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Schottky Issues: how does it work?

Hey All. I need some help due to my lack of understanding. I am planing a power supply für my esp32 devkit project....
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Small Arduino

What is the smallest board I can use to run a very simple project to slowly flash 5 LEDs ? I need to run from a small battery....

How to Connect this LCD to my Arduino R3 [Beginner]

Hey there! I am new to Arduino and tried to find tutorials on wiring this up... I couldn't find much help on websites and am wondering how I would connect this to my Arduino R3 and possibly code it with the LiquidCrystal library. Any help is greatly appreciated! [Edit] Since it's not allowing me to attach a photo, the exact model im using is the https://www.adafruit.com/product/4313 You can find its ports in the images on that website...

New sensor BMV080 on Shuttle Board 3.1

Looking for someone who had touched the new BMV080 particulate matter sensor, especially with Shuttle board 3.1 . I'm Struggling of making the Shuttle Board 3.1 on which is installed the BMV080 sensor to work with ESP32....
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HC-05 Bluetooth Module Not Responding to AT Commands

Hey everyone, I'n new here! I'm troubleshooting an issue with my HC-05 Bluetooth module, and I could use some help. I'm trying to enter AT mode to configure settings, but I’m not getting any responses in the Serial Monitor. Here's what I've checked so far: The HC-05 is in AT mode (blinking once every 2 seconds). TX/RX are connected properly (Arduino TX → HC-05 RX via voltage divider, HC-05 TX → Arduino RX)....

nano serial chip broken?

Heyas! I got a free nano, I don't know the history other than someone clipped off the ICSP header pins (presumably to make it fit better in a pedal or something). It powers on. It has never been detected as a serial device. The cable I'm using works fine for other USB data hardware. I suspect the CH340C chip is fried but have been poking the nano to see. I've read forum posts that say to never use the ICSP header pins to upload sketches after burning a new bootloader - why is this? If we shouldn't load sketches via ICSP after burning a bootloader, what do we do next so that we eventually CAN load sketches? ...

How do I write code by using datasheets and schematic?

As the question implies, I've come across that it's important to read datasheets and schematics, but from there, what do I do? I understand that it is supposed to help me in some way, but how do I apply that written information into code? I am a beginner:p specifically, I'm looking at this schematic: https://content.arduino.cc/assets/SchematicNanoMotorCarriers.PDF...

is it alright, if i connect my mega2560 and R3 to tx and rx?

so basically, i was doing an test with my arduinos since im kinda new to this arduino stuff, and when i plugged my 2560 in first, it lit up and so did my arduino R3 which wasnt connected to a USB port. is this normal? does it damage anything? it really scares me since i dont want to damage my hardware

GY-BN008X with Arduino Mega 2560 Wiring Issues - Unable to detect device with I2C

I have tried to wire this as per help with some forums and ChatGPT and it doesn’t seem to be working… I am trying to use the I2C scanner to find the device and am unable to. Looking for feedback and direction here, this is my first project.
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HC-12 problems

I bought some hc-12 radio breakout boards a while ago and I can't for the life of me get one of the boards to do anything related to AT mode for programming, I was able to get the other board to be programmed but I am struggling to get anything out of the other one)

Motor and esc have power, cant control them

motor beeps when plugged in but nothing after, no movement at all. any and all help appreciated. Motor doesnt turn. motor beeps when powered. Im just trying to get it to spin at all and nothings happening. it will be apart of a drone and will have others connected similarly but not even this one works. Both esc and motor were purchased on amazon and do not provide datasheets. The ESC's brand is aneegfpv, it is a 40a max ESC with 2-6s input which is in range of our lipo. The motor is CENPEK A2212 1000KV Brushless Motor 13T. multiple variations of code has been tried. Codes: #include <Servo.h>...
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Sim module + Arduino cloud

I want to remote an esp32 remotely and i think ill buy some sim module for that. can i use that to access Arduino cloud so i can use the nice ui?

L293D driver Shield and ESC with Arduino uno r3

I am building a project where i have to use both esc 30A(for bldc motor) and an L293D driver shield(for 4 n20 6v 60 rpm motors). Since the driver shield is stacked upon the Arduino uno, and all the pwm pins are used, how do i connect esc?

Upgradable connections?

I have a circuit board of an rc plane, which i had to open (of course). I want to not only put it back, but also be able to remove the connections and test them on a breadboard or something similar. The circuit board is unlabelled, but i know what everything does. There are two motors, a battery connector and two LED's connected to the same + & -. Images are attached. If there nothing such, what are those battery connectors called?...
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DHT11 Humidity sensor not reading.

I am using a keyestudio DHT11 humidity sensor. I have checked the wiring multiple times, so I think it is correct. The error that it gives me switches randomly between 16,12 and 16,16. I have attached a photo of the arduino and where the wires are connected.
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Power supply for ESP32 and hardware

Hello dear community, I am currently working on a project that I would like to present later in the showcase. However, I am currently failing due to my lack of experience in the area of power supply. Short version: I have an ESP32, a WS2812b ring with 16 LEDs, an HC-SR04 and possibly a vibration module. The whole thing comes in a housing with a USB-C socket as a connection - basically a lamp for an art project. According to my calculations, the power requirement at full load would be at least 1.4 A....

Joystick buggy with ESP32

Hello. I uploaded a simple code to read joystick values to my ESP32 but the values aren’t reading the usual 0-1023 and instead are lying between 0-4095 with the values constantly fluctuating even when centered. I assume it has something to do with the hardware and connections messing with the signal but just in case I’ll show the code too
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Trying to get nrf905 to work

Hi everyone, i am trying to make my nrf905 work with an esp32s3, but i am starting to give up… I tried a lot of different ways, trying all the available libs with exemples, notions worked. for exemple the Radiohead library shows that the modules are correctly initialized, but no communication happens, even on my sdr i cant see any communication....
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HC05 Connectivity Problems

Hello, i have a HC05 bluetooth module and whenever i'm trying to connect (on an Android) instead of a password field nothing shows up and then it doesn't connects and shows up at earlier connections. On an iOS device the HC05 doesn't even show up.

Question about esp32 battery connection

So I’m planning to use a 3.7V LiPo battery to power an esp32 project. I’m confused on whether or not connecting it to the 3.3v pin is a good idea or if I should connect it to a step down converter first. Is it better to use the onboard regulator and will it even work properly or will I fry my board if I don’t use the step-down