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英語 10:10 Science & Tech

Jesverty SPS-3010N Lab Power Supply Review

A24 · 11,458 回視聴 · 追加日 1ヶ月前

字幕 (276 セグメント)

00:00

review and tear down this time this is a

00:02

just verti lab power supply it's the SPs

00:05

310 uh up to 30 volts output and up to

00:08

10 oz of capability on current um it's a

00:11

typical loud power supply when you turn

00:13

it on you can adjust the voltage uh on

00:15

the output there's a coarse adjust on

00:17

the right hand side which lets you get

00:19

it about where you like it and then to

00:21

dial it it perfectly there's a fine

00:22

adjust on the left hand side below here

00:26

there's a current Set uh current setting

00:28

is quite helpful to allow power supply

00:30

if you're doing prototyping if you don't

00:31

want an accidental short to burn

00:33

everything up you can sometimes set a

00:34

nice low current limit save your circuit

00:37

another really popular use of it is if

00:39

you are trying to charge a battery and

00:41

you need to keep the current below a

00:42

certain point now unlike a lot of power

00:45

supplies which might have an adjustment

00:46

button for setting the currents on this

00:48

one you have to keep the voltage below 5

00:50

volts and short the output and then just

00:52

like the voltage is the course

00:54

adjustment knob on the right hand side

00:56

and a fine adjustment knob on the left

00:59

hand side

01:00

another unusual feature it looks like

01:01

there's a usba connector here with up to

01:03

a 10 wat uh 5vt uh connection uh which

01:07

could be quite helpful so in some ways

01:09

it's a dual output power supply Let's uh

01:12

review the performance of the unit and

01:14

then we'll tear it apart and look at the

01:16

construction uh it's the bestselling

01:18

unit that was on Amazon when I bought it

01:20

so obviously it has uh lots of people

01:22

purchasing it and it's quite sharply

01:25

priced let's see what you get for your

01:27

money so the first thing to check uh is

01:29

is what happens when you turn it on does

01:31

the voltage go to where you hope it to

01:33

be if you notice you press the power

01:35

button uh it it goes like it says 80

01:37

volts almost instantaneously before it

01:39

goes to the 42 volt it's set let's put

01:41

this on an oscilloscope and uh see if

01:43

that's true or not okay the power supp

01:45

is off I turn it on uh you can see it

01:48

comes up and uh this is fine this is

01:50

actually good it's monotonic doesn't

01:54

overshoot reaches the voltage that's

01:56

desired and then uh if I turn it off you

01:58

notice there's probably a fair bit of

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