PWM輸出口自然就能輸出頻率為2000Hz、占空比為1/2duty的方波。b)I/O口定時(shí)翻轉(zhuǎn)電平驅(qū)動(dòng)蜂鳴器方式使用I/O口定時(shí)翻轉(zhuǎn)電平驅(qū)動(dòng)蜂鳴器方式的設(shè)置比較簡(jiǎn)單,只需要對(duì)波形分析一下。由于驅(qū)動(dòng)的信號(hào)剛好為周期500μs,占空比為1/2duty的方波,只需要每250μs進(jìn)行一次電平翻轉(zhuǎn),就可以得到驅(qū)動(dòng)蜂鳴器的方波信號(hào)。在程序上,可以使用TIMER0來定時(shí),將TIMER0的預(yù)分頻設(shè)置為/1,選擇TIMER0的始終為系統(tǒng)時(shí)鐘(主振蕩器時(shí)鐘/4),在TIMER0的載入/計(jì)數(shù)寄存器的高4位和低4位分別寫入00H和06H,就能將TIMER0的中斷設(shè)置為250μs。當(dāng)需要I/O口驅(qū)動(dòng)的蜂鳴器鳴叫時(shí),只需要在進(jìn)入TIMER0中斷的時(shí)候?qū)υ揑/O口的電平進(jìn)行翻轉(zhuǎn)一次,直到蜂鳴器不需要鳴叫的時(shí)候,將I/O口的電平設(shè)置為低電平即可。不鳴叫時(shí)將I/O口的輸出電平設(shè)置為低電平是為了防止漏電。 額定絕緣電壓:AC440V , 連續(xù)工作壽命:≥30000h。小型繼電器AD16系列蜂鳴器推薦廠家
為本實(shí)用新型微小型電磁式蜂鳴器在實(shí)施方式中上蓋和下蓋的結(jié)構(gòu)示意圖;圖中:1-上蓋、11-上容納腔、12-發(fā)聲孔、2-下蓋、21-下容納腔、22-下底端面、23-下出口端面、24-底板、25-鐵芯、26-電磁線圈、27-粘磁、28-銅圈、29-振動(dòng)膜片、3-固定部。具體實(shí)施方式以下結(jié)合附圖對(duì)本實(shí)用新型的推薦實(shí)例進(jìn)行說明,應(yīng)當(dāng)理解,此處所描述的推薦實(shí)例用于說明和解釋本實(shí)用新型,并不用于限定本實(shí)用新型。如圖1、2、3所示,這種微小型電磁式蜂鳴器,體積小,且發(fā)音效果好,能夠適用于更精密更小的電子設(shè)備,具體的,該微小型電磁式蜂鳴器包括同軸的上蓋1和下蓋2,上蓋1呈圓柱體狀,下蓋2呈立方體狀,下蓋2的長(zhǎng)度和寬度均為3mm,上蓋1呈開口朝下的蓋體結(jié)構(gòu)并形成有上容納腔11,下蓋2呈開口朝上的蓋體結(jié)構(gòu)并形成有下容納腔21。下容納腔21包括下底端面22和下出口端面23,下底端面22上設(shè)置有底板24,底板24上設(shè)置有鐵芯25,鐵芯25與下出口端面23等高,鐵芯25外繞設(shè)有電磁線圈26,電磁線圈26外套設(shè)有粘磁27,粘磁27外套設(shè)有銅圈28,銅圈28內(nèi)還嵌設(shè)有振動(dòng)膜片29,振動(dòng)膜片29位于鐵芯25的上方,銅圈28外蓋合有上蓋1,上容納腔11與下容納腔21相接形成密封的腔室并使上蓋1和下蓋2接合。 嘉定區(qū)主營(yíng)AD16系列蜂鳴器工頻耐壓:AC1890V 50Hz .5s 絕緣電阻≥100MΩ。 交流指示燈允許電壓波動(dòng)±20% 連續(xù)工作壽命≥30000H。
散/無料帶=卷39-00-0083RS有貨)Molex43045-0812Molex44764-1003Molex502790-4091Molex52745-1197Molex35507-0700Molex39-00-0089Molex43045-0813Molex44764-1201Molex502790-5091Molex52745-1296Molex35507-0800Molex39-00-0090Molex43045-0814Molex44764-1202Molex502790-6091Molex52745-1296Molex35507-0800Molex39-00-0095Molex43045-0815Molex44764-1401Molex502790-6491Molex52745-1297Molex35507-0900Molex39-00-0096Molex43045-0816Molex44764-1402Molex502790-8091Molex52745-1397Molex35507-1000Molex39-00-0120Molex43045-0818Molex44764-1601Molex50-29-1031Molex52745-1496Molex35507-1000Molex39-00-0121Molex43045-0819Molex44764-1602Molex50-29-1061Molex52745-1497Molex35507-1100Molex39-00-0123Molex43045-0820Molex44764-1802Molex50-29-1409Molex52745-1597Molex35507-1200Molex39-00-0125Molex43045-0821Molex44764-2401Molex50-29-1608Molex52745-1696Molex35507-1300Molex39-00-0126Molex43045-0822Molex44764-2402Molex50-29-1649Molex52745-1697Molex35507-1400Molex39-00-0127Molex43045-0823Molex44764-2403Molex50-29-1758Molex52745-1797Mol。
