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Old 06-18-13, 03:07 PM   #232
Xringer
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Quote:
Originally Posted by michael.skov View Post
I will interpret your silence so that you do not want to help others
I had problems connecting to the server yesterday..


Anyways, MTM is a one man company and the owner asked me not
give the circuit diagram to anyone. He wants to sell products.
(He gives board owners a schematic diagram for their own use. Not to be shared).
Giving someone a picture of the bottom of the board, amounts to the same thing.


The circuit posted above using an LM339, is almost identical to the MTM board.
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But it has controls that might allow it to be set up, so it doesn't chatter the relays to death, like the MTM design.

Take a look at it.. It looks like a better design to me.
I just don't like using relays for this type of application.
Without a really good controller design, the relays won't last.
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