[sdiy] driving relays with 4017

[Future Image]

Hi Hohum,
First of all why do you need relays with the 4017? Are you building a kinda 
sequenced switching module (haha I guess a sequential switch :P)? If it's 
only a signal you can use just the bare 4017 fine (you may want to add 
diodes, etc. to protect the chip though).
Thanks,
Finlay Shakespeare


>From: "dj hohum" <djhohum at gmail.com>
>To: "bill bigrig" <billbigrig at yahoo.com>
>CC: synth-diy at dropmix.xs4all.nl
>Subject: Re: [sdiy] driving relays with 4017
>Date: Sun, 10 Jun 2007 18:39:31 -0700
>
>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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