02:32

制作最简单的矿石收音机

04:22

Why do PCB traces have to turn? It turns out to be very knowledgeable，PCB线路为何不走直线，原来大有学问

03:11

Will the charger consume power when it is unloaded?四个充电器一直插着会费电吗？

04:02

万用表测量半波整流电压可行吗？原来想错了 Is a multimeter accurate for measuring half-wave rectification?

03:06

太阳能发电，电能过剩只有浪费掉

03:29

Does the water heater anti-electricity wall have any protective effect?热水器防电墙到底有没有作用

01:54

变压器的磁通

07:58

制作点焊机Make a spot welder from a microwave oven transformer

02:00

音箱线卷起来影响音质吗

01:29

开关电源次级整流为何只用2个二极管，而不是4个为什么

04:47

80年代西湖黑白电视维修

05:50

DIY hand generator 手摇发电机带电视

02:49

零线断开烧毁电器The neutral line is open and the electrical appliance is burned.

01:50

穿墙电线用钢管保护会引起发热不可取

16:59

制作手摇发电机

01:09

电抗器的作用The role of reactor

01:14

What is the safe neutral current of the transformer?

01:25

The role of compensation capacitor

06:32

Repair 200 W floodlight with screwdriver用螺丝刀修复LED灯，不用电烙铁

03:45

3 square meters of copper wire is used as a ground wire, aluminum welding rods cannot be purchased

08:36

Angle grinder power tool DIY制作角磨机电动工具

07:57

Repair electric bike charger电动车充电器没想到这样损坏

03:08

Schottky diode as detection diode

18:07

Repair a decades-old cassette player几十年前的收录机维修

03:57

How to avoid overcharging of lead-acid batteries, timer is the best way铅酸蓄电池避免起包的办法就是用定时器

03:41

电动车电池四块换一块怎么操作才能跑得远

03:42

电度表是不是准确自己就可以检验You can check whether the electric meter is accurate or not by yourself

02:46

Repairing old multimeter

00:13

1200KW hydropower station

03:08

Ore radio with multiple speakers

01:35

Three-phase transformer rewinding

04:13

Disassembly of megger

01:06

Slot type inverter transformer

00:26

八十年代的黑白电视Black and white TV from the 1980s

01:26

84年的收音机Radio from 1984

00:48

哪个小球先到达终点Which ball reaches the end first

03:16

10000V的变频器High voltage frequency converter

01:21

轮胎起火了tire on fire

02:45

变压器的并联Transformers in parallel

04:33

三相变压器的连接方法Three-phase transformer connection method

01:03

零线断了为何会烧坏电器Why will electrical appliances burn out if the neutral wire is disconnected?

03:05

自由能发电不存在，大家一定不要模仿

01:22

点焊机

05:02

手工搭棚的功放机

02:31

步进电机伺服电机驱动

02:52

变压器零线从哪来的

07:18

柴油机发电，停电不用愁

07:35

936焊台的拆解

01:22

不一样的焊接电烙铁

02:11

制作收音机

01:15

变压器可以这样连接吗

00:18

转动的钢球电动机原理

00:13

电工作业时被高压电击死

00:31

电工施工突然送电被电击起火

12:29

电线漏电检查

04:34

焊机改成逆变器

03:57

400KW发电机拆解

01:40

笑死人FUNNY

03:36

LED灯微亮的解决办法Solution to slightly bright LED

03:26

大型风力发电机Large wind turbine