Tag Archives: youyue

YOUYUE 858D+ hotair station — Release V1.45

A small but helpful upgrade, if you’re into acquiring your own temperature calibration data. At some undetermined time in the future this might be expanded to a full multi-point calibration mode. The config menu was amended with the parameter ‘display_adc_raw’. … Continue reading

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YOUYUE 858D+ hotair station — Bugfix release V1.44

I’m glad to announce that the annoying watchdog issue has finally been fixed. It was a dumb error on my side, combined with a prevalence in some ATmega chips to have certain binary values in uninitialized registers after a cold … Continue reading

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YOUYUE 858D+ hotair station — BLDC Fan-speed mod

I’ve finally forced myself to layout a small board. It’s been far too long anyway. It consists of these building blocks: reference voltage, comparator, RC low-pass, gain. There are better methods for the job, e.g. using a digital one-shot to … Continue reading

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YOUYUE 858D+ hotair station — reverse engineering #6

Adding some more stuff is always fun.

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YOUYUE 858D+ hotair station — reverse engineering #5

The lack of an ISP connector on this board has given me a lot of grief. This little adapter board will solve that problem once and for all. It also provides a couple of through-hole pads for potentially adding some … Continue reading

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YOUYUE 858D+ hotair station — reverse engineering #4

Possibly (and hopefully) the last post in this little hot-air station series. I’ve opened and closed that device far too often – and popped out the chip multiple times in each instance. You see the designer failed to add a … Continue reading

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YOUYUE 858D+ hotair station — reverse engineering #3

After tweaking some control loop parameters and adding a hard-limit for the temperature (heater cut-off + resetting the error term, effectively restarting the loop), the massive temperature overshoots are a thing of the past. I declare this a success. “Some … Continue reading

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YOUYUE 858D+ hotair station — reverse engineering #2

In part one I dealt with the very basics: fan control, buttons and the display. Now it is time to attack the business end of this device! Safety warning / disclaimer: Please understand that operating a device powered by line-voltage, … Continue reading

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YOUYUE 858D+ hotair station — reverse engineering #1

The YOUYUE 858D+ I have in my possession uses an AVR ATmega8 microcontroller to control the fan-speed, drive a 7-segment display, read 2 buttons and drive the TRIAC via an opto-isolator.

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YOUYUE 858D+ hotair station — usage & quirks

In a previous post I had taken a look at the innards of said soldering station. Now it is time to see if it is usable. I tested it in several ways…

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YOUYUE 858D+ hotair station — teardown

This device seems to be a clone of several other branded ones out there. The Atten / Aoyue 858 come to mind ;-) I bought it on ebay for 38€ delivered.

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