Questions tagged [arduino-uno]
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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 ...
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1
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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 ...
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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:
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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....
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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 ...
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1
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88
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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
...
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2
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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 ...
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1
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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 ...
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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 &...
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2
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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 ...
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2
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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 ...
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2
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665
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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 ...
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1
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Using H-Bridge as a way to drive a latching solenoid that requires reverse polarity pulses
simulate this circuit – Schematic created using CircuitLab
I have been working on an Arduino project which requires me to control a latching solenoid through pins on the Arduino uno. The ...
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Differences in UV Sensor Readings Between Arduino Uno and ATTiny85 Using AnalogReference
I've been working on a project involving UV sensor readings using both an Arduino Uno and an ATTiny85. However, I've encountered discrepancies in the UV index values obtained from the two different ...
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PHD ULTRA syringe pump communicate with Arduino
I have a PHD ULTRA syringe pump from Harvard Apparatus. I want to establish communication between an Arduino and the syringe pump. The company provided me with a Python code, but Arduino does not ...