单片机自动断电或关机电路图讲解
2023-10-17 11:58:32
379 ![](https://file1.elecfans.com/web2/M00/A3/39/wKgZomUD8S6AdxJAAAB1uVpUiNc591.jpg)
【任务】大量的仪器仪表使用电池供电,如果忘记关闭电源,电池将很快消耗干净,严重时电池会漏液腐蚀电路,造成不可挽回的损失。试设计一个自动关机电路,当忘记手动关闭电源时,电路会在“闲置”一小段时间后自动关机。
2023-03-29 11:47:31
468 ![](https://file.elecfans.com//web2/M00/9B/CA/pYYBAGQjtNCAPcFSAABUKhpLJGc783.jpg)
分享网友 UT61E拆机图+ 也D 完美版 自动关机功能
2022-10-25 16:19:25
1 最近搞了个测温仪,为了使用方便让它自动关机。定时关机。网上找了个电路整理一下。方便大家测试了。D4口上电必须为高电平,否则开不开机,长按开机键等单片机启动后松手。状态为开机,等待1分钟D4口变低
2022-01-18 10:20:19
4 · 玉立CST8-170自动抽油烟机电路图· 益光CXW-145-200B带风帘双轮型抽油烟机电路图· 益光CXW-125A超薄型自动
2008-11-17 12:28:20
今天用万用表的时候,突然很奇怪,为什么过了一段时间不使用后它就“自我了结”了呢?怎么实现的呢?实验室的福禄克表,蛮贵,不敢擅自拆开,所以就网上查询资料,呵呵,这一查,好玩了。发现了各种软关机电路,就是单片机工作一会后,自动关机了。好灵性和智能哦。
2017-04-26 15:34:09
16601 ![](https://file1.elecfans.com//web2/M00/A6/BC/wKgZomUMQAOAbrbFAAAuPP_7DwU933.png)
今天用万用表的时候,突然很奇怪,为什么过了一段时间不使用后它就“自我了结”了呢?怎么实现的呢?实验室的福禄克表,蛮贵,不敢擅自拆开,所以就网上查询资料,呵呵,这一查,好玩了。发现了各种软关机电路,就是单片机工作一会后,自动关机了。好灵性和智能哦。
2015-07-24 16:51:17
10151 ![](https://file1.elecfans.com//web2/M00/A6/82/wKgZomUMPjeAGnlCAAAUWZi_eEA016.jpg)
节电是各种电池供电设备所需考虑的首要因素。为防止用户忘记关机,一些设备采用了自动关机电路。此外,许多设备中使用一个开/关按键控制开启或关断电源,即使微处理器(MPU)正在处理关键程序,按键按下时,系统也会关断,造成重要数据的丢失。
2014-09-16 11:33:00
1962 手机自动关机是怎么回事?如果是在手机的外部可能引起自动关机的因素排除的话,那就是手机内部(电路板)的原因了;下面也讲讲手机内部原因引起自动关机的问题.
2012-05-10 14:52:33
151744 自动关机电路的特点是当仪表停止使用一段时间之后,能自动切断电源,使仪表进入微功耗的备用模式
2010-12-09 11:51:15
1111 ![](https://file1.elecfans.com//web2/M00/A5/CC/wKgZomUMOiqANVI8AAHeO0HAhNQ433.jpg)
手机自动关机如何解决?
