I made SMD FM wireless microphone

I made SMD wireless microphone

Picture of FM wireless microphone

RF output waveform of FM wireless microphone

Comparison of SMD wireless microphone and Wumao coin

The minimum working voltage of the patch FM wireless microphone made this time is 2V, and the highest working voltage is 8V.

The oscillating circuit part adopts the LC oscillating circuit, and then performs power amplification after a primary buffer. So this circuit works relatively stably, even if you grab the antenna by hand, it will not run.

Main components:

SMD transistors use ultra-high frequency transistors 9018 (two), the first 9018 is used for oscillation, and the second 9018 is used for buffer amplification. This can reduce the pinch between the front and rear stages and make the circuit work more stable. There is also a patch transistor "RF86" the entire FM wireless microphone transmission distance depends on it, RF86 as the final power amplifier can get a relatively ideal output power.

SMD resistors and capacitors are packaged in 0805, which is easier when wiring and soldering the circuit.

Since I do not have a chip inductor on hand, I can only use ordinary coils. If I use a chip inductor, the circuit volume will be greatly reduced.

In-depth analysis of the first-level cache and second-level cache of the technical zone CPU eMMC mass burning dilemma, do you really know? Isolation flyback and non-isolated BUCK application design plan Schottky barrier diode selection and application guide How to use Altium in program design Designer puzzle?

Follow WeChat

Interesting and informative information and technical dry goods

Download Audiophile APP

Create your own personal electronic circle

Follow the audiophile class

Lock the latest course activities and technical live broadcast

comment

Publish

related suggestion

Simple wireless microphone circuit diagram (seven wireless microphone circuit diagrams)

This article introduces the circuit diagram details of seven wireless microphones. The Electronic Component microphone (microphone) on the Circuit Board first turns the natural sound signal into an audio electrical signal, ...

Published on 2018-01-25 16:35 â€¢ 1661 views

Simple wireless microphone circuit diagram (seven wireless microphone circuit diagrams)

Wireless microphone circuit design scheme summary (multiple circuit design principles in detail)

This article introduces the wireless microphone circuit design and schematic diagram. The wireless microphone circuit consists of a sound pickup circuit, a sound conversion circuit, a high frequency oscillator, and modulation ...

Published on 2018-01-25 15:14 â€¢ 501 times read

Wireless microphone circuit design scheme summary (multiple circuit design principles in detail)

9018 wireless microphone circuit diagram (four wireless microphone circuit diagrams)

This article introduces the circuit diagram of four 9018 wireless microphones. The wireless microphone is composed of several pocket transmitters (which can be installed in the pocket and the output power is about 0.0 ...

Published on 2018-01-25 14:13 â€¢ 576 times read

9018 wireless microphone circuit diagram (four wireless microphone circuit diagrams)

1.5v battery wireless microphone production (six wireless microphone circuit diagram production ...

The wireless microphone is composed of several pocket transmitters (which can be installed in the pocket and the output power is about 0.01W) and a centralized receiver. Each pocket sends ...

Published on 2018-01-25 13:40 â€¢ 908 views

1.5v battery wireless microphone production (six wireless microphone circuit diagram production ...

The difference between U-segment and V-segment wireless microphones and the better solution of U-segment than V-segment ...

The V segment does interfere with each other when multiple sets of wireless microphones are used. Of course, it cannot be said that the U segment does not, but it has a large extension range and can be adjusted as much as possible ...

Published on 2018-01-19 10:11 â€¢ 782 views

The difference between U-segment and V-segment wireless microphones and the better solution of U-segment than V-segment ...

bomo cloth wood T series one drag two wireless microphone

Published on 2017-11-14 09:50 â€¢ 327 views

What brand of wireless microphone is a good leading brand

Published on 2017-11-13 10:28 â€¢ 261 times read

Questions and answers about the use of infrared wireless microphones in KTV private rooms

Published on 2017-11-10 11:25 â€¢ 249 views

Under what circumstances will the KTV wireless microphone have acoustic feedback

Published on 2017-11-08 11:36 â€¢ 278 times read

Record directly from wireless microphone

Published on 2017-07-27 14:47 â€¢ 654 views

Matters needing attention in practical application of wireless microphone

In today's era of extremely rich material products and extremely active cultural life, many enterprises and institutions have many entertainment or group activities. in...

