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回复于
极客DIY
内容:但这个问题已经被老虎基本解决了:在有挡片限位的情况下,由于挡片只能纵向变形,横向相对稳定,所以插头歪斜导致的接触不良问题自然得到了解决。
【南方能才爱好者福音】冰箱压缩机DIY实时冷却··2.0
vocal@ルカ
12年8个月前
回复于
极客DIY
内容:A 毛细管法 这种合适负载稳定 压缩机属于频繁启动B 热力膨胀阀法 这种合适负载变化大 压缩机长期工作 这种阀门可以根据温度来调节流量 温度低时节流小(压缩机功率小)温度高时节流大(压缩机功率大) 这种温度控制比较准确
感光法手工制作双面PCB板(首贴,混个眼熟)
weiwst
10年6个月前
回复于
极客DIY
内容:效果如下图:由于蓝油还是有一点点的粘性,所以纸可以相对稳定的固定在规定位置。
转帖:小型无人机无线遥控系统的实现
254776347
13年2个月前
发表于
航空技术
内容:根据行线的状态,便可得知是否有键按下.如果在列线上逐行加上一个扫描信号,就可判断按键的位置.每一个按键分别对应一个遥控指令,当微处理器判断并确认有键按下时,便产生一个相应的指令编码信号并进行发送.编码信号要求稳定可靠,硬件部分体积小,野外飞行训练时携带方便;软件部分采用c语言编程,修改和编译仿真灵活.经多次实际的飞行试验表明,该操纵系统有效地解决了指令编码的产生、调制、发射以及故障处理的问题,且抗干扰性能好,误码率低,稳定可靠
PVC-Robot【5号】光能陀螺·太阳能卫星机器人
pvcbot
13年6个月前
发表于
电子技术
内容:1、如果是三脚支架离地比较高(相对于转盘),且底部用直径比较小的转盘,则三点平衡比较稳定,每完成一次充电周期后电机转动只能带动转盘转一点距离,一般只能是由一组相邻的双脚交换为下一组相邻的双脚支撑地面,每周期移动的距离比较小,2、如果是三脚支架离地过高(相对于转盘),则三点平衡相当稳定,虽然能够带动机器人移动,但是因为支架过高导致无法交换支撑地面的双脚,就是说一直都是开始运动时默认支撑地面的双脚着地。 ,3、如果是三脚支架离地比较低(相对于转盘),以及底部用直径比较大的转盘,则三点平衡相对不够稳定,每个充电周期后的运行可以接近平滑移动,也就是说每周期移动的距离相对会大一点。
3D打印商业价值在于产业链而非3D打印机本身
hx
11年10个月前
发表于
机械与工具
内容:大型商用产品早已经使用多年,市场竞争相对
稳定。
1200W 双谐振固态特斯拉线圈
Mxxy
4年2个月前
发表于
高电压技术
动手实践: 实验报导
内容:在250AC电源输入的情况下,音乐模式,最高输入电流瞬间可以跑到7A,稳定运行差不多是5A多些。
【KC出品】KC901H手持式标量网络分析仪(含频谱场强功能)团购帖
虎哥
12年5个月前
发表于
会员海报
内容:KC901H的设计宗旨是实用、准确、
稳定。
,内置电桥定向性(90%区间):18dB(3MHz——15MHz,1GHz——2.2GHz)30dB(15MHz——1GHz)频率稳定度:±1ppm/year@25℃电源电压:11.5V……32V(充电)
转发:我们能否从以英美为师,转向与德日同行?
虎哥
5年2个月前
回复于
经济学
内容:邱小平强调,多年来,我国民营企业民主管理工作为促进企业改革发展稳定、推动经济社会又好又快发展做出了重要贡献,也为进一步深化民营企业民主管理积累了宝贵经验。
激光150毫瓦,不明真相的群众来围观
北落师门
12年0个月前
回复于
跳蚤市场
内容:尾部那个锁做工很差,设计着是引线搭在外壳上的,这样的做法会增大接触电阻,而且不稳定,最坑爹的是,搭线还出错了,导致尾部开关无效,不管上锁还是不上都能点亮,自己矫正后才解决的。
中国大亨 1.0
novakon
8年1个月前
发表于
软件综合
内容:中国有句古话,叫防民之口甚于防川,意思就是舆论决定政权,谁能控制舆论,谁就能维护政权稳定(反之亦然)。,那这跟我有什么关系呢 中华上下五千年,所有的朝代,所有的帝王,都希望通过各种手段维持政权的稳定,比较著名的案例有秦始皇的焚书坑儒。
衡流充电消除硫化物
hambaby
15年0个月前
回复于
电子技术
内容:AH数值)小电流下恒流充电,电池初始端电压可以高达数10V甚至上100V,经过若干时间(数小时~上百小时不等),电池端电压由于PbSO4转化为活性物质,逐步掉到12V附近,1/100C的电流下,当端电压稳定在
假如电网推倒从来,我们该如何选择?
