Question about division with float variables
Hello all, I'm getting results which I am not understanding using the same division with fixed values vs global variables - which are float variables. Below - I have function1 and function2...
View ArticleHeap fragmentation / memory with webservers/http clients
Recently I spent a lot of time trying to track down some heap issues on an ESP32 project (Arduino framework). In the end it seems like everything is OK: heap goes up and down but doesn't actually...
View Article1khz tone generator
Hello, I am trying to decide if i can make a 1khz tone generator for testing cb/ham radio transceivers into my oscilloscope to accurately look at the rf envelope. I already tried this once before but...
View ArticleSerial Port Coms don't work when shield is on.Upload Issue with Shield on
Hey yall. This is my first project so total noob, but I am fairly tech savvy from time to time buuuut... I have my Arduino Uno connected to my Mac. On the Uno is a CNC shield. When I tried to upload...
View ArticleArduino Uno R3 damaged from overvoltage. What needs to be replaced?
I have had my Arduino Uno for many years now, and it continued to work until just recently. I had it connected to both my computer via USB and a 12V wall wart at the same time (which I read is safe)....
View ArticleEsp32 + stepper motor
Hi, I'm trying t o connect my ESP32 to this stepper motor(17HS19-2004S1): https://www.amazon.pl/STEPPERONLINE-krokowy-Bipolar-przewody-drukarek/dp/B00PNEQKC0 using a driver (drv8825):...
View ArticleButton Up/Down has a quirk... Quick fix?
Hi everyone! I have another question about this dang switcher... but it's working pretty well at this stage! The last real quirk revolves around the BANK button. I have setup 9 banks for storaging 9...
View ArticleCan I run an LCD on an UNO and everything else on a MEGA?
HI everyone! I have an Arduino mega, and it's got plenty of pins - but I'm getting a little concerned about the power draw that I'm going to be using for a project (I've posted about it a couple time...
View ArticleSoftwareSerial.h
I am using Arduino Nano. Below is the line to include SoftwareSerial. I understand that this is a built in library (and is NOT required to be installed) > #include <SoftwareSerial.h> I get...
View ArticleVoltage under load is incorrect
I've built an RC battery discharge for 1s and 2s Lipo batteries. It has been an extremely fun project, but there have been slight issues along the way. The current issue I am working on is the voltage...
View ArticleI2c wiring library, master and slave and eslov port with GPS
Hi, I am trying to do simple thing, I have an arduino nicla sense me and I have connected the MKR GPS module to it using eslov port (i2c). At the same time I have the arduino connected to a Raspberry...
View ArticleEsp 32 Ota update via Wi-Fi and local website. Memory partitioning error(?)
Good day! My task is as follows: increase the amount of esp 32 memory to 4MB (because I use bluetooth and wi-fi in the same project). I have broken down the partition table as follows: # Name, Type,...
View ArticleElectronic drawer latches
Hi. I’m just throwing this out there to see if anyone has done something like this or has any ideas. I’m wanting to provide electric latching for the drawers in our kitchen. Imagine fairly wide...
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ICSP Wiring Problems on the ATMega32u4
I'm trying to program a bootloader into my ATMega32u4. It's on a custom PCB, And here are the schematic files: and here's the full avrdude log: >>>: avrdude -c usbasp -p m32u4 -P usb -b...
View ArticleRFID + Stopwatch 7 Segment
Hi legends, I'm working on a project that runs a stopwatch based on the below conditions Inputs Day start pushbutton: To start the program Reset pushbutton: To reset the stopwatch counting 0 – 10v...
View ArticleDynamixel - Current ( XM540-W270-R
Hey! I control my servo via a Nextion. Well, the angle can be adjusted to -90 or 90 degrees. But now I would like to control the current of the servo via the Nextion and have the value displayed on...
View ArticlePlaying a WAV file on a speaker with an SD Card
Hey guys! I was wondering if anyone knows how to interface an SD Card with a speaker. In other words how to play a WAV file originating from an SD Card with a speaker. I already know the ports: SD...
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SD Card file to speaker issues
Hello everyone! I'm having some issues playing a WAV file on a speaker. I tried following the instructions on this website but there are some problems. Instructables Audio Player Using Arduino With...
View ArticleTemperature sensor with max31865
hello, I have a max31865 module and a pt100 temperature sensor, and I have successfully used it and it works. Now I plan to replace the PT100 temperature sensor with the sensor I want to make, namely...
View ArticleCombing two pixel effects which runs for 60second and follows the other and...
//this is first code bouncingball #include "FastLED.h" #define NUM_LEDS 32 #define DATA_PIN 6 #define COLOR_ORDER GRB #define CHIPSET NEOPIXEL #define GRAVITY -10 // m/s^2 #define STRIP_LENGTH 1 // m...
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