手机自动关机1:检查电路板与电池触
2009-12-19 14:16:09
5084 给数字万用表加上自动关机电路
在DT-830型数字万用表上装了一个简易的自动关机电路,该装置体积小,构造简单
2009-11-23 20:30:09
3587 ![](https://file1.elecfans.com//web2/M00/A5/5F/wKgZomUMOCCAZkEvAAA0f7Epa8Q000.jpg)
索尼/海信/长虹电视机自动关机电路
下图是索尼,海信,长虹电视机常用的自动关机电路,电路非常简单。明了。
2009-09-22 08:56:12
895 ![](https://file1.elecfans.com//web2/M00/A5/45/wKgZomUMN62AIyImAAGUtKqIzYM233.jpg)
机外型彩电交流全自动关机电路
有遥控开机功能的彩电在关机时仅是部分关机,要想实现交流全自动关机可采用本电路。 电路见图,按下AN,手动开机使
2009-07-29 14:54:20
1011 ![](https://file1.elecfans.com//web2/M00/A5/33/wKgZomUMN1-AQAuiAACMsER2TEY422.jpg)
DT1000、CM4200型自动关机电路图
2009-07-22 17:31:09
691 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0mAbxADAAA4Dl4ZG4k606.jpg)
DT1000、CM4200型直流电压测量电路图
2009-07-22 17:30:47
693 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0mAcqkiAABHfkiiqsM454.jpg)
DT1000、CM4200型频率测量电路图
2009-07-22 17:30:15
725 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0mATh7CAABdrzdmKD0854.jpg)
DT1000、CM4200型交流电压测量电路图
2009-07-22 17:29:49
793 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0mAeEt0AABWltYK_qg232.jpg)
DT1000、CM4200型电阻测量电路图
2009-07-22 17:29:20
677 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0mASeuIAABlHFPQHdo190.jpg)
DT1000、CM4200型电容测量电路图
2009-07-22 17:28:51
624 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0iAFM5HAAB9Um-xMCY959.jpg)
DT1000、CM4200型200MΩ高阻挡的测量电路图
2009-07-22 17:27:19
626 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0iANRr-AABPvg7wRXY022.jpg)
DT1000、CM4200型4,1 2位AD转换电路图
2009-07-22 17:25:59
658 ![](https://file1.elecfans.com//web2/M00/A5/2F/wKgZomUMN0iAbF36AACYnntITQM528.jpg)
M3800、DT3900型3,1 2位数字万用表的总电路图
2009-07-21 17:39:25
1913
DT860D、CM2600型3,1 2位自动测量数字万用表电路图
2009-07-21 17:33:44
1297
自动关机电路图
2009-07-21 08:05:59
735 ![](https://file1.elecfans.com//web2/M00/A5/2E/wKgZomUMN0SAR1wKAAAQTYHJmrs729.jpg)
DT890D、CM3900型3,1 2位数字万用表的总电路图
2009-07-20 17:30:25
3774 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0SASTVoAAIauDN1zCQ525.jpg)
DT809C+、CM3920型直流电压测量电路图
2009-07-20 17:26:23
505 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OAJmOnAABFjUDsjss481.jpg)
DT809C+、CM3920型直流电流测量电路图
2009-07-20 17:26:00
521 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OAM2gLAABS9RX9Jrs384.jpg)
DT809C+、CM3920型小数点及标识符驱动电路图
2009-07-20 17:25:39
475 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OAXlFCAAByvNy8aQk916.jpg)
DT809C+、CM3920型晶体管hFE测量电路图
2009-07-20 17:25:02
397 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OATf92AAA8XE-N-F0962.jpg)
DT809C+、CM3920型交流电压测量电路图
2009-07-20 17:24:35
709 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OAXyu9AABky4viYt0980.jpg)
DT809C+、CM3920型二极管及蜂鸣器电路图
2009-07-20 17:24:09
669 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OALnToAACKd8Obzsk600.jpg)
DT809C+、CM3920型电容测量电路图
2009-07-20 17:23:34
546 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OAFwlBAAClwLxZNBE015.jpg)
DT809C+、CM3920型测温电路图
2009-07-20 17:23:09
541 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OACKK3AABYhGqO_RI181.jpg)
