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09:02
It is amazing how googles recommended videos list can get worse with every new revision...
09:43
ebay.de/itm/382149832102 why did they not accept my offer of 100EUR ...
10:05
@PlasmaHH It's new 19000 through random outlet, so random person with no use for it (any knowledge of how they work and proper handling?) should be able to ask a second hand price only 3000 lower.... it's obvious
 
1 hour later…
11:26
I don't quite get what the D9 zener is for... i.sstatic.net/IDYnE.png
 
1 hour later…
12:36
@PlasmaHH . . . D9 would reduce the 15 volts to 10 volts (approximate), maximum gate voltage on SCR
I don't see a maximum gate volts on data sheet, but it is a sensitive gate SCR
Egads, L1 is 4 Henry's ?
@Marla it isa motor
and that SCR is actually a different one, I didn't have a model for it though, took another similar one
cdn-reichelt.de/documents/datenblatt/A400/FS0802MH-FAG.pdf is the datasheet for the real one that is installed
Well, it still looks like gate current maximum could be about 400uA
or 600 uA without D9
12:52
simulation says 437µA with and 606µA without
keeping gate power dissipation low. Also reducing loading on the +15 buss.
yeah, the 15V bus has very little capacity
also notice the 1/2 VCC divider doesn't have a bypass capacitor
the virtual ground
which is ok in simulation
maybe :)
well, its the reverse engineering of an existing circuit
@Marla Bad design is the second oldest profession
12:57
I am not quite sure if the virtual ground is really supposed to be one, it goes between ~3V and 12V have a look at R11 feeding back to there
Using R11 for positive feedback (hysterysis), 10K, perhaps the original designer didn't want a bypass capacitor on the virtual ground.
yeah, was typing the same here as I looked
R8 and R9 is a potentiometer ?
@PlasmaHH
@Marla yes, they are to set the pwm duty cycle
 
1 hour later…
14:04
Hi, which uC would you recommend to build an ESC which can support SimonK firmware and possibly have a CAN interface? Thanks
@Anelito Which microcontrollers support the SimonK firmware?
whatever that is
14:26
@W5VO github.com/sim-/tgy is ATmega compatible
15:25
@Anelito So look for an ATMega with a CAN interface
Looks like there aren't that many, so get the one with the biggest program memory just in case
if... IF... a assembler library is actually compatible with those. Especially one that committed half the files with the note that a few LED functions were changed. I don't trust repo's that push 50% change with a single sentence. ESPECIALLY not assembler ones.
15:41
I mean, going from [RANDOM SERIAL PROTOCOL] to CAN is going to be a significant effort regardless
15:53
@W5VO True, but, you know, chucking in a whole bunch of random assembler is often not as helpful as it may seem. And in that I already assume the reader understands how unhelpful it should seem at first glance.
@Asmyldof I didn't even look at the code base. It's a lot of ASM? Sounds like you'd be better off learning BLDC control from scratch
People either go to ASM because they're crazy or they need cycle-accurate results, either of which is a warning sign when you're wanting to do major modifications.
16:49
It always feels a bit weird attaching a scope to something with mains power
16:59
welp, DHL told me it'll arrive tomorrow
17:19
The nuke?
@PlasmaHH the scope, silly
also, does someone want to try to identify a random circuit I found in my drawer?
maybe I should just post to main
are "identify from a photo" posts acceptable?
Sometimes, with shown effort of trying yourself. Here is possible too
The nuke sounded better...
@PlasmaHH well, go ahead
single sided, looks handmade
The other side would reveal more about being handmade
@PlasmaHH no mask, copper slighly corroded
but hey see for yourself
I have no idea where I got it from
17:31
At least it looks horrible
What's that red thing in the middle of the component side
@PlasmaHH actually no idea, but I broke it off and it looks burned
If you really want to post it on main, then with the three photos and a schematic
@PlasmaHH I don't think I care enough to create the schematic
was looking more for a "oh it's a useless thing doing x, scrap it for parts" or "oh this is actually a versatile and nice module"
There are parts missing, might be the key to understand what it is
No, it is no nice module for anything
@PlasmaHH I don't think those empty sposts were used ever
looks like optional components someone didn't bother with to me
17:50
That doesn't mean they are not key to the design. Might have been difficult to source parts. Of the project was abandoned halfway through
@PlasmaHH hm didn't think about that
18:26
Between structural and behavioural HDL implementations, am I correct in assuming that behavioural would be more efficient in terms of resource usage for FPGAs?
Because the CAD tool can optimize place and routing for a given algorithm
But that wouldnt be possible in a structural implementation since the compiler would has a set specification that it needs to implement onto the FPGA
Sounds like a definite "maybe"
18:42
So theres no definitive answer?
Like it just depends on the implementation?
 
2 hours later…
20:59
Altium question time: Is there a way to tell the layout editor "these two parts will never be stuffed in the same variant, so don't give me a violation if they collide"?
 
1 hour later…
22:24
hey there @ThePhoton -- and good question, I wouldn't know
@W5VO There are many good reasons to work in Assembler, I keep saying this. However, most people that do, especially with Atmels and PICs don't actually have any of the right reasons to do so
@ThePhoton Other than making a design rule for that....
hey there @Asmyldof
Hiya
@ThePhoton Since you're off for a bit and the fun discussion isn't going to happen before I leave for bed in a couple minutes...
Something like:
CompParameterValue(‘DesignVariant’) Like 'VariantOne'
Where you added a parameter in the schematic called "DesignVariant" and give it a string value that you can compare to, such as VariantOne
i.e.:
Rule:ComponentClearance_VariantOneTwo::
Where one matches:Custom:
CompParameterValue(‘DesignVariant’) Like 'VariantOne'
Where the second matches:Custom:
CompParameterValue(‘DesignVariant’) Like 'VariantTwo'
And then set all values to 0
22:51
@Asmyldof I ended up just making the placement clearance -1000 mm for a certain footprint.

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