Unanswered Questions
113 questions with no upvoted or accepted answers
4
votes
0
answers
76
views
Can I use regular pins (Example: D2, A3, etc...) as serial (RX, TX)?
Python/Arduino Beginner here...
I have a DFplayer I am trying to hook to my Arduino and I want to hook it up through the regular pins instead of the RX and TX pins, but I've not been able to find ...
- 41
4
votes
2
answers
732
views
Bluetooth communication not working with DC power but works with USB power?
I am running an HM-10 Bluetooth Low Energy (BLE) module to transmit serial data (using SoftwareSerial) from an analog sensor onboard my Arduino Uno to a serial terminal app on my Android phone. When I ...
CommunityBot
- 1
3
votes
0
answers
608
views
PCA9685 - Hardware problem with diode?
I'm working on a project, where I need to run several high-torque servos. For that I bought come of these PCA9685 boards.
I hooked everything up with my arduino and connected an external 5V - max 3A ...
3
votes
0
answers
1k
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TRIAC Pulse driver for Spot Welder (help needed with programming)
I have designed and built a transformer driver board for my spot welder. It is powered from mains electricity (230 V) and consists of the following segments: triac drive and protection, zero cross ...
- 31
3
votes
0
answers
93
views
Correctly Powering Lilypad Arduino
I am trying to correctly power a Lilypad Arduino that is attached with an HC-05, Lilypad temp sensor, and Amped pulse sensor. So far I have found that powering by plugging the Lilypad into my laptop ...
- 31
3
votes
0
answers
214
views
Atmel SAM MCU (on Arduino Due) only boots after second power up
I am using an Arduino Due as a prototyping board for a microcontroller project. The due has the chip Atmel ATSAM3X8E, with an ARM Cortex-M3 core. I am programming the flash directly using Atmel Studio ...
GrixM
2
votes
1
answer
71
views
Confusing language on arduino docs about powering via 3V3/5V pins
I'm reading about powering alternatives for the arduino board, and I have run across two confusing sentences in Section 5, powering via 3V3/5V pin. First, it says:
3V3 and 5V pins can also be used as ...
CommunityBot
- 1
2
votes
0
answers
118
views
WiFiNINA Reseting Arduino Nano IoT 33 When Powered Externally
This is puzzling me: if I power my Arduino IoT 33 Board from USB, everything runs smoothly. Now, if I power it with 5V on Vin, the board resets as soon as I call WiFiNINA's WiFi.begin(ssid, pass).
Of ...
- 121
2
votes
0
answers
144
views
ESP8266-01S only coming back from DeepSleep every 2nd time
I'm using an ESP8266-01S for a battery-powered project. The ESP is in DeepSleep, a doorbell relay pulls RST to GND, bringing the ESP to life to do some stuff, before going back to DeepSleep.
My ...
- 151
2
votes
0
answers
138
views
Power requirements of a 7 Segment Display on Uno vs Nano
As part of a Simhub Dash set up I have been trying to get a 8 Digit 7 segment display working on an Arduino Nano. As part of my fault finding process I have gone back to basics and am using the ...
- 121
2
votes
0
answers
61
views
Arduino compatible ESP32 and ESP8266 board power consumption at sleep state
I have data on smaller modules with ESP32 and ESP8266, but can't find anything reliable pertaining to the whole board power consumption (current) with 12V input and microcontroller at low power or ...
- 209
2
votes
0
answers
310
views
Low Power, SD Card module and SCK
in order to minimise power consumption in a project using the Arduino Nano, I need to set pin D13 to HIGH after using it as SCK for transferring data to an SD card module (I use the SD.h module. I ...
- 49
2
votes
0
answers
833
views
Help needed with driving multiple stepper motors on arduino UNO
I am brand new to Arduino but have good experience with Raspberry Pi's and Microchips.
My problem is that I am having trouble driving many stepper motors at once. I am using the AccelStepper library(...
- 163
2
votes
0
answers
51
views
Low power USB C power supply
I am searching for a tiny board to that accepts an usb-c cable and outputs 5v.
To my understanding, for the few hundred milliamps two 5k1 resistors on the board would suffice. PD is not needed.
I ...
- 41
2
votes
0
answers
133
views
Turning on controller with button and turning off with a timeout
I am making a device controlled by an ESP 8266 and am wanting to save power by having it power down when not in use. The desired behavior is for a momentary button press or vibration sensor activation ...
- 31