Mini FM Transmitter Module Wireless Microphone single Channel Board 3-5V 100mW Adjustable Sensitivity PLL 76.0MHz-108.0MHz

• Mob: Tshiab
• Yam: Logic ICS
• Tus qauv: Mini FM Transmitter Module
• Daim Ntawv Thov Kev Pab: Xov tooj txawb
• Kev khiav hauj lwm muaj kub: -20£70 celsius
• Mov Voltage: 3.0V-5.0V
• Pob: SOP
• is_customized: Yog
• Cov Lus Teb: 50Hz-18KHz
• tso zis fais fab tuag: 100nyuj

Taw qhia

1.tso zis fais fab tuag:100nyuj
2.Audio Frequency teb ntau yam:50Hz-18KHz
3.Kis tau tus kab mob frequency:76.0MHz-108.0MHz
4.Modulation Mode:txheej txheem FM
5.Suab khiav:ib zaug xwb channel
6.Hwj huam mov Voltage:DC 3.0V-5.0V
7.Kev Khiav Hauj Lwm Tam Sim No:35minyuam
8.Adaptive Antenna:75cm bar antenna
9.Hloov frequency command: AT+FRE=875 (rau 87.5 MHz)

10.Nyeem kom ua: AT+RET

Nta:

1. Adopt FM PLL Technique
2. Adopt Audio Low Noise operational Amplifier li microphone amplification
3. Hwj huam tawm nco yav dhau los frequency
4. Adopt High Precision SMD Quartz Crystal Stabilizing Frequency
5. PC chaw nres nkoj Configure Transmitting frequency los serial chaw nres nkoj

Qhia:

<1>: Hwj chim

Sab nraum qab ntawm lub module corresponds rau qhov chaw nres nkoj GND, thiab 3.7V yog txuas nrog cov tsis zoo thiab zoo terminals ntawm cov hwjchim mov (roj teeb) feem. Lub hwj huam mov yog pom zoo siv lub roj teeb los yog ib transformer step-down regulated hwj huam mov. Tsis txhob siv switching fais fab khoom siv tsis muaj filters (Xws li txawb xov tooj txawb chargers, ntug dej, switching DC-DC fais fab khoom siv), txwv tsis pub, Lub high-frequency cuam tshuam generated los ntawm cov hwjchim mov yuav muaj feem xyuam rau lub lag luam ntawm no module. Qhov chaw ua hauj lwm voltage ntawm no module yog 3.0-5.0V, thiab lub hwj huam mov voltage yuav tsum tsis tshaj no ntau yam.

<2>: Kav hlau txais xov

Qhov chaw nres nkoj ANT yog siv los txuas tus FM antenna. Thiaj li yuav zoo transmit FM teeb liab, Nws pom zoo kom txuas nrog ib 75cm-ntev nplawm antenna, Thiab yuav tsum muaj tsis obstacles kom deb li deb tau nyob ze lub antenna.

<3>: kev kho kom haum

Qhov module yuav tsum siv ib lub computer los configure nws xov tooj cua frequency taw tes (Xa mus rau qhov frequency configuration txoj kev nyob rau sab ib sab ntawm cov nplooj ntawv rau lub lag luam specific txoj kev zov me nyuam).

Matters xav tau xim:

1: Thov tshawb kom paub tseeb tias cov hwjchim mov polarity thiab hwj huam mov voltage yog tseeb ua ntej xa rau lub hwj huam. Yog hais tias cov input voltage tshaj 5V los yog tus ncej zoo thiab tsis zoo ntawm cov hwjchim mov muaj kev cob cog rua reversely, Nws yuav ua rau kom muaj kev puas tsuaj rau lub module.

2: Tsis txhob kov lub back components ntawm lub module thaum ua hauj lwm, Li ntawd, raws li tsis muaj feem xyuam rau lub lag luam ntawm lub module.

Modify lub microphone pickup sensitivity piav:

No module yuav hloov lub microphone pickup sensitivity los modifying tus tsis zoo feedback kuj ntawm lub microphone preamplifier circuit Court, Li ntawd, raws li cov adaptation ntawm cov neeg siv rau cov rhiab rhiab yuav tsum tau. Lub Hoobkas default tus nqi ntawm cov feedback tsis zoo kuj ntawm lub microphone preamplifier yog 82K ohms. Ua no kuj tsub kom cov sensitivity ntawm lub microphone thaum decreasing no kuj txo qhov rhiab ntawm lub microphone. Ceeb toom: Peb tsuas muab txoj kev hloov kho dua tshiab. Yog hais tias koj xav hloov nws, Thov yuav nws rov qab thiab hloov nws tus kheej. Tag nrho cov shipments yog raws li tus default sensitivity. Peb tsis hloov lub sensitivity parameters rau txhua tus neeg muas zaub.

Frequency configuration txoj kev thiab txheej txheem:

1: USB rau TTL module thiab cov module sib txuas txoj kev

(2): Txuas nrog lub USB rau qhov chaw nres nkoj serial module thiab cov module tom qab lub insertion ntawm USB serial module rau lub computer, Tos tus neeg tsav tsheb mus nruab nrab automatically tom qab lub plahaum yog kiag li qhib tus thawj tswj saib USB rau TTL module corresponding serial chaw nres nkoj