Arduino Forum

Using Arduino => Motors, Mechanics, Power and CNC => Topic started by: skaught on Sep 19, 2020, 02:06 am

Title: arduino mkr1000 wifi with a Solid State Relay?
Post by: skaught on Sep 19, 2020, 02:06 am
I would like to drive a single channel solid state relay capable of handling 120vac @<1amp as directly as possible from a mkr1000.

Small size matters greatly. Switching speed does not matter at all as the switching frequency will be less than 1 hz.

The relay will trigger as many as 3000 times per day and will need to operate for many years so it must be a SSR.

This application will pull a 120vac (low current) control signal to low for 1 second intervals based on the wifi and programmatic responses.

Can the mkr1000 WIFI drive any SSRs?  Is there a better option that is the same size as the mkr1000? 

There is a 5vcc available however size is very restricted.

Thank you
Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: Paul_KD7HB on Sep 19, 2020, 02:36 am
Can the mkr1000 WIFI drive any SSRs?


Can your mkr1000 light a LED? That is all it takes for a SSR.

Paul
Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: skaught on Sep 19, 2020, 03:33 am
That depends on the LED does it not?

And I do not have one yet, I will not buy my prototype Arduino until I can figure out which components are the best suited.

And which SSR?  I need one that is very small and can work with the mkr1000 (or similar).
Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: Wawa on Sep 19, 2020, 04:15 am
Even a small Omron G3MB-202P SSR needs the same or a bit more current than a 3.3volt pin can provide.
Common SSR boards (https://www.aliexpress.com/item/4001208508041.html) solve that with a transistor between pin and SSR LED (https://ardubotics.eu/4034-thickbox/sainsmart-4-channel-5v-solid-state-relay-module-boardomron-ssr-avr-dsp-arduino.jpg).
Leo..
Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: skaught on Sep 19, 2020, 06:15 am
I am having trouble finding any commonly.
Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: ballscrewbob on Sep 19, 2020, 02:24 pm
Random thought but would a level shifter (https://www.google.com/search?q=level+shifter&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi547XEm_XrAhXiQ98KHX5cDUQQ_AUoAXoECBUQAw&biw=1768&bih=887) be suitable for running an SSR ?
They can be had in very small module sizes maybe enough to glue to the side of an SSR.

Many of the Chinese modules also claim to run from 3 volts too.



Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: CrossRoads on Sep 19, 2020, 11:50 pm
How about this SSR instead, if you can live with just 825mA of switching current:

https://www.infineon.com/dgdl/pvt212.pdf?fileId=5546d462533600a4015356841646295d (https://www.infineon.com/dgdl/pvt212.pdf?fileId=5546d462533600a4015356841646295d)
Can the MKR1000 drive 5mA?
Datasheet for the chip would suggest that at least some of the IOs can sink up to 10mA.



(https://forum.arduino.cc/index.php?action=dlattach;topic=705650.0;attach=382409)
Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: skaught on Sep 20, 2020, 04:28 am
@CrossRoads This looks perfect!!  THANK YOU!

Title: Re: arduino mkr1000 wifi with a Solid State Relay?
Post by: skaught on Sep 20, 2020, 04:38 am
@ballscrewbob

That is also a great idea, I'll try that too!

Thanks!