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Electrical Engineering

Questions tagged [esp32]

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For questions about the ESP32 series of microcontrollers. Use in conjunction with the "microcontroller" tag.

1,324 questions
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I’m trying to digitally control the output voltage of an SZ-08 buck-boost converter by replacing its onboard W204 (3296) CV trimmer with an RP2040-generated PWM signal filtered through an RC network ...
Will Buckneer's user avatar
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I am a senior at the University of Kentucky and I am working on my senior design project. I'll skip the fluff, I am working on a PCB to connect an ESP-32-C3-DEVKIT to an MCP251863 to do CAN bus ...
Will Hodge's user avatar
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1 answer
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I'm currently trying to use 2 MCP41010 digital potentiometers to control the gain of the output. I have already succeeded in controlling the resistor value with ESP32. The problem came when I couldn't ...
17 Trịnh Hữu Phúc's user avatar
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1 answer
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I want to have a grid of faders/sensors/LEDs/buttons (with ATtiny85s) that I can move around, and that all talk to an ESP that sends data over the network. The idea is to have a PCB with traces for 4 ...
user3161003's user avatar
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I’ve designed a custom IoT board based on the ESP32-S3-WROOM-1, and I would like to have the schematic and PCB reviewed before fabrication. Main features: 4× PC817 optocouplers for reading 24 V square-...
Alessio Lami's user avatar
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I'm using Proteus 9.1 I'm running into trouble simulating a ESP32. From what I know, it should be working. The python file ...
Jason Crosby's user avatar
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2 votes
1 answer
101 views

I want to use a linear CCD-sensor for my project and I bought this old tablet scanner from 2004 - Genius ColorPage-HR7XE. I disassembled all the parts and took out the PCB with CCD-scanner. But I didn'...
Стебан's user avatar
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1 vote
4 answers
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I have an esp32 connected to a 12V circuit. This circuit is supplied by two 12V lead-acid batteries in parallel. The circuit controls a Solenoid using a 12v double pole, double throw relay. This ...
Eduan du Plessis's user avatar
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1 vote
1 answer
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I'm trying to connect I2S microphones to an ESP32, but it seems to support a maximum of only two. Is there any way to achieve that?
humni's user avatar
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1 answer
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I've built a (bird) sound record around an ESP32 with a DS3231 RTC for accurate time stamping. The recorder goes into deep sleep mode when not actually recording, which is typically set to 3 minutes ...
ceperman's user avatar
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6 votes
4 answers
2k views

Context I know this might be a silly question but, according to this page the typical voltage drop for a blue LED is between 3V and 3.7V. A couple of weeks ago when I was designing an LED resistor ...
Daniel Cruz's user avatar
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2 votes
2 answers
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Note: sorry, I don't have a lot of experience, so I don't know what information is fully relevant. So for the specific question go to "Questions". Before, I give a bit of context if you want ...
Daniel Cruz's user avatar
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I’m trying to add remote control to an existing low-power circuit. Between two contacts (labeled 6 and 7 in my schematic), there’s a voltage ranging from 3 V to 5.5 V and a current between 50 µA and ...
Luigi's user avatar
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I am kind of new in the field and I am attempting to set up a stereo I2S microphone array using two ICS-43434 MEMS microphones on an ESP32 TTGO T-Beam board. My code successfully compiles and runs, ...
3izmanique's user avatar
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49 views

I am working on a custom RF module. This is my first experience. If you know of a book or resource on this subject, I would appreciate your guidance. So far I want to use an SOC with built in RF (ESP)....
hossein hamzekhani's user avatar
  • 97

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