I have modified a circuit that I posted previously. I am trying to use a 5vdc output from a controller (which is protected) to reverse polarity on a 110vdc load using a DPDT relay as an H-Bridge. Can you guys review it and tell me if it is okay?

Specifically here are my questions:

1. My last thread was closed to a violation of TOS based on how the LED was connected. Does this new design correct that problem?

2. Do I need a diode across the coil?

3. How can I protect the relay? (my first one got ruined somehow but am not sure how, I want to make sure it doesnt happen again)

The relay used is this one: http://www.digikey.com/product-sear...us&keywords=PB1059-ND&x=13&y=19&formaction=on

The load that the christmas light strand pulls is 110mA @ 110 vdc

Thanks.

 

No, You have made exactly the same mistake, and this is one of the reasons plugging LEDs into a wall outlet is not allowed on this site. You don't even recognize what the mistake is, so you shouldn't be trying to work with this.

 

I am closing this thread. If you try to post it again you will be banned.