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Supplying Sufficient Power to Arduino Uno Rev 3

kikovader

Hello, so I am currently doing a mini project which uses a microcontroller (Arduino Uno Rev 3) and a few modules which I will list below. Whenever I try to assemble the modules altogether and power them through the Arduino Uno 5V Power In & Serial Port for Loading Program, the modules seem to be switched off in a way that there is not enough current flowing through all of them. My project will have to move around so I wont be able to use DC Adapter 9-12V. Are there any alternatives for me to power up all the modules + my arduino uno board? Is it possible for me to power up my Arduino Uno with a power bank?

The modules I am using are:


 

1. Bluetooth Module, HC05

Operating Voltage: 4V - 6V (Typically +5V)

Operating Current: 30mA

image

 

 

2. Ultrasonic Sensor, HCSR-04

Operating Voltage: +5V

Operating Current: <15mA

image

 

 

 

3. Speaker (Quantity I will be using: 2)

Impedance: 8 Ohm +/-  15% at 1kHz 1V

Input Power: 0.5W

Handling Capacity: 1W

Buzz, Rattle must be at normal sine wave of 2V.

image

 

 

 

 

 

4. Door Magnetic Switch Reed aka Magnetic Switch Reeds (Quantity I will be using: 3)

Operating Current: 0.5A (Maximum)

Operating Voltage: 100VDC (Maximum)

image

 

 

5. LEDs (6 LEDs are connected in parallel)

Information is based on each Red LED.

Forward Voltage: 5V

image

 

All the modules are connected to a COMMON Ground & VCC.

 

 

Please help me image

How to power up my microcontroller without the use of ADapter as it is not practical enough for my mini project as my product should be able to move around.

 

THank you! image

  • Any USB power adapter or USB battery module should be able to power your system.

    If the reed switches are just inputs to your UNO they would only consume a very minor current, potentially just the internal pull-up current.

  • If you appear to be "amping out", my first thoughts would be:

    • Do you have a current limiting resistor on line with your LED?
    • How are you hooking up the speaker?

     

    For powering with mobility, the answer is to get the largest Amp Hour battery of which size you can tolerate.  Here's a beast similar to one I've used for running things for a few days.  I like it because it doubles as a good battery for camping trips.

     

    Depending on the voltage of the battery you select, you may need to put in a DC-to-DC Buck Converter to get down to the Voltage tolerance of the Arduino.

  • A schematic, or block diagram, of how you connected everything will help diagnose. Highlight which devices are using IO pins and how different devices are being powered.

     

      wrote:

     

    5V Power In & Serial Port for Loading Program,

    Where are you connecting the "5V Power In" on the arduino?

     

      wrote:

     

    5. LEDs (6 LEDs are connected in parallel)

    Information is based on each Red LED.

    Forward Voltage: 5V

    image

     

    Please measure each of the LEDs has its own current limiting resistor...

  • in reply to Sean_Miller

    Good point Sean.

    The LED will not have a forward voltage of 5 V unless there is a built-in resistor (which some LEDs have).

    A resistor is needed in series with the LED as Sean points out.

    They often have a reverse voltage limit of 5 or 6 volts, but that shouldn't come into play here.