虎哥
12年10个月前
回复于
电子技术
内容:更合理的划分区域,有一些老的长线路、跨区的连接线可能会改成直流,一些低电压等级的会改高,一些小火电就干脆不建了,使得电网的整体效率和稳定性提到最高状态。
自制大功率无线数传电台(原创)
hamdad
17年7个月前
回复于
电子技术
内容:的输出管MRF464还是老化,额定40W的管子连1.8W都出不来……当然用高频电压表测得31V,虽然说的是1972标准输出15W,但大哥可以亲自一试1971标称输出7.5W我都试过,工作在极限状态下虽不稳定
【航空宇航科学与技术系列】浅谈与探空火箭相关的飞行力学
飞鹰航天
1年9个月前
发表于
喷气推进
航天技术
严肃内容: 专业科普
内容:火箭飞行力学理论是火箭运动的基础理论,其动力学特性直接影响到控制系统的设计以及飞行弹道的稳定性。
我发动机改好了,各位提点完善它的建议吧
usercim
16年1个月前
回复于
喷气推进
内容:(燃料药量,火箭设计上的比例)在向下说还有关于回收的问题.比如降落伞之类.近观列的很详细,但是实际操作的时候难免还是会遇到以外的问题...所以还是希望你至少做一次发动机静态测试.火箭的飞行稳定性就先不谈
150N试验性气态氧煤油发动机试车成功
琉璃冬
8年9个月前
回复于
喷气推进
内容:当然在氧气环境下同样见火就燃,但是很
稳定。
0.005%THD 160mW 300kHz平坦 5元成本DIY甲类耳放。
novakon
10年9个月前
发表于
电子技术
内容:实现输出160mW时,典型功耗2.5W 供电电压:5V-30V线性电源(如果是开关电源,确保开关频率高于50kHz即可,例如LM2596在输出功率稍大时即稳定于150KHz) 使用较高电压时可轻松驱动
该来的还是回来-STM8的软件USB
金坷居士
8年4个月前
发表于
电子技术
内容:STM8是一种性价比很高的单片机,上面外设功能很强大,价格也便宜,封装也够小,也够稳定,就是不带硬件USB,而且也没有现成的软件USB哎。
第二章 佩内明德的建立
李挺诺夫
8年2个月前
回复于
喷气推进
内容:事实也正如元首所料,在这样的国际环境下,再加上德国经济的稳定增长,元首信心大受鼓舞,1935-36年开始加速重整军备。,但现在导弹存在稳定性问题,并且导弹现有轨道高度过低,只能在大气层内飞行,这会带来风阻问题。,即使这两个问题能够克服,导弹只靠一个大型陀螺仪稳定,其射击精度会很差(按照巴黎大炮的经验,如果弹道足够高,空气摩擦带来的阻力会大大减小,射程会随之显著增加)。
多功能高频高频焊台首版终于完工
rocket_man_8
6年8个月前
发表于
会员海报
内容:内部了整理不好搞,但体积、功能和稳定性这个目标还是完美的实现了。
【原创】自冲升压发动机的构思和设计
nighthawk
14年1个月前
发表于
喷气推进
内容:燃料黄色是通过整流锥后被缩口加速的气体 上下两端的排气在整流锥的顶端对冲使速度骤降增大压力 再从喷口喷出, 红色是点火器,从中间点燃如此就提高了内压 提高了发动机效率 同时压心保持在整流锥顶端 不会因燃料燃烧移动 也提高了稳定性以下是结构图
第二章:无加热冷混合推进剂技术
ABC
16年5个月前
回复于
喷气推进
内容:但我从来都是支持先专一发展KNDX,因为这种推进剂综合性能实在太优秀了,对于业余条件来说,KNDX优点很多: *有合适的比冲 *材料便宜易得 *制作和使用都较安全 *可浇注,工艺性好 *燃速适当而且可以通过催化剂调节 *性能稳定,粉状的KNDX较熔注或重结晶的KNDX,吸湿性很小.但粉压KNDX太难点燃,我测试了包括60:40标准比例和其它各种比例,并加入其它易燃物,点火性能均没有明显改善,如果放置一段时间后更难着火.而且工作不稳定,各成分间的关系 增加硫的含量会增加燃料的燃速,同时燃料更易点火,对冲击和摩擦更加敏感,危险性增加.所以我只推荐5%的硫含量 减少花生油含量会使燃料稍增加,但燃烧更不稳定,成型性变差.增加花生油会降低燃速,,成型工艺性好,加入量过多同样会造成燃烧不稳定.可用的加入量为:每10克燃料---5滴--15滴.推荐加入8滴.,我用中药粉碎机很方便,手工研磨的话一定要仔细研细,颗粒过粗会造成燃烧不稳定无法形成推力 各种成分研磨好后,准确称量 硫和碳最好一起研磨.但千万别把硝酸钾和碳或硫混合研磨.
化学扫盲贴 元素化学
thallium2012
14年9个月前
发表于
化学
内容:(4)了解活泼金属元素重要盐类的溶解性和碳酸盐的热稳定性、形成配合物及溶剂合电子的趋势及对角线规则。,(4)掌握Fe、Co、Ni的+2、+3氧化态化合物的稳定性规律以及反应性上的差异;熟悉它们的重要配合物。
前苏联的激光坦克.
skyline
11年8个月前
发表于
强激光
内容:在试验过程中激光武器系统曾经装在该设计局的两种不同的履带平台上,以便考察它的通过性能以及战场条件下的稳定性和适应性。
第一次发帖,创意----拒绝交电费的空调、热源发电机等等
逆天
13年0个月前
发表于
极客DIY
内容:蜡烛的安置需要一点小技巧,使蜡烛与铜板保持稳定距离,比如找个不大导热的东西从上往下把蜡烛抵住,蜡烛下面用弹簧顶。
讨论特斯拉线圈现有工作模式的改进--主动续流工作模式
rb-sama
5年11个月前
回复于
高电压技术
内容:而后,交替负逻辑,这样可以分摊桥臂四个管导通产生的热量,在FB信号稳定的情况下,可以用组合逻辑简单实现。
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