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Nick Alexeev
Nick Alexeev
5:02 PM
@AnindoGhosh I'm currently looking at DRV8850. TI has got a few neat drivers for low voltage motors.
 
Anindo Ghosh
Anindo Ghosh
@NickAlexeev Yeah, TI has some amazing ULV motor control parts.
 
 
2 hours later…
Scott Seidman
Scott Seidman
6:37 PM
Anyone know the current status of Coocox? Is he dead, Jim?
 
Kamiccolo
Kamiccolo
6:47 PM
in C on Stack Overflow Chat, 2 mins ago, by Kamiccolo
@NickAlexeev mhm. STM was pushing some other environments for years no. I'd guess that it's long dead.
in C on Stack Overflow Chat, 53 secs ago, by Kamiccolo
and all the other vendors. Keil, IAR, etc. to go.
 
Nick Alexeev
Nick Alexeev
@Kamiccolo Which IDE is the STM pushing these days?
 
Kamiccolo
Kamiccolo
@NickAlexeev well, haven't been doing anything with STM last couple of years... But I do remember some online solutions and parts. And, of course, IAR, Keil, ... and all the other Eclipse based crapware.
 
The Photon
The Photon
7:08 PM
@NickAlexeev I think they have their own now. But it's pretty new. And the full time firmware guys I work with don't like GCC for STM.
(at least, Cortex-M0 or M0+ parts)
 
Kamiccolo
Kamiccolo
@ThePhoton yup, there was something... STM32CubeIDE? Or some other abomination in the body of Eclipse :|
 
 
3 hours later…
Nick Alexeev
Nick Alexeev
10:05 PM
In an ideal DC motor, no load speed means no torque, the voltage across the motor is zero (back EMF is equal to supply voltage), there's no current. [Please correct me if I'm wrong.]
I've got a datasheet for a [real] DC motor, which specifies
no load speed 2700rpm ±5%
no load current 0.22A max
Does this mean that the motor may use up to 0.22A to generate torque that's needed to overcome frictions internal to the motor?
Can I calculate the motor's internal friction torque [no load torque? ;) ] from this current, if I know the torque constant?
 

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