Posted at 2012-08-10 14:15 â€¢ 2357 views

Matters needing attention in practical application of wireless microphone

Engineer Electronic Production Story: Simple FM Wireless Microphone DIY Design

Every electronic lover has the experience of electronic production, from continuous failure at the beginning to gradual handy, the taste is beyond the reach of outsiders ...

Posted at 2012-03-12 14:06 â€¢ 4860 views

Engineer Electronic Production Story: Simple FM Wireless Microphone DIY Design

Circuit diagram of enhanced wireless microphone

R1 in the circuit diagram of the enhanced wireless microphone is the bias resistance of the microphone MIC, generally selected in 2K-5.6K. R4 is the collector resistance. Give here ...

Published on 2011-12-21 10:48 â€¢ 3939 views

Circuit diagram of enhanced wireless microphone

Realization of wireless microphone circuit

This article introduces in detail more than a few representative low-power transmitters in the 88 ~ 108MHz FM broadcast range that are easy to make in amateur situations ...

Posted at 2011-11-22 15:29 â€¢ 5745 times read

Realization of wireless microphone circuit

1.5V wireless microphone

The microphone works with a single tube, and the working voltage only needs 1.5V. The frequency is tuned in the FM band of 88 ~ 108MHz, and the ordinary FM radio is used ...

Posted at 2011-10-08 14:31 â€¢ 2304 times read

Practical test method of wireless microphone

Recently, some film and television sound workers have conducted detailed practical tests on several wireless microphones commonly used in daily work. The pickup of wireless microphone not only involves the distance ...

Published on 2011-02-14 11:42 â€¢ 3002 views

Practical test method of wireless microphone

Wireless microphone production circuit diagram

If your recorder has FM reception band, you may wish to make a wireless microphone yourself, which can add a lot of fun to your life.

Published on 2010-11-25 12:27 â€¢ 4291 times read

Wireless microphone production circuit diagram

Simple wireless microphone circuit diagram

Posted at 2010-08-25 22:21 â€¢ 2139 views

High-fidelity wireless microphone circuit diagram

The frequency changes. When assembling, the lead of the component should be soldered as short as possible.

Posted at 2010-08-25 21:59 â€¢ 824 views

High-fidelity wireless microphone circuit diagram

Circuit diagram of wireless microphone lever pointer

The wireless microphone rod pointer introduced in this article combines the FM wireless microphone and the portable rod pointer, and cleverly uses the metal part of the pointer as a word.

Posted at 2010-08-25 21:51 â€¢ 421 views

Circuit diagram of wireless microphone lever pointer

Manufacture of several wireless microphone circuits

The production of several wireless microphone circuits This article introduces in detail the representative ones that are easy to make successfully in amateur situations ...

Posted on 2009-12-24 09:07 â€¢ 2942 views

Manufacture of several wireless microphone circuits

Principle and circuit of KMW-306 channel wireless microphone

The principle and circuit of KMW-306 channel wireless microphone KMW-306 wireless microphone is a cost-effective electroacoustic used in karaoke and other dance halls ...

Posted at 2009-12-22 12:34 â€¢ 2099 views

Production of wireless microphone

The principle of wireless microphone production: The electronic component microphone (microphone) on the circuit board first turns the natural sound signal into an audio electrical signal, which ...

Posted at 2009-12-22 11:02 â€¢ 7270 views

Making wireless microphone and circuit with NAND gate circuit

The use of NAND gates to make wireless microphones and circuit wireless microphones can be seen everywhere on the market, but without exception, all use LC oscillators or quartz crystals ...

Posted at 2009-12-20 09:53 â€¢ 500 views

Making wireless microphone and circuit with NAND gate circuit

Wireless microphone circuit made by NAND circuit

The wireless microphone circuit made by the NAND gate circuit is available everywhere on the market, but the circuit is made of lc oscillator or quartz crystal oscillator circuit ...

Published on 2009-11-26 08:20 â€¢ 593 times read

Wireless microphone circuit made by NAND circuit

How to choose a wireless microphone

How to choose a wireless microphone Overview Due to the progress of today's radio communication technology, the quality and function of wireless microphone products have been relatively improved ...

Posted at 2009-10-22 21:13 â€¢ 2350 views

High-performance dual-band wireless microphone receiving circuit diagram

Published on 2009-10-20 11:34 â€¢ 1759 views

Circuit diagram of amplitude modulation wireless microphone

Published on 2009-04-14 09:43 â€¢ 1067 views

Make signal generator and wireless microphone with UPC1651

The circuit is shown in the figure, IC1, C1 form a low-frequency oscillator around 400HZ; IC2 ...

