Wifi Transmission; Energy involved in sending a Wifi Signal

akahn430

Oct 29, 2016
4
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

Moderator
Sep 5, 2009
14,304
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

Oct 29, 2016
4
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

Moderator
Sep 5, 2009
14,304
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

Oct 29, 2016
4
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*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
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

Oct 29, 2016
4
Ah, makes much more sense now. I really appreciate the help!

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