Search found 160 matches

by fma
Mon Mar 25, 2019 1:17 pm
Forum: ESP8266 boards
Topic: Getting started with ESP-12S
Replies: 2
Views: 173

Re: Getting started with ESP-12S

Hi Matt, Integer. The PWM capabilities of the ESP8266 are quite weak; a maximum base frequency of 1KHz and 10bits of duty (ie 1024 levels). That said, I don't understand your math; how did you arrive at 75 positions? For servos, you have to set the period to 50Hz. So, max value, 1023, is 20ms. As th...
by fma
Mon Mar 25, 2019 8:23 am
Forum: ESP8266 boards
Topic: Getting started with ESP-12S
Replies: 2
Views: 173

Getting started with ESP-12S

Hi! I will soon drive my 24DoF hexapod using my Python framework¹ on a RPi, with a custom shield using 2 PCA9685; all movements (synchronized) are done in Python. But I would like to test another solution : having a node per leg, to drive the 4 servos, and also read some inputs to detect the ground....
by fma
Wed Dec 06, 2017 5:52 am
Forum: WiPy and CC3200 boards
Topic: Marty's back from the future!
Replies: 3
Views: 1032

Re: Marty's back from the future!

Thanks!
by fma
Tue Dec 05, 2017 6:22 pm
Forum: WiPy and CC3200 boards
Topic: Marty's back from the future!
Replies: 3
Views: 1032

Marty's back from the future!

Hi! I'm finally making tests with my Wipy 1.0 (kickstarter) boards... My first project is to replace an Arduino I used to make a fancy Stargate clock, using RGB bus leds. The nice thing is I will be able to automatically sync with a ntp serveur to set the current date/time. I used a recipe for ntp, ...
by fma
Fri Mar 18, 2016 9:51 am
Forum: Drivers for External Components
Topic: epaper driver for the Pyboard
Replies: 21
Views: 7261

Re: epaper driver for the Pyboard

Great work! Thanks for sharing.
by fma
Tue Sep 29, 2015 2:31 pm
Forum: Drivers for External Components
Topic: T6963C LCD Graphics Controller Chip
Replies: 2
Views: 2860

Re: T6963C LCD Graphics Controller Chip

Yes, I know these projects; I'm working on the Arduino library, to clean it up. Then I will start to port it to micropython.

The idea is to dedicate a pyboard as a LCD interface, to build some sort of VT100 terminal.
by fma
Tue Sep 22, 2015 5:38 am
Forum: General Discussion and Questions
Topic: Servo resolution
Replies: 10
Views: 3538

Re: Servo resolution

Thanks for you answer! Good hobby servos have resolutions of 2-3µs, I guess. Even the chineese one I'm testing, which is pretty bad regarding resolution, takes avdantage of a 1µs resolution, over 10µs... It is really simple to change the timer5 init in micropython code, so the Servo class has 1µs re...
by fma
Sun Sep 20, 2015 2:08 pm
Forum: General Discussion and Questions
Topic: Servo resolution
Replies: 10
Views: 3538

Re: Servo resolution

Yes, no problem for a fix pulse width, but what the Servo class does, and your examples don't, is managing the pulse width variation speed...
by fma
Sun Sep 20, 2015 7:43 am
Forum: General Discussion and Questions
Topic: Servo resolution
Replies: 10
Views: 3538

Re: Servo resolution

dhylands wrote:(or convince Damien to allow it to change)
I vote for this solution ;)

Damien, could it be possible to:
- have 1µs resolution (timer5 config)
- add a 'time' parameter to the pulse_width() method, so it works like the angle() method, allowing precise control over position/speed

Thanks!