[sdiy] driving relays with 4017

[dj hohum]

This should get you started.

http://www.uoguelph.ca/~antoon/gadgets/relays/relays.html

On 6/10/07, bill bigrig <billbigrig at yahoo.com> wrote:
> Howdy,
>
>  I am building a sequencer using a 4017 as the
> counter. output 5v at 10ma. how do I drive a 5v relay
> needing 400ma? I don't know whether to use a single
> transistor or a Darlington pair nor how to hook it up.
> Rig
>
>
>
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