Search found 516 matches

by OutoftheBOTS_
Thu Nov 30, 2017 2:49 am
Forum: ESP8266 boards
Topic: over clocking
Replies: 7
Views: 787

Re: over clocking

OK thanks guys

I wasn't expecting it to be that easy

I will read away and have a play :)
by OutoftheBOTS_
Thu Nov 30, 2017 2:46 am
Forum: ESP8266 boards
Topic: PWM on ESP8266
Replies: 10
Views: 1738

Re: PWM on ESP8266

Well that's certainly fast enough updates even with multiply channels. The PCA9685 also is very small in size and cheap to buy too. It is definitely an option to think about. Thanks
by OutoftheBOTS_
Wed Nov 29, 2017 9:16 pm
Forum: ESP8266 boards
Topic: PWM on ESP8266
Replies: 10
Views: 1738

Re: PWM on ESP8266

Yes I do have a PCA9685 that I use for my hexapod robot and my worm robot that uses a lot of servos. One of my biggest factors always with all my robots is available space. I am trying hard to avoid using too many external chip like the encoder counter chip and PWM chip (using a external h-bridge ca...
by OutoftheBOTS_
Wed Nov 29, 2017 8:57 pm
Forum: ESP8266 boards
Topic: over clocking
Replies: 7
Views: 787

Re: over clocking

ok so next question how do I get my ESP8266 to run at the 160mhz with micropython??
by OutoftheBOTS_
Wed Nov 29, 2017 11:43 am
Forum: ESP8266 boards
Topic: over clocking
Replies: 7
Views: 787

over clocking

From what I can understand it seems that the ESP boards have an over clocking feature. They can run at the standard 80mhz or with the change of 1 bit they can run at 160mhz. Id this feature possible to use in micropython and if so what is the down side to running the biard at 160mhz??
by OutoftheBOTS_
Wed Nov 29, 2017 7:45 am
Forum: ESP8266 boards
Topic: PWM on ESP8266
Replies: 10
Views: 1738

Re: PWM on ESP8266

I am currently using 40khz rate as this tends to be a fairly standard rate for PWM of motor control. The lower the rate the more efficient the H-bridge tends to be because of less switching delay in the transistors but if you go below 40khz then u get in the human hearing range and you will hear a h...
by OutoftheBOTS_
Wed Nov 29, 2017 6:26 am
Forum: ESP8266 boards
Topic: PWM on ESP8266
Replies: 10
Views: 1738

PWM on ESP8266

I am using PWM for speed control of my motors through a H-Bridge. The H-bridge uses PNP transistors so it is backwards in that when it is pulled to high the h-bridge is off and when pulled to low it is active. This is the issue that I am finding. Everyone once in a while my robot will suddenly accel...
by OutoftheBOTS_
Tue Nov 28, 2017 4:14 am
Forum: ESP8266 boards
Topic: strange start behavoiur on vertain pins
Replies: 3
Views: 446

Re: strange start behavoiur on certain pins

Thanks you very much this explains why I was having the problems that I did. Yes I have a dev board with crazy pin numbering but have a cheat sheet of what the correct names for pins are :) Ok my H-bridge doesn't pull anything up or down but my encoders do depending upon the exact position they r in...
by OutoftheBOTS_
Mon Nov 27, 2017 8:31 pm
Forum: ESP8266 boards
Topic: strange start behavoiur on vertain pins
Replies: 3
Views: 446

strange start behavoiur on vertain pins

Ok I have my robot working now but it was a battle with what I connected to what pin before it would work on startup or reset. Some background. It is a basic 2 wheel drive robot with drag caster wheel. The motors have quadrature encoders and the H-Bridge(L9110S) that I am using uses PNP so the H-bri...
by OutoftheBOTS_
Mon Nov 27, 2017 8:21 pm
Forum: Drivers for External Components
Topic: A library for reading rotary encoders (ESP-8266 and Pyboard/stmhal)
Replies: 22
Views: 9957

Re: A library for reading rotary encoders (ESP-8266 and Pyboard/stmhal)

This leads to other questions about the RTOS and WiFi. Obviously I have chosen the ESP chipsets family because of its WiFi ability. Is there a way to adjust priority level of the wifi and how much resources it consumes. Does running its own access point consume more resources than being connected to...