New miniature programmable DC power supply - FNIRSI DPS-150

[Aldo22]

If it's anything like previous models it'll be a serial port with CH340 chip inside it.

You could tap into the serial data and look at the protocol. I bet it's not complex.

What do you do that with? Wireshark? I have no experience with that.
I think it would be a big plus if you could script this ~$40 PSU.
The GUI tool looks fun, but a script that could be synchronized with other devices would be much more useful.
Setting the voltage and current would be enough imo.

[RAPo]

The ch340 converts usb to serial/uart and then you can do something like this.

What do you do that with? Wireshark? I have no experience with that.
I think it would be a big plus if you could script this ~$40 PSU.
The GUI tool looks fun, but a script that could be synchronized with other devices would be much more useful.
Setting the voltage and current would be enough imo.

[Aldo22]

You could tap into the serial data and look at the protocol. I bet it's not complex.

I think you lost that bet. 
If it's easy for you, then show me how it's done. Please.

[Fungus]

You could tap into the serial data and look at the protocol. I bet it's not complex.

I think you lost that bet. 
If it's easy for you, then show me how it's done. Please.

That's not how things work around here.

Update: My DPS-150 arrived today. Haven't tried it yet though... 

[Aldo22]

Update: My DPS-150 arrived today. Haven't tried it yet though... 

Have fun!

[Aldo22]

I just wanted to mention that I am very satisfied with this little device.
The volts and amps can be adjusted with sufficient precision and safety.
I use it more often than I would have thought because it just sits there without taking up any space. 
Meanwhile, my 300W Longwei is in the cupboard.

I feed it with a 45W PD fast charger. That's enough for almost everything for me.
I can recommend it. 

[slutsteg]

I hope EEVblog will test this device!
In general, how reliable is FNIRSI with fixing and updating the firmware for this model?

Does anyone have tips on an older EU adapter for electronics that supports 230V input and can deliver over 30V and 5A, so I can get the full output of 30V and 5A?

[Aldo22]

I hope EEVblog will test this device!
In general, how reliable is FNIRSI with fixing and updating the firmware for this model?

This little device simply works. I haven't found any problems yet.
Therefore it does not need an FW update. 
A Python script for remote control would be nice.

[Aldo22]

Kerry Wong



I took a look at the “problem” with the subsequent triggering of the overcurrent protection.

It's not ideal, but it's not that bad either.
It protects the first time. It shows you “OCP” in red when it has switched itself off.
Do not switch it on again in this state, but press “Home” twice.
Then “OK” appears again in green and so you can switch it back on and the protection works.
If you know this, it is not a problem imo. But yes, it could be done better.

[rozwell]

Hello there!
Anyone knows if it has reverse current protection?
For example: I'd like charge EFB car battery with CC 5.0A / CV 14.60V until my power bank with PD@20V runs out of juice.
Will DPS-150 survive when power bank recovers and for some reason negotiate lower voltage, like 5V of 12V?

[Aldo22]

Hello there!
Anyone knows if it has reverse current protection?
For example: I'd like charge EFB car battery with CC 5.0A / CV 14.60V until my power bank with PD@20V runs out of juice.
Will DPS-150 survive when power bank recovers and for some reason negotiate lower voltage, like 5V of 12V?

The manual says:

Protection Mechanisms
● Overvoltage Protection
● Overpower Protection
● Overcurrent Protection
● Overtemperature Protection
● Undervoltage Protection
● Reverse Input Protection
● Reverse Output Protection

[rozwell]

The manual says:

Protection Mechanisms
● Overvoltage Protection
● Overpower Protection
● Overcurrent Protection
● Overtemperature Protection
● Undervoltage Protection
● Reverse Input Protection
● Reverse Output Protection

Of course, the manuel, I forgot about their website, thanks!
I just checked it and found these under 7.Precautions section of the manuel:

• The product operates in step-down mode, so ensure that the input voltage is higher than the
  output voltage.
  
• The power supply range for this product is DC 5V~30V. Output will be disabled if the input
  voltage is lower than 5.0V due to undervoltage lockout, (...)
• When charging batteries, it is strongly recommended to add a reverse current protection
  module (such as a Schottky diode) to the output end to protect the device from damage.

So I'll probably use a mosfet for reverse current protection 

[DaneLaw]

...

• When charging batteries, it is strongly recommended to add a reverse current protection
  module (such as a Schottky diode) to the output end to protect the device from damage.

So I'll probably use a mosfet for reverse current protection 

Yep, take your precautions, I did not read the manual, and Im down a Ugreen PSU that took the kickback https://aliexpress.com/item/4001026960817.html? when trying to nurse a 9v back to equilibrium.[/list]

[Newii]

I saw Kerry's review and the OV OC protection takes a long time to kick in, it takes 500ms. Has anyone who has the product tried to replicate what's in the video?
https://youtu.be/ZY2zKWzFi7E?si=PgV8v06HdMPJ_JbK&t=1155

[Aldo22]

I saw Kerry's review and the OV OC protection takes a long time to kick in, it takes 500ms. Has anyone who has the product tried to replicate what's in the video?
https://youtu.be/ZY2zKWzFi7E?si=PgV8v06HdMPJ_JbK&t=1155

Yes, it responds slowly.
I wouldn't rely on it.
Other than that, the switch-on behavior is quite good.

[Aldo22]

Some new reviews:

German: https://www.elektormagazine.de/review/fnirsi-dps-150-kompaktes-und-tragbares-netzgerat-und-wandler

[Paul T]

So I'll probably use a mosfet for reverse current protection 

Please come back and show us your effort and the results.