There are newer versions of the stmbl and multiple add ons but the development 
is on hold at the moment because there is a problem: selecting parts, design 
the board  and just before ordering boards most of the parts will become 
unoptanium rinse and repeat. I hope it will change in the next month. 

> On 16. Oct 2022, at 14:03, Markus Bechtold <mar...@r-bechtold.de> wrote:
> 
> This problem with the power stage is solved there is a solution with a new 
> High power powerstage 
> 
> The main problem at the moment is that some critical components like the 2 
> stm32 are not available (as of today there is a delivery date 10.03.2023) The 
> stmbl uses some features of this stm controllers like the internet HIghspeed 
> comperators and Shunt opamps.
> Hopefully there will be new stmbl as short as possible if the craziness of 
> the chip market will normalise and you have not to pay something like 45€ for 
> a stm32 
> 
> 
> 
>> On 16. Oct 2022, at 08:41, Roland Jollivet <roland.jolli...@gmail.com> wrote:
>> 
>>> Now.  Why is it not available?  Two reasons.  The key thing about the
>>> STMBL for 3 phase AC servos was that it used single driver for all three
>>> windings.  Probably originally designed for washing machines.  It was
>>> discontinued.  A different one with slightly lower power was available.
>>> There are others but different pinout so board change.
>>> 
>> 
>> Yes, the same style driver chip found in all the chinese drives too. A
>> 27pin PDIP
>> I opened a Chinese drive up and it looked to be a text-book implementation
>> of one of these drivers. With very little noise suppression though.
>> 
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