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Re: [AVR-Chat] Need Help with a circuit

2004-08-12 by Dave VanHorn

At 10:38 PM 8/11/2004, Jeffrey Engel wrote:

>Dave,
>
>I'm sure you're right.
>Didn't mean to spread any mis-information.

Generally, you're right, but it pays to remember there are exceptions. :)
Most relays are >10mA to pull in, and have coil voltages that would preclude the AVR's output transistors from allowing enough current.

Plus, it's just a really bad idea to save $0.05 and drive the relay directly.

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