[Photo] Homemade small power amplifier and speaker (TDA1521)


Homemade small power amplifier and speaker (TDA1521)

1. The power amplifier part adopts high-fidelity integrated block TDA1521. The peripheral circuit of the integrated circuit is extremely simple, and there are protection circuits such as overheating, noise suppression, and short circuit, which are suitable for beginners to make. The front stage adopts NE5532 for 10 times line amplification. Coupling capacitors can use domestic CBB capacitors or tantalum capacitors. The pre-stage power supply is obtained by voltage stabilization of 7815 and 7915, and the power transformer should be selected above 30W. Rectifier can use 3A full bridge. The circuit of the power amplifier is shown in Figure 1, and the circuit of the power supply is shown in Figure 2. The circuit board can be carved with a utility knife, and the power amplifier block should be added with a large enough radiator.
2. Speaker 1. Speaker unit: The tweeter uses a 3-inch high-frequency speaker for the surround box. The bass unit uses 4.5-inch speakers for car audio.
2. Box production: It can be made with a medium-density board with a thickness of 10 mm. The size is 270 mm high, 170 mm wide, and 220 mm thick. The phase guide hole is designed at the back, so keep a certain distance from the wall when placing the speaker.
Connect the amplifier and speakers, and listen to it. I believe that the sound created by the cost of less than one hundred yuan will not disappoint you.

Technical area detailed analysis of Doherty power amplifier design load traction principle (top) detailed analysis of Doherty power amplifier design how to improve efficiency (bottom) analysis of voltage follower input and output error analysis Solve the effect of power amplifier on emi

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
Collect People collection
share it:
comment
Publish

related suggestion

[Photo] Homemade TV station

â—† Overview of circuits Many homes now have TV sets, VCDs, video recorders ...

Published on 2006-04-17 19:13 • 401 views
[Photo] Homemade TV station
[Photo] Self-made simple emergency light

Sudden power failure at night will cause inconvenience to your life. The emergency light circuit in this article is simple and the cost is low.

Posted at 2006-04-16 17:32 • 648 views
[Photo] Self-made simple emergency light
[Photo] Self-made simple remote control switch

The feature of the remote control switch is that no special remote control mobile phone is needed, and the ready-made color at home can be used ...

Posted at 2006-04-16 17:28 • 1749 views
[Photo] Self-made simple remote control switch
Self-made simple remote control switch circuit

Posted at 2006-04-16 17:16 • 1698 views
Self-made simple remote control switch circuit
[Photo] High-frequency signal probe of self-made multimeter

& n ...

Posted at 2006-04-15 23:00 • 566 views
[Photo] High-frequency signal probe of self-made multimeter
[Photo] 1W FM Stereo Transmitter

Guo Wangsuo The 1W FM stereo transmitter circuit introduced in this article consists of an audio modulation unit circuit and modulated wave ...

Published on 2006-04-15 20:47 • 882 views
[Photo] 1W FM Stereo Transmitter
[Photo] Self-made portable 45 ~ 470MHz FM receiver (...

Published on 2006-04-15 19:21 • 335 times read
[Photo] Self-made portable 45 ~ 470MHz FM receiver (...
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

175W Metal Halide Led Replacement for HID lamps provide opportunities in post top, wall pack and high / low bay applications for energy efficient upgrades.175 Watt Led Replacement bulbs for post tops, warehouse highbays, bollards and security lights. 175W Metal Halide Led Lamp is designed to fit in existing HID fixtures.Bbier`s smart drive 175W Metal Halide Led Equivalent is the optimal solution to upgrade metal halide low and high bay fixtures.

This 50Watt, 6500lumen commercial Metal Halide Led Replacemen is the perfect replacement for expensive metal halide, incandescent and compact fluorescent bulbs.60W Garden Corn Light bulbs have universal applications and can save up to 80% on electricity consumption when compared to the HPS/HID/MH/INCANDESCENT/CFL lights and fixtures they are replacing. 

175w Metal Halide Led Replacement

175W Metal Halide Led Replacement,175 Watt Led,175W Metal Halide Led Lamp,175W Metal Halide Led Equivalent

Shenzhen Bbier Lighting Co., Ltd , https://www.chinabbier.com

Posted on