DT809C+、CM3920型200MΩ高阻挡测量电路图
2009-07-20 17:22:22
433 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OAcwFKAABbGDUCdrA942.jpg)
DT809C+、CM3920型AD转换电路图
2009-07-20 17:21:59
610 ![](https://file1.elecfans.com//web2/M00/A5/2D/wKgZomUMN0OAXcBaAABpDNy5yE0458.jpg)
DT890、DT890A型直流电压测量电路图
2009-07-18 17:13:03
960 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAbOBxAABIHvxRYDA034.jpg)
DT890、DT890A型直流电流测量电路图
2009-07-18 17:12:35
1139 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAdCIhAABcBEv-t5g631.jpg)
DT890、DT890A型晶体管hFE测量电路图
2009-07-18 17:11:26
588 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAJv-kAAA7olRLSd0474.jpg)
DT890、DT890A型蜂鸣器电路图
2009-07-18 17:11:04
1649 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAclSLAABQsX8zsUY859.jpg)
DT890、DT890A型电阻测量电路图
2009-07-18 17:10:41
695 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAJx6UAABidPM0XVM911.jpg)
DT890、DT890A型电容测量电路图
2009-07-18 17:09:49
902 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAeIGrAACDD0LcHU0447.jpg)
DT890、DT890A型AD转换电路图
2009-07-18 17:09:24
705 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAMABFAABPPU_pKcE188.jpg)
DT840D、CM3900A型直流电压测量电路图
2009-07-18 17:07:59
371 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAWZhmAABAGHmsf3g705.jpg)
DT840D、CM3900A型直流电流测量电路图
2009-07-18 17:07:17
405 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAcl-mAABPNh2hZrA523.jpg)
DT840D、CM3900A型交流电压测量电路图
2009-07-18 17:06:41
456 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeARuiCAABg8CL8lvc943.jpg)
DT840D、CM3900A型二极管和蜂鸣器挡电路图
2009-07-18 17:06:07
469 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAfA4wAABg7WsceqE319.jpg)
DT840D、CM3900A型电阻测量电路图
2009-07-18 17:05:38
444 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeADyEOAABRjm_OFNQ057.jpg)
DT840D、CM3900A型标志符驱动电路图
2009-07-18 17:04:54
483 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAPKu7AABLji5vysI635.jpg)
DT840D、CM3900A型AD转换及低电压指示电路图
2009-07-18 17:04:12
505 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAQOl1AABrClmpHdg633.jpg)
DT840D、CM3900A型3,1 2位数字万用表的总电路图
2009-07-18 17:03:44
713 ![](https://file1.elecfans.com//web2/M00/A5/2B/wKgZomUMNzeAN7cjAAFA-XwYGVU050.jpg)
DT830C、CM2400型直流电压测量电路图
2009-07-18 16:55:38
456 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaASAU8AAA-D22Pe7A711.jpg)
DT830C、CM2400型直流电流测量电路图
2009-07-18 16:55:12
509
DT830C、CM2400型交流电压测量电路图
2009-07-18 16:54:49
414
DT830C、CM2400型二极管及蜂鸣器挡的电路图
2009-07-18 16:54:25
588
DT830C、CM2400型电阻测量电路图
2009-07-18 16:54:00
519 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAdajuAABZT--BB5c781.jpg)
DT830C、CM2400型测温电路图
2009-07-18 16:53:34
447 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAWaGxAABZZ3c2uMM924.jpg)
DT830C、CM2400型AD转换及小数点驱动电路图
2009-07-18 16:53:12
595 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAUDbVAABwwxVesv8259.jpg)
DT830B、CM2300型交流电压测量电路图
2009-07-18 16:50:56
