12V relay power ODS #183
I was under the impression that the #183 ODS board configuration was kinda plug and play only to find out if you don't have a specific tap on your power transformer you have to use different 5V relays and not BOM specified 12V.
or add an additional 12v power source? Sorry for the rant,but did notice people with a small transformer in their build images,now I know why....no mention of it on the layout. I am really green at this so maybe it's just me and I can't see it on the schematic? I'll keep searching for answers....
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What taps or transformers do you have available to you? The AA 183 schematic uses a voltage-doubler cell to convert a 6 VAC secondary winding into the raw DC voltage required for a 12 VDC regulator and 12V relays. There are other ways to power the relays, some more involved than others, but as you correctly point out, the decision is driven by what AC source you have available to you.