Questions tagged [arduino-uno]
The arduino-uno tag has no summary.
266 questions
1 vote
1 answer
165 views
Drop of voltage VCC on Arduino UNO
Summary: I am using an Arduino UNO. I am using a potentiometer connected from 5V Arduino supply to ground to provide a variable voltage on the pot wiper, which I input to an analog input on the UNO ...
- 69
0 votes
0 answers
65 views
Two NEMA 17 stepper motors only move intermittently when controlled via Bluetooth (HM-10 + Arduino Uno)
I'm doing a senior design project for my Computer Engineering bachelor's degree and I'm running into issues getting consistant movement with my two NEMA 17 Stepper motors. I'm in the process of making ...
3 votes
2 answers
179 views
IRFZ44N , PWM signal from Atmega328P always conducting
I'm currently using a MOSFET IRFZ44N to feed a motor using a PWM signal that comes from my Arduino Uno board. These are the connections that i have made: Being the 50 ohms resistance the equivalent of ...
- 69
0 votes
1 answer
103 views
3.3V circuit operation of Arduino UNO
This is the electrical schematic of the circuit that provides 3.3V on the Arduino UNO board: My question is: What is the purpose of the circuit? Here is what I understand: RN1A and RN1B divide Vin by ...
- 39
-1 votes
1 answer
128 views
PIR Sensor Not working
I have a active buzzer and a PIR motion sensor and an Arduino board. While I try to achieve, when there is motion then a buzzer to make the beep sound and between each motion to be a delay. But the ...
-1 votes
1 answer
157 views
What is the best micro electronic to use to specifically measure the surface temperature of a carrot [closed]
I'm currently working on a Arduino controller that sends data to an API. One of the values I need is the surface temperature of a carrot, preferably a large distance away, approx. 2..3 metres. EDIT: ...
- 11
1 vote
0 answers
67 views
Can I Power a 1.5m Addressable LED Strip via USB type A 3.0? Overheating Issues [closed]
I have a 1.5-meter addressable LED strip with a 5V 3A rating. I tried using a 5V 4A power supply, but the LED strip overheated. Then, I tested with a phone charger (output: 5V/9V/12V - 1.67A/1.67A/1....
1 vote
1 answer
73 views
Considerations for long wiring runs on Hall-effect angle sensor inputs
I am looking to custom-build a set of flight controls for Microsoft Flight Simulator, connecting via USB to a PC. I intend to base the design on Hall-effect angle-to-voltage sensors (potentiometer ...
- 603
1 vote
1 answer
99 views
9V battery draining very quickly because of servo motors or 11.1V Lipo battery in Arduino project
I want to control three servo motors and two BLDC motors using an Arduino and an HC-05 Bluetooth module. Using a 9V battery to power the Arduino. Connected Arduino's 5v output to Vcc of the HC-05 ...
- 11
1 vote
2 answers
177 views
Arduino UNO R3's power supply
I recently acquired an Arduino Uno R3 board. 4 ways to power it are as follows (link): USB port DC jack port VIN/GND combo 3.3V/5V/GND combo However, lots of schematic online leave out this ...
- 95
0 votes
1 answer
85 views
I want to build a circuit to detect a shock from a statically charged person using an Arduino [closed]
As the title says, I want to make a circuit that allows me to detect the resultant shock from when someone who is charged with static electricity touches some piece of metal. My idea is that the ...
- 11
1 vote
0 answers
90 views
Assistance in troubleshooting control of a small DC motor with a ULN2003A
I'm using an Arduino Uno's MCU to send a logic signal to a ULN2003A, which will power a small DC motor/pump. Here is a system sketch that modifies one found in the ULN2003A data sheet. The system &...
- 21
-1 votes
2 answers
79 views
Why does my counter keep decrementing even after I don't press the switch then increments afterwards? How do I fix it? [closed]
I am using arduino to make a counter that increments if I don't press a switch connected to my arduino then decrements as long as I am pressing the switch. The counter is a 7 segment anode display. In ...
- 103
2 votes
2 answers
239 views
RF Receiver Shuffles Data
I’m experiencing an unexpected issue with my receiver. I’m using the DL-RXC2016BH receiver module along with an RF transmitter (I also tested the setup with different receivers, but the results ...
- 31
2 votes
2 answers
684 views
Can ATmega328P microcontroller work at 3.3 V with 8 MHz oscillator
I want to use ATmega328P for my project, but I saw in datasheet that to use 16 MHz oscillators. Is it possible to use 8 MHz oscillators? Could you please direct my attention to other things that I ...