美國(guó))Molex39-53-2124Molex501953-0307Molex52271-0879Molex35155-0300Molex38741-6602Molex43020-0601Molex39-53-2125Molex502046-2070Molex52271-0879Molex35155-0400Molex38741-6603Molex43020-0800Molex39-53-2135Molex502046-3070Molex52271-0979Molex35155-0500Molex38741-9802Molex43020-0801Molex39-53-2144Molex502046-4070Molex52271-1069Molex35155-0590Molex38742-1404Molex43020-1000Molex39-53-2145Molex502078-2110Molex52271-1079Molex35155-0600Molex38749-0001Molex43020-1001Molex39-53-2154Molex502078-2510Molex52271-1179Molex35155-0700Molex38749-0099Molex43020-1200Molex39-53-2155Molex502078-3310Molex52271-1269Molex35155-0800Molex38749-0181Molex43020-1200Molex39-53-2164Molex502078-3910Molex52271-1279Molex35155-0810Molex38749-0183Molex43020-1201Molex39-53-2165Molex502078-5110Molex52271-1379Molex35155-0900Molex38749-0185Molex43020-1400Molex39-53-2174Molex502118-5090Molex52271-1469Molex35155-1000Molex38749-0188Molex43020-1401Molex39-53-2175Molex50212-8000Molex52271-1479Molex35155-1100Molex38750-0106Molex43。而其蜂鳴片須與共振腔頻率搭配,才會(huì)有較高的音壓輸出,并由外部振蕩電路生成推動(dòng)信號(hào),使蜂鳴器發(fā)出聲音。
35507-1500Molex39-00-0153Molex43045-0824Molex44769-0401Molex50-29-1900Molex52745-1896Molex35507-1600Molex39-00-0153Molex43045-0825Molex44769-0402Molex50-30-4442Molex52745-1897Molex35507-2000Molex39-00-0154Molex43045-0826Molex44769-0403Molex50-30-4461Molex52745-2096Molex35524-0920Molex39-00-0155Molex43045-0827Molex44769-0601Molex50-30-4467Molex52745-2097Molex35530-1400Molex39-00-0156Molex43045-0829Molex44769-0602Molex503105-4010Molex52746-0471Molex35531-1400Molex39-00-0157Molex43045-0887Molex44769-0801Molex503105-5010Molex52746-0670Molex35532-0306Molex39-00-0158Molex43045-1000Molex44769-0802Molex503108-4010Molex52746-0671Molex35533-0205Molex39-00-0160Molex43045-1001Molex44769-1001Molex503108-5010Molex52746-0771Molex35533-0216Molex39-00-0163Molex43045-1002Molex44769-1002Molex503110-2000Molex52746-0870Molex35533-0224Molex39-00-0163Molex43045-1006Molex44769-1201Molex503110-3000Molex52746-0871Molex35546-0700Molex39-00-0181Molex43045-1007Molex44769-1202Molex503110-4000Molex52746-1070Molex3。壓無源蜂鳴屬于容性負(fù)載器件,理想輸入是雙向方波通常記作:VP-P。楊浦區(qū)施耐德AD16系列蜂鳴器公司
在振動(dòng)頻率為2-80Hz加速度為0.7g下能正常工作。小型繼電器AD16系列蜂鳴器推薦廠家
蜂鳴器 拔下電源線,用鑷子短路三腳插頭的兩個(gè)供電插腳,測(cè)另一頭三芯插孔的兩個(gè)供電插孔間的電阻為零,拿開鑷子時(shí)電阻變?yōu)闊o窮大,說明電源供電線完好,不存在開路和短路故障。測(cè)電腦電源各輸出腳對(duì)地間的電壓全部為0V,在紫線與黑線間測(cè)不到5V待機(jī)電壓,綠線與黑線間電壓也為0V。拆開電腦電源盒,測(cè)電源輸入端正反向電阻均為無窮大,測(cè)TUBE6A保險(xiǎn)絲燒斷。測(cè)C121兩端正向電阻為無窮大,反向電阻為487Ω。C122兩端正反向電阻都為13Ω。沿電路找到并聯(lián)在C121兩端的壓敏保護(hù)電阻RV121(TVR10241X)由黃色變?yōu)榧t色,并被燒缺一塊。RV122(TVR10241X)直接被擊穿為13Ω,但仍為黃色。測(cè)查所有晶體管和大功率管及輸出電路的所有整流二極管和濾波電容,對(duì)可疑元件逐一拆下檢測(cè),未找到擊穿、漏電或開路元件。由電路的連接方式可以推斷出,TVR10241X的保護(hù)電壓應(yīng)該是MYC10K471保護(hù)電壓的一半。用一個(gè)MYG10K471彩電整流濾波輸出端的保護(hù)壓敏電阻,一腳焊接到C121的正極,一腳焊接到C122的負(fù)極,將兩個(gè)串聯(lián)保護(hù)的壓敏電阻改為一個(gè),以提高保護(hù)的靈敏度和可靠性,更換保險(xiǎn)。通電測(cè)C121和C122兩端的電壓分別依次為156V,MYG10K471兩端的電壓為313V,比彩電中該電阻兩端電壓298V高5V。小型繼電器AD16系列蜂鳴器推薦廠家