679 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAMzlYAABK4aRqsEE753.jpg)
DT830B、CM2300型直流电压测量电路图
2009-07-18 16:50:19
1002
DT830B、CM2300型二极管测试电路图
2009-07-18 16:49:43
729
DT830B、CM2300型电阻测量电路图
2009-07-18 16:49:15
1112
DT830B、CM2300型AD转换及LCD驱动电路图
2009-07-18 16:48:21
1133
DT830A,CM3900,DT840型直流电压测量电路图
2009-07-18 16:47:17
423 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAcD7hAABHRYt3nRE415.jpg)
DT830A,CM3900,DT840型直流电流测量电路图
2009-07-18 16:46:51
383 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAHXdgAABfcumjagI216.jpg)
DT830A,CM3900,DT840型小数点及低电压指示符驱动电路图
2009-07-18 16:46:29
402 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAHr9OAABryKG8jTg481.jpg)
DT830A,CM3900,DT840型交流电压测量电路图
2009-07-18 16:45:54
524 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaACfm8AABr5a8X89o792.jpg)
DT830A,CM3900,DT840型蜂鸣器电路图
2009-07-18 16:45:31
469 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAUFvCAABOKEe2xF8905.jpg)
DT830A,CM3900,DT840型二极管测试电路图
2009-07-18 16:45:10
371 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAV1vmAABQol3og_s540.jpg)
DT830A,CM3900,DT840型电阻测量电路图
2009-07-18 16:44:47
469 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAa0lCAABlD6jqEGU817.jpg)
DT830A,CM3900,DT840型测量hFE的电路图
2009-07-18 16:44:27
369 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAAHk0AABvAWYWRu8440.jpg)
DT830A,CM3900,DT840型AD转换电路图
2009-07-18 16:43:52
672 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzaAa85yAABRNuff77A623.jpg)
DT830A,CM3900,DT840型3,1 2位数字万用表的总电路图
2009-07-18 16:42:45
898 ![](https://file1.elecfans.com//web2/M00/A5/2A/wKgZomUMNzWAZKCBAAFlku8F-TQ127.jpg)
灵达牌YPZ5-4D型自动抽油烟机电路图
2009-06-09 10:43:42
736 ![](https://file1.elecfans.com//web2/M00/A4/FF/wKgZomUMNn-AfZ4mAACa0Nx5ItY963.jpg)
音像设备自动开关机电路图
2009-05-23 13:44:50
907 ![](https://file1.elecfans.com//web2/M00/A4/F0/wKgZomUMNkeASG1AAAC5KDB8n7M076.jpg)
电视机自动关机控制器电路图
2009-05-23 13:27:02
547 ![](https://file1.elecfans.com//web2/M00/A4/F0/wKgZomUMNkaAY1sjAADIl5JNGNM106.jpg)
DT9208A型万用表电路图
2009-05-20 17:43:23
654
自动关机电路图
2009-05-08 13:47:01
1848 ![](https://file1.elecfans.com//web2/M00/A4/DF/wKgZomUMNgeAIEyAAABnFs0Z-Q0724.jpg)
无绳电话静噪控制自动关机电路
2009-03-12 22:27:34
516 ![](https://file1.elecfans.com//web2/M00/A4/A0/wKgZomUMNQaAMzhvAADwZLS4w1Q978.jpg)
无绳电话静噪控制自动关机电路
2009-03-11 21:50:48
695 ![](https://file1.elecfans.com//web2/M00/A4/9F/wKgZomUMNQSAQrgcAADUuoiJ08c681.jpg)
DT840D型万用表电路图
2008-12-04 21:39:13
1691 ![](https://file1.elecfans.com//web2/M00/A4/7D/wKgZomUMNGyAUqfMAAULkkFgh5M703.jpg)
信雄CXW-16D深吸型自动抽油烟机电路图
2008-11-12 23:34:34
909 ![](https://file1.elecfans.com//web2/M00/A4/77/wKgZomUMNFOAWJQ3AADPBWzyCeo030.jpg)
万用表自动关机电路
2008-09-20 15:14:22
4549 ![](https://file1.elecfans.com//web2/M00/A4/65/wKgZomUMNAWAMBkpAAF7Gr4ud8M856.jpg)
电视机自动关机电路
2008-05-24 10:45:03
949 ![](https://file1.elecfans.com//web2/M00/A4/59/wKgZomUMM9OAe4AoAAHT258vMmc583.jpg)
机外型彩电交流全自动关机电路
2006-12-05 13:53:49
684
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