running multiple relay''s from BS-1
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Posts: 46,084
Thank you,
I do have enough output pins and this looks like the method to use
since on this project I will also need to switch different
voltages. I like Sid's advice and can think of even more projets
now that I can get more outputs from teh BS-1 cool....
I do have another qurestion for you, you mention in you additional
note that I should put a diode across the relay? do you mean from
the + to the - side of the relay? can you please explain to me why
this is needed (I don't want to screw anything up and would like to
understand the purpose of all component, for future refference)
thank you all again
Brent
HAKSAW_CA
--- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> If you have 4 available output pins go to the files section of
www.yahoogroups.com, Basic Stamps group, and look for the file named
IRL520.jpg
>
> This is only one of many methods that will work. Sid mentioned
using a '595 shift register and a Darlington array, and that
solution also works and if memory serves me correctly, it the '595
will consume 3 stamp pins.
>
> The IRL520 method is a simple way to drive your relay coils. A
logic high from the stamp will engergize the relay coil......so
unless you are tight on available output pins, the IRL520 mosfets
will do the job.
>
> A good source and inexpensive shipping for the IRL's is
www.glitchbuster.com (and I am not affiliated with them in any way,
just a happy customer).
>
> Additional note. Be sure to place a diode across the relay coil,
cathode (end with a stripe) to the positive side of the relay coil
I do have enough output pins and this looks like the method to use
since on this project I will also need to switch different
voltages. I like Sid's advice and can think of even more projets
now that I can get more outputs from teh BS-1 cool....
I do have another qurestion for you, you mention in you additional
note that I should put a diode across the relay? do you mean from
the + to the - side of the relay? can you please explain to me why
this is needed (I don't want to screw anything up and would like to
understand the purpose of all component, for future refference)
thank you all again
Brent
HAKSAW_CA
--- In basicstamps@yahoogroups.com, smartdim@a... wrote:
> If you have 4 available output pins go to the files section of
www.yahoogroups.com, Basic Stamps group, and look for the file named
IRL520.jpg
>
> This is only one of many methods that will work. Sid mentioned
using a '595 shift register and a Darlington array, and that
solution also works and if memory serves me correctly, it the '595
will consume 3 stamp pins.
>
> The IRL520 method is a simple way to drive your relay coils. A
logic high from the stamp will engergize the relay coil......so
unless you are tight on available output pins, the IRL520 mosfets
will do the job.
>
> A good source and inexpensive shipping for the IRL's is
www.glitchbuster.com (and I am not affiliated with them in any way,
just a happy customer).
>
> Additional note. Be sure to place a diode across the relay coil,
cathode (end with a stripe) to the positive side of the relay coil