Posted on 2006-04-17 19:11 â€¢ 754 views

Make signal generator and wireless microphone with UPC1651

FM wireless microphone

Published on 2006-04-16 19:22 â€¢ 2823 times read

[Photo] Single tube wireless microphone

The circuit shown in Figure 1 can transmit audio signals to remote locations in a frequency-modulated (FM) manner.

Published on 2006-04-15 20:58 â€¢ 515 views

[Photo] upc1651 FM wireless microphone

Published on 2006-04-15 20:58 â€¢ 1065 times read

[Photo] Highly sensitive wireless microphone

Published on 2006-04-15 20:47 â€¢ 1246 times read

[Photo] 9018 wireless microphone

The wireless microphone circuit has a reasonable design, beautiful and elegant shape, long sound transmission distance, long service life, long ...

Published on 2006-04-15 20:45 â€¢ 890 views

[Photo] Wireless microphone

A few days ago, the price of a wireless microphone on the market was between 10 and 20 yuan. The microphone is adjusted ...

Published on 2006-04-15 20:45 â€¢ 740 views

[Photo] FM wireless microphone

The circuit is shown in the figure. This circuit uses Japanese NE ...

Published on 2006-04-15 20:44 â€¢ 328 times read

[Photo] Micro FM wireless microphone

Electricity

Posted at 2006-04-15 20:43 â€¢ 465 times read

var check_allow = "/d/Api/iscantalk.html"; var add_url = '/ d / article / write /'; function CheckLogin () {now_uid = ''; var ElecfansApi_checklogin = '/ webapi / passport / checklogin'; var logout_url = "{: U ('Login / logout')}"; var logout_url = 'http://bbs.elecfans.com/member.php?mod=logging&action=logout&refer=front'; $ .get (ElecfansApi_checklogin, function (data, textStatus) {if (data! = "") {EchoLoginInfo (data); CheckEmailInfo (data); data = $ .parseJSON (data); now_uid = data.uid; / * var login_content = 'write an article

'+ data.username +'

Quit '; * / var login_content =' write an article

'+ data.username +'

Set exit '; $ (' # login_area '). Html (login_content); var win_width = $ (window) .width (); if (win_width> 1000) {$ ("# mine"). MouseDelay (200) .hover (function () {$ ("# mymenu"). show ();}, function () {$ ("# mymenu"). hide ();});}} else {var content = 'Login Registration'; $ ('# login_area'). html (content); $ (". special-login"). click (function (e) {$ .tActivityLogin (); return false;});}});} $ (function () {// comment ------------------------------- var comment = $ ("# comment"); var comment_input = $ ("# comContent"); // Submit comment click event interaction $ ("# comSubmit2"). on ('click', function () {var content = comment_input.text (); // Empty input box comment_input. html (""). focus (); // Submit data to server $ .ajax ({url: '/plus/arcComment.php', data: {aid: $ ("# webID"). val (), dopost : 'apiPubComment', content: content}, type: 'post', dataType: 'json', success: function (data) {// Data format returned: if (data.status == "successed") {// Build temporary comment DOM var dom = ''; dom + = '

'; dom + =' '; dom + ='

'; dom + ='

'+ data.data.username +' '; dom + ='

