Products > Test Equipment

FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator

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engrguy42:
Thanks much. I sure appreciate it.

I've got the Koolertron version (pretty much identical to the Feeltech and others), and I've been quite impressed at what you get for 80-90 bucks. Even the USB/PC software was VERY surprising, allowing you to build waveforms and stuff. It actually works.

Johnny B Good:

--- Quote from: engrguy42 on March 23, 2020, 11:22:21 pm ---Thanks much. I sure appreciate it.

I've got the Koolertron version (pretty much identical to the Feeltech and others), and I've been quite impressed at what you get for 80-90 bucks. Even the USB/PC software was VERY surprising, allowing you to build waveforms and stuff. It actually works.

--- End quote ---

 From what I've been able to glean off the interweb, this Koolertron branded Junctec GH-CJDS66 is a totally different beast to the Feeltech FY6600 that's been the subject of many many different modification projects in this topic thread. If this is still the case, as it appears to be (for all I know, it's just possible that Koolertron may have recently decided to abandon the Junctec version and sell the FY6600 as an alternative rebranded offering instead), then virtually everything that has been discussed in this thread simply won't apply.

 The most obvious distinction between the FY6600 (and its successors) and the Koolertron GH-CJDS66 is the use of an external 5V 2A rated wallwart to power it via the customary co-axial DC jack, eliminating not only the regulatory need to get the various safety certifications for an appliance powered by an internal Class II smpsu but also the expense (as cheap as the unit used in the Feeltech products was) of a 3 rail smpsu board.

 The other most striking difference between the Koolertron version and the Feeltech units is the Koolertron's use of a 10 digit frequency display versus the 14 digits of the more cramped Feeltech's display. If yours matches the descriptions above, then you'll most likely only be able to get general help and advice from this topic thread.

 JBG

ThaZ:
I've version V3.3 as firmware in the FY6600-60Mhz  ::)

darkspr1te:
Hi All,
 I'am asking if someone could give the tl;dr on the current status of firmware dump, I was asked by another forum user to look into this as I recently was able to dump a locked stm32f103r8 device and can confirm it works on on 105/107 devices too, How ever it's not perfect and requires certain things to hand tool wise to achieve.
I would be will to assist with these methods if we still have nothing on the unit.


darkspr1te

DC1MC:
Well, as I am the "culprit" for asking ;), I will give you a status update:

1) There is no public unencrypted firmware dump of the original firmware.

2) There are a couple of encrypted upgrade firmwares, but because the upgrade function was not available on the early models (the ones with actually bad firmware bugs) the buyers had to either pocket the loss or insist, and, in some cases, being given a replacement front panel or a replacement programmed chip.

3) A number of community members, the shining star being fremen67, have devised alternative firmware to be used with some Arduino compatible boards (aka "Blue Pill").

4) A full firmware dump and the extraction of the encryption key to decode the updated firmwares will allow the people that still have older, non-upgradable units to update to the current version of the firmware.

5) Also, the possibility to save and restore the factory firmware will open the unit for experimentation and improvement.

6) I have such a unit and happily do any soldering and experiments that you require to extract the fw if possible an help time passind during the quarantine.

 Cheers,
 DC1MC

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