Wifi Transmission; Energy involved in sending a Wifi Signal

[akahn430]

I'm currently working on a project involving Wifi transmission. The device needs to send a 1-3 digit number to a computer/phone that is 5-15 feet away. Approximately how much energy will this take to send one number?

Thank you!

Austin

 

[davenn]

I'm currently working on a project involving Wifi transmission. The device needs to send a 1-3 digit number to a computer/phone that is 5-15 feet away. Approximately how much energy will this take to send one number?

Thank you!

Austin

hi Austin
welcome to EP

a very odd question
A wifi connection is maintained, once a connection is established with or without data being transmitted
There is continuous background link etc checking going on

do you really need wifi ? Bluetooth would probably be easier

so would you like to tell us what you really mean

Wifi and BT are low transmitter power devices, they will have a minimum power out of maybe around 10 - 20 mW


Dave

 

[akahn430]

Hi Dave. Thanks for the response.

Depending on the range that is needed, I suppose it could use Bluetooth.

What I am trying to get at is: I need to make a system that calculates force in an object when struck (Accelerometer), then sends that force back to a Computer/phone... and it has to power itself, so first, I need to figure out how much energy needs to be generated for each time the Force (1-3 digit number) is sent to the computer, for the system to function.

 

[davenn]

Hi Dave. Thanks for the response.

Depending on the range that is needed, I suppose it could use Bluetooth.

What I am trying to get at is: I need to make a system that calculates force in an object when struck (Accelerometer), then sends that force back to a Computer/phone... and it has to power itself, so first, I need to figure out how much energy needs to be generated for each time the Force (1-3 digit number) is sent to the computer, for the system to function.

BT is good for up to 10m

Power needed in the way u are asking is irrelevent as i said earlier there is going to be continuous power usage. Not just when u send data

 

[akahn430]

Thanks again for the response.

So there would need to be a constant voltage? How would I go about figuring out how much energy has to be generated to power the constant voltage?

 

[(*steve*)]

So there would need to be a constant voltage? How would I go about figuring out how much energy has to be generated to power the constant voltage?

You multiply:

1. the voltage (required by the transmitter and produced by the power source)
   
2. by the current (drawn by the transmitter)
   
3. by the time (that you want the transmitter operating -- could be minutes, hours, or days)

That gives you an amount of energy required.

From that you can choose an appropriate battery.

 

[akahn430]

Ah, makes much more sense now. I really appreciate the help!