Author Topic: Youyue 858D+ some reverse engineering + custom firmware  (Read 95756 times)

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Offline Barm

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Re: Youyue 858D+ some reverse engineering + custom firmware
« Reply #450 on: April 21, 2017, 03:34:22 PM »
You brought the bare pcb for or which station?
Just PCB for 15 USD. All I've found is only one seller on Ali who sells 858D boards.
I cant rely on a product and model names, because I believe that most of the factories in china just randomly selects a product names, model names, PCB versions, production batches, quality checks, etc.  :)

 

Offline Shock

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Re: Youyue 858D+ some reverse engineering + custom firmware
« Reply #451 on: April 21, 2017, 06:04:13 PM »
Atten and Yihua are actually real manufacturers that make soldering and hot air stations such as the 858Ds. If you can't find the factory or website for a brand it's probably another product rebranded or something generic. There is also apparently a counterfeit problem even with Chinese brands.

http://www.atten.com/
http://yihua-gz.com/

Offline Barm

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Re: Youyue 858D+ some reverse engineering + custom firmware
« Reply #452 on: April 21, 2017, 10:59:41 PM »
Shock, of course, I know those brands exists.
But it's hard to rely on Aliexpress sellers because selling of a refactored, refurbished and rebranded stuff is a very common, even with a high rated sellers.
Buyers reviews is not a reliable source of information too. In my case - I've received a PCB different from described and reviewed by buyers.
Anyway, I will test this board as soon as I receive my new fan/heater wand. I hope everything will be fine.

So, cooler is marked as 0.2A. How much the main board consumes?
Is 0.3A of 220V/9V/24V transformer enough?
 

Online floobydust

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Re: Youyue 858D+ some reverse engineering + custom firmware
« Reply #453 on: April 22, 2017, 01:13:00 PM »
I just got my YouYue 858D+ station from Aliexpress and did a teardown. The usual tomfoolery.

The wand, base, and box are all labelled "110V" but I found a (cracked) 220V heating element in it. Some math and I get 170W of heat instead of 610W!
A spare heater came free with the unit. 110V 19.8 \$\Omega\$ (610W), 220V 71.6 \$\Omega\$ (675W). I haven't installed it yet, as the heater has heatshrink tubing on the end, not silicone like the present element.

Power transformer is labelled "220V" but is OK on 110VAC.

858D06.PCB 2016.09.29 with MK1840D3 MCU.

I'm drawing a schematic and figured out the hardware, it's pretty basic.

Anyone with 110V version willing to check their heater resistance, see if my numbers are correct.
 

Online floobydust

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Re: Youyue 858D+ some reverse engineering + custom firmware
« Reply #454 on: Today at 01:34:52 PM »
Here is the 858D hand wand schematic and pic showing the heating elements 110V/220V.

A 220V heating element works fine on 110V but struggles to get past 350C. Still struggling with Aliexpress vendor to get this looked after.

The safety ground is a real PITA, had to use silver solder and flux on the stainless steel tube.
Nothing else worked. I could not drill a hole to bolt on a crimp connector, it's military grade, lol.
 


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