'; dom + =' '+ content +' '; dom + =' '; dom + =' just now '; dom + =' '; dom + =' '; // insert a temporary comment to the list $ ("# comment ") .append (dom);} if (data.status ==" failed ") {// alert (data.msg); layer.msg (data.msg);}}}); return false;}); (function () {/ * * Insert single sign-on JS * / var setHost = 'https://passport.elecfans.com'; // Set domain name var script = document.createElement ('script'); script.type = 'text / javascript'; script.src = setHost + '/public/pc/js/t.passport.js'; script.setAttribute ("id", "sso_script"); script.setAttribute ("data-ssoSite", setHost); script.setAttribute ("data-ssoReferer", encodeURIComponent (location.href)); script.setAttribute ("data-ssoSiteid", "11"); var body = document.getElementsByTagName ("body"). item ( 0); body.appendChild (script);}) () / * * It is recommended to modify the style of the article without a picture * * / $ (". Article .thumb"). Each (function () {if ($ (this). find ('img'). attr ('src') == "") {$ (this) .find ('img'). remove (); $ (this) .parent (). css ('padding-left ',' 0px ');}}); / * Baidu share * / window._bd_share_config = {common: {bdText: '', // Custom share content bdDesc: '', // Custom share summary bdUrl: window.location.href, // Custom share URL address bdPic: ''} , share: [{"bdSize": 60, "bdCustomStyle": true}]} with (document) 0 [(getElementsByTagName ('head') [0] || body) .appendChild (createElement ('script')). src = 'http://bdimg.share.baidu.com/static/api/js/share.js?cdnversion=' + ~ (-new Date () / 36e5)]; var add_url = '/ d / article / write / '; // var check_allow = "{: U (' Api / iscantalk ')}"; var check_allow = "/ d / api / iscantalk"; var click_items_length = $ ('. art_click_count '). length; if ( click_items_length> 0) {var id_str = ''; $ ('. art_click_count'). each (function () {id_str + = $ (this) .attr ('data-id') + ',';}) // var url = "{: U ('Api / getclickbyids')}"; var url = "/ d / api / getclickbyids"; var id_data = 'id_str =' + id_str; $ .ajax ({url: url, data: id_data, type: 'post', dataType: 'json', success: function (re) {if (re.list.length> = 1) {var list = re.list; for (var i in list) {var t emp_id = list [i] ['id']; var temp_span = $ (". art_click_count [data-id =" + temp_id + "]") temp_span.html (list [i] ['click']);}} }})} $ ("# comContent"). click (function () {if (now_uid == '') {$ .tActivityLogin (); return false;}}) $ (function () {var follow_wrap = $ ( ".author-collect"); var now_uid = "{$ _super ['uid']}"; var face_src = "{$ _super ['uface']}"; var getFollowNum = $ (". followNum strong"). html (); // Follow $ (window) .on ('click', '.author-collect', function () {if (now_uid == '') {$ .tActivityLogin (); return false;} if ( $ (this) .attr ('id') == 'follow') {$ .post ('/ d / user / follow', {tuid: article_user_id}, function (data) {// Data format returned: if (data.status == "successed") {$ (". followNum strong"). html (++ getFollowNum); follow_wrap.html ('followed'). attr ('id', 'cancelFollow'). css ( 'background', '# 999'); var follow_user = ' '; $ (' # follow_list '). append (follow_user);} if (data.status == "failed") {alert (data.msg);}});} else {// Unfollow if ($ ( this) .attr ('id') == 'cancelFollow') {$ .post ('/ d / user / cancelFollow', {tuid: article_user_id}, function (data) {// Data format returned: if (data .status == "successed") {follow_wrap.html ('Follow'). attr ('id', 'follow'). css ('background', '# f90'); $ (". followNum strong"). html (-getFollowNum); $ ('# follow_list .face'). each (function () {var target_uid = $ (this) .attr ('data-uid'); if (target_uid == now_uid) {$ ( this) .remove ();}})} if (data.status == "failed") {alert (data.msg);}}); return false;}}});});}); / * var myface = "{$ _super ['uid'] | avatar}"; var myname = "{$ _super ['username']}"; var article_id = {$ article ['id']}; var article_user_id = {$ article ['mid']}; // Article author ID $ (function () {<notempty name = "clearnum"> // Reduce the number of reminders var count = parseInt ($ ("# noticeCount"). html ()); count = count-{$ clearnum}; $ ("# noticeCount"). html (count); if ( count

6-layer Blind & Buried PCB Board , Base Material: FR4 S1000-2(TG 170). Inner copper thickness 1 oz and outer 1.5 oz finished. the surface treatment is Immersion Gold 2U" with matt green colour solder mask. White colour Legend.board thickness 1.2 mm. Min.line width/Min.line spacing 0.1/0.1 mm. E-test: 100%. With L1-L2 & L5-L6 blind vias. and L3-L4 buried holes. It is a typical Mechanical Blind & Buried PCB board.
We can make laser and mechanical Blind & Buried PCB Board(no cross-shaped) with the material FR4 or FR4+Rogers mixed material circuit board.

Blind & Buried Pcb Board

Blind & Buried PCB Board

Blind & Buried PCB Board,Customized Buried PCB Board ,Copper Double Sided Board,Blind Buried Via PCB

Orilind Limited Company , https://www.orilind.com