Hi, welcome to product review by Robojax. My name is Ahmed Shamshiri presenting this
review from Canada. in this review we are going to have preview for this DCP 305 30
volts 5ampere regulated power supply with constant current and constant voltage .and
this video we are going to do the unboxing, after that I am going to test the current
at 2 ampere and then 5 ampere. And then I will go with the lowest lower current
of up to 10 milliamperes to see how much we can set. Also I'm going to open and show you
inside and also show you to how to replace and remove the fuse. Let’s get started with this
Product is from Yescom exclusively sold on Amazon either Amazon Canada US. Or
in Europe or somewhere else. And the model is DC p30 5d and there is also this is a 5
ampere and there is also DCP 3 0 10 which is 10 amperes and if I get my hand on it or have
also review of that as well. the product is sold on Amazon us for 50 dollars and 95
cents unheard of the specs the input voltage depends on your region either 110 or 220 220
or 240 volts AC and the output is from 0 to 30 volts. the maximum current that you can
get is from 0 to 5 ampere. in both cases the accuracy s on the screen 1% and the
ripple in terms of voltage is 10 millivolts . and for constant current is 20 milliampere.
Unboxing
this is the package that I received it from Amazon now let's see what's in the
box already opened it. we got this alligator clips with four millimeter banana connector and then AC
power cable. perhaps they will ship it a different location with different plug based on the region.
This is the power supply very solid belt
let me explain the front these two knobs are for transferring voltage this is to
change the voltage and this is for top fine-tuning it and this is for constant
current CC and this is for fine-tuning when you set output current we have here
three terminals d2 these two are negative or ground they're short-circuited so these are
only one terminal these will be treated as one terminal and this is a positive we have
the power push button here to turn on and off ventilation for air circulation here at
the back we have AC power connector and a fan very sturdy high quality handle that's nice
Opening the power supply
Let’s open it and see what is inside
ahead of how it looks from inside very neat clean design wires layout components and
this is a close-up shot as you can see all these wiring and terminals have been very
neatly connected everything has proper terminals wires are secured this portion
turns resistor for 500 and they used to of this it will be sorted here for 10 MP
do not switch it because still there is some other point that they have modify and change
and also these components in terms of that regulator also will be changed to make it
work for 10 ampere but I just mentioned it and more component that we see these three
at this is for current for a calibration and this is for voltage calibration and
this is for impedance calibration within the circuit so I do not suggest touching this
Testing the power supply
here now I've connected this to my electronic load you see here this is the electronic load
DL 30 31 and these are the two terminal that from the circuit will be connected in here and
we will see the voltage here and the current this is a USB scream but I have actual exact
item here the positive from here is connected to this positive and the negative is connected
to here and also put two extra wires to measure the voltage separately that is connected to this
sense so it's more accurate but this is not necessary in measurement we are reading 3.37
as you can see that a voltage that we have and I'm setting the current now here the current is
set to 2 ampere I'm turning it on from here now 2 ampere is being drawn this also shows
2 amperes 2.0 - that is 2020 million per v 20 and we are reading here 2001 or 2011 so
it just shows 20 milliamperes difference in 2 ampere keep that in mind and you can see
this light is on now we are drawing 2 ampere from here from this device and at 3.3 volts so
let me increase this voltage from here and you will also see the voltage here so I'm
comparing the readings from this device with a precise device that we have let's go to 5 volts
So 5.06 and here we are reading five-point that's 46 million volts that's 50 millivolts
5 millivolts that's 5 out of thousand it's very small acceptable and let me go for 12 volts
pay attention when it's one digit we are reading to the small point when it becomes
two digits it is moved on this side so we see only 100 millivolts now we are reading also
10 millivolts this is hundred this is 10 so when it goes here now we read only hundred millivolts
so twelve volt with two impaired very accurate and the load is also okay enough you pay attention
here in the resistance of my electronic load is set automatically six times two is twelve Thrones
law works and our safety you want to look at a power here this is what this multiplied by this
will give you this power 24 watt let's go to the next voltage fifteen volts and many op amps used
