# Getting Signal Voltage From Source Power

Discussion in 'General Electronics Discussion' started by tedstruk, Aug 22, 2017.

1. ### tedstruk

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I used to know how to make this conversion from source power ie. 12v to signal voltage, but I have forgotten what signal is. its like 1 ohm at 1v or something like that...
can anyone help me?(ha ha ha)

tedstruk, Aug 22, 2017

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Do you mean the power equation P = I*V ?

Arouse1973, Aug 22, 2017

3. ### tedstruk

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that might be it.... but thats watts. and I think signal is like 1millivolts@1 watt?
or 1 millivolt @ 1kohms? anyway I remember it was millivolts, but I can't remember the other part.
signal is generally used as power for circuits like radio sets, comparators and is used as a base for all other math in the circuit...

blank slates are the cause of every great problem....
Just look at Einstien.

tedstruk, Aug 23, 2017
4. ### kellys_eye

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0dBm - 1 milliwatt

kellys_eye, Aug 23, 2017
5. ### davennModerator

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have absolutely no idea what you mean ????

davenn, Aug 24, 2017
6. ### kellys_eye

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1A = 1V dropped across 1Ω ???

kellys_eye, Aug 24, 2017
7. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

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Not until you ask a question we can understand.

(*steve*), Aug 24, 2017
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8. ### tedstruk

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0 dBm I think thats it.
1 milliwatt..
that is the point at which wattage is not capable of creating exponential heat....
I think... Its been along long time since I did any electronics!

Last edited by a moderator: Aug 25, 2017
tedstruk, Aug 25, 2017
9. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

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No it's just a reference point.

The expenditure of power, no matter how small, can cause heating.

(*steve*), Aug 25, 2017
10. ### kellys_eye

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... don't you mean 'ever'??

kellys_eye, Aug 25, 2017
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11. ### BobK

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What do you mean? He did electronics and he has the smoke to prove it!

Bob

BobK, Aug 26, 2017
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