Products > Test Equipment
Power supply ripe for the picking
trcm:
Thanks for the efforts writing the Sigrok driver for this class of devices!
I've added some Sigrok wiki pages for these devices with some links to the software and manuals (English), and I've made a note of the known device class and models where we know them so far...
https://sigrok.org/wiki/ETommens_eTM-xxxxP_Series (parent page)
https://sigrok.org/wiki/Hanmatek_HM305P (oem / reseller model)
https://sigrok.org/wiki/RockSeed_RS310P (oem / reseller model)
trcm:
One note about the Hanmatek HM305P is that when driving a PWM load in the region of very roughly 3hz, the rear fan cycles up and down almost in lock-step, implying (to me anyway) that it’s not driven off a thermal sensor.
This makes it fairly audibly-annoying for this load use-case!
peepsalot:
I was looking for a cheap programmable bench supply recently, and came across a Hanmatek HM310T (as opposed to HM310P)
https://www.amazon.com/Programmable-Precision-Variable-Switching-Interface/dp/B08TZVZQR6
This one seems similar to HM310P but has 4! numeric displays (an added clock/timer) and looks pretty slick in the pics.
I'm guessing its just an updated faceplate with more-or-less same internals and hopefully same protocol?
Anyone seen/used one of these? I wasn't able to find any youtubes about it or even a single picture in the wild besides the apparently rendered product page ones. Could be a very recent revision/release :-//
Says it could be shipped in a day from amazon though... I'm tempted to pull the trigger but still teetering on the fence.
trcm:
The Rockseed and Hanmateks were all rebadged eTommens units, but this one you link to doesn't appear to be shown as a product on eTommens product page?
The internals have also seemingly changed, a simplified/cheaper BOM perhaps?
HM305P :
HM310T :
(Other HM305P images here : https://sigrok.org/wiki/Hanmatek_HM305P)
peepsalot:
Yeah I'm not sure how much I trust that pic of internals anyways, as it appears to be the mainboard for a programmable 305 model. The markings on the transformer being "TM150-305"
However the 305 variation from the same product listing page is not programmable (and the image of internals for that one is hilariously poorly edited though it appears to indicate that same mainboard, for whatever that's worth):
I also just found what looks like this style of board on another "programmable" (but no interface cable) 30V 5A, rebadged as A-BFastiron :
from here https://www.amazon.com/BFastiron-Programmable-Power-Supply-Variable/dp/B08C531D7T
So what is actually inside that HM310T is anyone's guess at this point...
edit: Also nice to see the 30V 5A version features "Lover Noice" :-DD
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