2 speakers (one as mic other as speaker) - Electronic Circuits Projects Diagrams Free

DirectXXX · 28th July 2003, 04:44 PM

Im a begineer. I have two 8ohm 0.25 speakers. I want to use one as a mic and other as a speaker. I have a transformer which can supply AC voltage of 4, 8 or

12 volts from room powersupply.

So how can i do this SIMPLY???

john1 · 29th July 2003, 02:40 AM

Hi DirectXXX,

It is OK to use a speaker as a mic.
You will need an amplifier.

Connect one of your speakers to the amplifier's
input, and the other to the amplifier's output.

Amplifiers run on DC.

Regards, John

DirectXXX · 29th July 2003, 10:06 AM

i know about amplifier. But i want to do some low level. I heared you can use transistor in this case with a higher voltage supply. But i dont know which transistor. and where should i make connection with three pins of transistor.

Jaw174 · 29th July 2003, 07:28 PM

look up simple audio amplifyers. they can help

pebe · 29th July 2003, 08:59 PM

This link may help. It is very simple. Although designed for an electret mike, an 8ohm speaker would probably be OK.

http://www.reed-electronics.com/ednm...=0&rme=0&cfd=1

DirectXXX · 30th July 2003, 02:21 AM

Simple for you. But i will try it as soon as i get required components.

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28th July 2003, 04:44 PM	(permalink)
DirectXXX	2 speakers (one as mic other as speaker) Im a begineer. I have two 8ohm 0.25 speakers. I want to use one as a mic and other as a speaker. I have a transformer which can supply AC voltage of 4, 8 or 12 volts from room powersupply. So how can i do this SIMPLY???

29th July 2003, 02:40 AM	(permalink)
john1	Hi DirectXXX, It is OK to use a speaker as a mic. You will need an amplifier. Connect one of your speakers to the amplifier's input, and the other to the amplifier's output. Amplifiers run on DC. Regards, John

29th July 2003, 10:06 AM	(permalink)
DirectXXX	i know about amplifier. But i want to do some low level. I heared you can use transistor in this case with a higher voltage supply. But i dont know which transistor. and where should i make connection with three pins of transistor.

29th July 2003, 07:28 PM	(permalink)
Jaw174	look up simple audio amplifyers. they can help __________________ Do no meddel in the affairs of dragons, for you are tasty and go good with ketchup.

29th July 2003, 08:59 PM	(permalink)
pebe	This link may help. It is very simple. Although designed for an electret mike, an 8ohm speaker would probably be OK. http://www.reed-electronics.com/ednm...=0&rme=0&cfd=1

30th July 2003, 02:21 AM	(permalink)
DirectXXX	Simple for you. But i will try it as soon as i get required components.