It’s been a long while, almost 3 years now, since I sold the last DC2N5-LC DIY kit. I am glad to confirm that kits are available again and I am going to also build a single fully cased device.
For the details and costs, check my sales page.
Yet another change request was implemented in the DC2N5-LC firmware: users can now select the output folder for all dumping operations 🙂
As announced in a previous post, one of the STM32 micro-controllers from a “Blue pill” batch that I bought recently was sent to Finland for decapping.
Well, Tommi received it, decapped it and took the following picture:
Unfortunately, this version of the die doesn’t seem to be able to run code built for STM32F103C8T6, so all the boards are useless to me unless their MCU is replaced.
Today I received another batch of 20 blue pill boards, and what do you know? The MCU is another fake.
This time the fact the MCU is counterfeit can be easily spotted: The font used is too narrow, the first line reads STM32F instead of STM32, the orientation hole is bigger and too smooth, the ST logo is quite different, and the plastic surface has got bubbles in it.
What a disgrace.
I think the new version of the DC2N5-LC firmware is coming along quite nicely 🙂
Stay tuned for more!
As I had received a handful STM32 MCUs, I managed to solder one on the “blue pill” board from which I had desoldered a fake/defective one.
The new MCU seems to be working fine, having tested the DC2N5-LC firmware with it: access to the display and SD card was OK and dumping tapes worked fine too (I tested this 6 times in total to be on the safe side) 🙂
Obviously, having gone through some substantial maintenance, I won’t be selling this device to anyone: it will become part of my own pool of spare devices.
In about 4 days I will get in touch with an eBay representative and state my case about the STM32F103C8T6 modules I had bought, pointing them to these results.
I had ordered a few STM32 MCUs to try and replace a few of the ones that are on the blue pill boards that are not working. Well, today I received such MCUs but I reckon they are in a not quite ideal state:
It’s not that the MCUs can’t be used, but heck, here’s the item picture from the eBay listing I bough them from:
Tiny MCUs like these usually ship in plastic tape so that:
Dealing with Chinese sellers on eBay has rarely been this frustrating…
I finally got the time to desolder the MCU from one of the STM32F103C8T6 boards I recently received. Here’s what the board looks like after the operation:
The MCU will soon be on its way to Finland for de-capping, which will reveal its provenance, possibly based on text on the die itself.
Worst case scenario: the die is a genuine one from STM but either from a defective batch or damaged somehow after manufacturing. That is a possibility, although the MCU looks suspiciously fake, starting from the color (black rather than dark grey) and finish of the plastic case (gloss rather than matt), smaller fonts used for marking the chip, engraving instead of printing of such markings.
I also managed to build another special edition DC2N4-LC device for myself, the white one pictured below, which joins the translucent blue one I built a few days back:
Stay tuned for more news!