Search found 202 matches

by Vader_Mester
Tue Sep 18, 2018 6:53 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 237
Views: 36182

Re: What would you like to see in The Next Chip?

I think the inclusion of a 6LoWpan radio interface would make it such a widely usable solution!
by Vader_Mester
Mon Sep 17, 2018 2:29 pm
Forum: General Discussion
Topic: Esp32 and audio (text to speech)
Replies: 4
Views: 100

Re: Esp32 and audio (text to speech)

A better approach would be to get a sample lybrary in a .wav formats, convert it down to 8kHz sample rate PCM (10bit or 8bit for speech is enough), and store every sample as a binary array in a header file, with every character having it's own array. This is the way people store character font info ...
by Vader_Mester
Fri Sep 14, 2018 11:13 am
Forum: Showcase
Topic: FT81X shield for ESP32 DevKitC
Replies: 9
Views: 357

Re: FT81X shield for ESP32 DevKitC

After suggesting, I included an audio circuit into the Schematic. First post updated.
by Vader_Mester
Fri Sep 07, 2018 1:31 pm
Forum: Showcase
Topic: FT81X shield for ESP32 DevKitC
Replies: 9
Views: 357

Re: FT81X shield for ESP32 DevKitC

To inhibit the voltage I layout jumper pins directly in front of the devC board usb connector with a tall jumper :D . The jumper physically prevents inserting a usb cable but connects internal power when installed. Remove for development. If that is what that rpi circuit is for. https://www.digikey...
by Vader_Mester
Thu Sep 06, 2018 1:48 pm
Forum: Showcase
Topic: FT81X shield for ESP32 DevKitC
Replies: 9
Views: 357

Re: FT81X shield for ESP32 DevKitC

Which display you've had in mind for the 50-pin connector? On Buydisplay I couldn't find any matching your 50-pin connector pinuot. I have one of this, and also in it's devboard version. https://www.buydisplay.com/default/serial-spi-3-5-inch-tft-lcd-module-in-320x480-optl-touchscreen-ili9488 https:...
by Vader_Mester
Thu Sep 06, 2018 10:07 am
Forum: Showcase
Topic: FT81X shield for ESP32 DevKitC
Replies: 9
Views: 357

Re: FT81X shield for ESP32 DevKitC

The reason is quite simple: I wanna make this thing as simle as possible, with minimalistic BOM, easy assembly. I don't want to spend more work with this yet until the software is figured out, for which this board is totally enough. Audio was not a key design goal, as (as far as I know) it is pretty...
by Vader_Mester
Wed Sep 05, 2018 1:26 pm
Forum: Showcase
Topic: FT81X shield for ESP32 DevKitC
Replies: 9
Views: 357

FT81X shield for ESP32 DevKitC

REV. List: V1.0 - Initial version V1.1 - Updated connector names, added jumper to CON3, added pull-downs to CON2 Pin 35,39, Corrected descriptions here'n'there. V1.2 - Included audio circuit as mentioned in Datasheet of FT81X. So, what a good way to start after switching to KiCAD? Design a board lo...
by Vader_Mester
Tue Aug 28, 2018 6:47 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 237
Views: 36182

Re: What would you like to see in The Next Chip?

- I think that having a ports that could drive 1A or more would be awesome No MCU or SoC around the world can provide 1A on GPIOs ! It is up to you to add some MOSFET to drive such current ... - Sleep power modes that have WOR (Wake On Radio) feature. (beside other waking functions) WOR can not be ...
by Vader_Mester
Wed Aug 15, 2018 8:42 am
Forum: General Discussion
Topic: Power amplifier/operational amplifier in ESP32
Replies: 6
Views: 336

Re: Power amplifier/operational amplifier in ESP32

Honestly, I would not use the OPamp in the ESP, rather an external one, or a PIC with a built-in OPamp, which will do the conversion and use either SPI or I2C with the ESP to do the data sharing.
by Vader_Mester
Tue Aug 14, 2018 7:21 am
Forum: General Discussion
Topic: Power amplifier/operational amplifier in ESP32
Replies: 6
Views: 336

Re: Power amplifier/operational amplifier in ESP32

Hello Ahmed, designing with esp-idf you can call "make menuconfig" and set the PA output power, check line 1064 of https://github.com/espressif/esp-idf/blob/master/components/esp32/Kconfig Actually this mentioned section it's not for the OPamp, rather the wifi. I just noticed that the OPa...

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