for that 15 volts at 2 ampere if I want increase the current here that is a current and I can move
the cursor left green up to 2 and I increase it 3 ampere now. 3 times 15 is 45 watts you are
reading. let me increase it to 4 that is 4 ampere we are reading here and it shows now this is hit
the fan is running. enough to make sure this is getting cool down now let's do 5 so 5 is the
maximum that this can supply at 12 volts right now it's 25 watt what at 15 volts sorry so let
me go to 24 volts. now 24 volts you see hundred twenty-one watt with these decimal points if
I want to make it accurate so now it's a hundred twenty watts. let's go to 30 volts
Now we are a 30V 150 watt total power of this
Limiting The current using Constant Current (C.C)
Let's say want to set this does not allow more than 1.5A
Limiting current at 1.2A and 12V
And it's at 12 volts I will put it at 12
it's not now connected to my load. so it's at 12 volts. and this is a current knob before
it was set to the maximum let me put it here and I can do the short circuit here
you see now it's short-circuited so don't worry about that so I've connected it and
it shows so you can reduce the current that's milli ampere we have set this to
446 if I increase this it will increase it goes to anther but it controls the voltage
because the total tower is calculated that way let's say one at 1.2 amp so 1.5
1:24 and let me put it at exact
so now this is one point 2A I set it. it if I remove this now any load that you connect to
this will not allow more than 1.2 ampere. now if I set this to different current it will not
allow anything above 1.2 ampere. let me turn it on it allows only one point two and one point
two is coming and that's it. I can increase it from here but the load is set to 5 amp so mark
them this will withdraw 5 amp from this so I can change it otherwise it's just if I turn it
off you will see that the voltage is 12 volts but if I go here is reduce it to 1.2 and the
voltage is drop because that the system this draws this needs 5 ampere if I reduce that if
I reduce this 5 to 4 you will see 4 3 2 if I go 1 2 ampere cell above the value now I'm going 1
now it is 1 ampere. one is okay because it's not above the value we get 12 volts 1 so this
controls that whatever current you want let's say you want to protect the device or something this
is how we set it. put this on a short circuit adjust a current and remove the short circuit.
Low Current Test
I want to see in terms of mill amperes let's say you want to
set you see the current is supposed to be zero now it gets ten is being consumed by my electronic
load because the wire is connected if I disconnect this wire here you see if I disconnect it becomes
zero so my electronic load and draws five 10 milli ampere regardless. so keep that in mind
that 10 that we have is on top of whatever we want. let's say you want to make this 100 milli ampere
Limiting Current to 0.1 (100mA) at 12V
now it's one this is hundred an empire I turned it on so 100 mA is being drawn
as you can see here it shows 110 and you know the reason is that my device draws 10 mA
extra for the LED and extra stuff just for sensing purpose. so this is very accurate now
let's go for 200mA. now it's 200 and it shows two hundred and nine so nine milli
ampere extra. this is 200 now I'm going 300 milli ampere 311 so 400 let's choose 415 so
you see 15 milli ampere so 5 million per extra because 10 is by the electronic load. now let's
go lower see at what current we can measure so 10ma. now I put this at 10ma as you can see issues
11 here it shows 20mA because 10 plus 10 is 20. so the current is also amazing unbelievable
Replacing the Fuse
To remove the fuse you get a flat screwdriver at this point just insert it and remove it like that
thanks for watching this for the review of this DC 3 0 5 D power supply. as you saw that
my tests shown that this is very accurate in terms of voltage display and current and
Canon limitation and display constant current constant voltage up to 5 ampere and even 10
mA. you can control the amount of current as well. so I have no affiliation with them I just
purchased it for a family member and I did the test the decision is yours you and I definitely
recommend this in terms of quality of setting the voltage and current. however one thing that
I did don't know is how long this will last what is a quality in terms of durability the
time will say. until then this was my test result make sure to thumb up 👍 if you learned
something and found this useful as this will help my video in a search algorithm of YouTube.
I would like to thank my Patrons from Patreon.com
I did my part to help you. now it is your turn.
You can subscribe to my channel 🔔
one thing that I did don't know is how long this will what is the quality in terms of durability
the time will say until then this was my test result make sure to thumb up if you
learned something and found this useful as this will help my video in the search algorithm of
YouTube if you have comment our question posted a comment section below I try to
answer and reply if you want to get updates of my upcoming videos you may subscribe now