Hey Kerry, the OVP indicator on the display was GREEN the first time until triggered, and was still RED the second time you applied power, indicating it is inactive. Another excellent KW review. I enjoyed your change in delivery tone 20:50 " What⁉" when you discovered the protection was disabled. 😯 The user manual does not state how to restore OVP. I agree with you that the software is incorrectly programmed for absolute user protection. Firmware update is not available when I checked. I think FNIRSI should be quicker about implementing fixes across their devices, especially if they are inadvertently using influencers for beta testing. For the price, I wish they supplied a high voltage PD source. Otherwise, they should just call their product a DC-DC converter. It's not a power supply in the classic sense.
When I reviewed this same unit a few weeks ago the over voltage and over current limits were working for me even with repeated attempts, I don’t remember what firmware version mine was. It is funny how our reviews ended up being so similar, but we both covered what needed to be tested.
Just tested my unit with version 1.1 firmware. It agrees exactly with your tests. My overcurrent settings are ignored on the second try too. There is a red OCP warning in the PC software next to the "Open" button. Great review!
I have professional power supplies that require a manual reset, or turning the unit off and back on. However, they do not supply power until that process is completed.
An open switch is off, and a close one is on. It is actually logical having the switch concept in mind. Also I have another power supply which can be also powered by both barrel and usb-c and there is no need for a switch to select either one. I suppose the function of the slide switch behind it is indeed that of powering on and off the device.
Hi Guys !! Would you recommend this one or BSIDE i83010 ( at 30V/10A/300W cheaper version of the i84020 unit you tester few months ago). The portability and size is not important to me. 5 extra amps and 150 extra watts are also not important to me. Which one would you reccomend based on build quality and performance ? Thanks!
Very in-depth review of the low cost DC 30V 5A. Interesting PCB. I question the durability of the capacitors and copper coil, but could be OK for low voltage and milliamps. 📱💻
It appears there may have been voltage present at zero setting due to an internal capacitor across the output terminals. An internal capacitor across the output terminals could also explain the instability at low output currents. I have seen similar behavior on expensive bench supply with an $800 price tag. If the Fnirsi power supply had buck/boost function, it probably would have been a much larger volume to accommodate a big inductor or switched capacitors as voltage multiplier.
interesting little thing with very affordable price. it reminds me in something similar from miniware but there with much higher price. i think it is relatively new so no long time experience is available. are there alternatives out there comparable in size and function?
@ I believe you may be correct. I have a feeling that comments here prodded Zotek to fix some problems with the Zoyi ZT-703S Oscilloscope Multimeter combo. It is a much better product after the firmware improvements.
Hey Kerry, the OVP indicator on the display was GREEN the first time until triggered, and was still RED the second time you applied power, indicating it is inactive. Another excellent KW review. I enjoyed your change in delivery tone 20:50 " What⁉" when you discovered the protection was disabled. 😯 The user manual does not state how to restore OVP. I agree with you that the software is incorrectly programmed for absolute user protection. Firmware update is not available when I checked. I think FNIRSI should be quicker about implementing fixes across their devices, especially if they are inadvertently using influencers for beta testing. For the price, I wish they supplied a high voltage PD source. Otherwise, they should just call their product a DC-DC converter. It's not a power supply in the classic sense.
Great video as usual. Professional, unbiased and informative. Thank you.🙏
If OCP or OVP (red) lights up, simply press “home” twice until “OK” (green) appears again.
The protection will then work again.
Well that’s useful information! Thanks!
You do great product reviews
When I reviewed this same unit a few weeks ago the over voltage and over current limits were working for me even with repeated attempts, I don’t remember what firmware version mine was. It is funny how our reviews ended up being so similar, but we both covered what needed to be tested.
I just watched your review. The interesting thing is that your firmware version is the same as mine.
Just tested my unit with version 1.1 firmware. It agrees exactly with your tests. My overcurrent settings are ignored on the second try too. There is a red OCP warning in the PC software next to the "Open" button. Great review!
I have professional power supplies that require a manual reset, or turning the unit off and back on. However, they do not supply power until that process is completed.
As usual, well done Kerry! I would mount a small cooler with a thermal sensor there, in case of prolonged use of the converter.
An open switch is off, and a close one is on. It is actually logical having the switch concept in mind.
Also I have another power supply which can be also powered by both barrel and usb-c and there is no need for a switch to select either one. I suppose the function of the slide switch behind it is indeed that of powering on and off the device.
Hi Guys !! Would you recommend this one or BSIDE i83010 ( at 30V/10A/300W cheaper version of the i84020 unit you tester few months ago). The portability and size is not important to me. 5 extra amps and 150 extra watts are also not important to me. Which one would you reccomend based on build quality and performance ? Thanks!
Thank you for a very informative review
Very in-depth review of the low cost DC 30V 5A.
Interesting PCB. I question the durability of the capacitors and copper coil, but could be OK for low voltage and milliamps.
📱💻
It appears there may have been voltage present at zero setting due to an internal capacitor across the output terminals. An internal capacitor across the output terminals could also explain the instability at low output currents. I have seen similar behavior on expensive bench supply with an $800 price tag.
If the Fnirsi power supply had buck/boost function, it probably would have been a much larger volume to accommodate a big inductor or switched capacitors as voltage multiplier.
interesting little thing with very affordable price. it reminds me in something similar from miniware but there with much higher price. i think it is relatively new so no long time experience is available. are there alternatives out there comparable in size and function?
Brilliant! Can charge each of my 3 wives mobiles and still have an egg timer!
👍
I checked the FNIRSI web site downloads section snd there is a file for the DP-150 operating manual, but not yet any sign of a firmware update.
Of course they will update it, but only after a review by our Kerry specialist😉
@ I believe you may be correct. I have a feeling that comments here prodded Zotek to fix some problems with the Zoyi ZT-703S Oscilloscope Multimeter combo. It is a much better product after the firmware improvements.
cool i want it send it to me please and thank you