toj no, tsuas yog mus ntsib www.wellpcb.com

Los ntawm: Shayankhan