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486 questions
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-3 votes
2 answers
66 views

The x and y axis pins on the KY-023 are labeled VRx and VRy, but I'm curious as to what they stand for, as I couldn't find any official statements about it. I assumed it was "Variable Resistor X/...
Flamethrower's user avatar
  • 105
0 votes
0 answers
35 views

I am trying to wire up the ESP 32 based Crunch-E keychain synth (gituhub repo with wiring diagram here). In my case I am using a 30 pin ESP Wroom 32 board with pinout diagram here. The Crunch-E wiring ...
ben's user avatar
  • 101
0 votes
0 answers
127 views

I'm working on an ESP8266-based water level monitoring system using an ultrasonic sensor and an I2C LCD. The problem I'm facing is that sometimes the ESP8266 does not boot properly when powered on for ...
johnson veigas's user avatar
  • 13
0 votes
1 answer
215 views

I'm using an STM32F407ZET6 with the Arduino core support in PlatformIO. CPU has an external 8MHz crystal running at 168MHz. I have a project where I'm already using UART1, I2C1, SPI2 and SDIO (1Hz ...
Joe's user avatar
  • 61
0 votes
2 answers
87 views

I am having a circuit that I am using the RX pin to receive data (int) from other uC (ESP12E) as one way communication, and for the lack of pins I had to use the TX pin as GPIO for a digit of a seven ...
Maher's user avatar
  • 11
-1 votes
2 answers
517 views

Looks like I didn't make myself clear, sorry. Update to clarify things / TL;DR version: 4 Arduino UNO pins are connected to respective DE-9 pins, responsible for UP, DOWN, LEFT, RIGHT directions ...
tOad's user avatar
  • 3
-2 votes
1 answer
183 views

After researching a solution to a problem I want to solve, I'm hoping the third time posting is a charm. :) I'd like to use an Arduino to control a vintage floppy disk drive. I'm looking to use it as ...
Tuc's user avatar
  • 1
0 votes
2 answers
422 views

There is probably another way to achieve what I want without connecting pins to each other, so I will explain the scenario: I am trying to build an Arduino based Enigma Machine. The cryptography is ...
Diego Dyan's user avatar
  • 23
1 vote
3 answers
946 views

I am a little bewildered about the analog pins on the Arduino ATTiny88. First of all, am I correct in thinking the functions analogRead() and analogWrite() can use either the string A0 - A7 or a ...
LesRhorer's user avatar
  • 113
-2 votes
2 answers
88 views

I would like to know about physically passing through a pin in order to get to another. For instance, if I have a sensor on one side of an ATMEGA328P or ESP8266 (Wemos D1 Mini) yet need to connect to ...
jhorv's user avatar
  • 41
3 votes
2 answers
521 views

I have an Adafruit Feather RP2040 (pinouts) connected via pin 6 to a relay. The code (below) triggers the relay when a separate color sensor returns "enough" red values. The color sensor ...
Jeff Schaller's user avatar
  • 169
0 votes
2 answers
170 views

I have an Arduino project to control a motor's speed at 3 levels, indicated by 3 LEDs, so level 1 is speed 1 and LED 1, and so on for levels 2/3. Also, I added a low-battery voltage indicator to ...
Tito's user avatar
  • 111
1 vote
1 answer
92 views

I use GPIO 5 to trigger a relay. My code also connects with a secure MQTT connection for which I have to use the BearSSL certificate definitions. Without the BearSSL certificates, when the ESP ...
Shreyansh Jain's user avatar
  • 21
4 votes
2 answers
1k views

I'm trying to use an existing Arduino library on the Raspberry Pi Pico. The library is here: https://github.com/j-bellavance/EdgeDebounce/tree/master It's based on some interesting insight at Jack ...
Jeff Haas's user avatar
  • 43
1 vote
0 answers
94 views

I've bought this 4 relay ESP8266 board to active lights and window shades. In an odd way - its relays are not pre-connected to a certain IO's but let you choose which IOs will operate relays (by ...
guyd's user avatar
  • 1,049

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