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Subject: help needed with intercom circuit

Date: 10/22/00 at 6:52 PM
Posted by: Seamus O'Donnell
E-mail: xairirl@esatclear.ie
Message Posted:

I am working on two different simple circuit designs for a ultralight / microlight intercom system.
The one for now is based on a LM386 and built as the data sheet with a gain of 20. driving one 8R speaker.
I have some electret mic powering circuitry feeding into the 10k pot.

I have a few questions but will start with the easy ones.
1. I would like to drive two 8R speakers can it be done?
2. As this is a two way intercom, I will have two identical circuits, crossing over i.e. the speach from one is heard in the other headset. Can I link the circuits together, so that the person speaking can also hear himself?

Seamus O'Donnell


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