https://www.ebay.com/itm/323367514300
Looking to convert 24vac to 5vdc to run an arduino thermostat.
I could also go from 24vac to 24vdc as I purchased a 24vdc to 5vdc converter board in error.
I also purchased a 24vdc relay that I could use if I went this way instead.
This converter looks like the ticket as it goes from 24vac which seems to be rare. It's also really small in dimensions. I was just hoping to get one before February.
My order delivery date is Jan 2, 2020. (I ordered 2, because the price was too low to pass up)
I'm in California (USA) .
Where are you ?
If you're in a hurry, you can add the AC rectification to your existing DC-DC module with a bridge rectifier and capacitor.
I was wondering if that might work, but I'm not 100% sure on how to do this.
Raschemmel, I'm in Nebraska.
but I'm not 100% sure on how to do this.
It's only 4 diodes but these days nobody uses discrete diodes (unless they're in Nebraska, ha ha).
Most people just buy a full wave bridge and add a large electrolytic filter cap.
I've heard about you California people.
Maybe I'll just wait until January and get that other one.
I've heard about you California people.
Back in the day there was a license plate holder that said:
"WELCOME TO CALIFORNIA ! (now go home)"
The rectifier solution is really trivial. Solder a 50v capacitor across the + and - terminals of the rectifier, observing polarity. Connect the + and - terminals of the bridge to the input of the buck module. You’re done.
The capacitor just needs to be big enough to keep the voltage at the input of the buck regulator above its dropout voltage for the current you’re demanding.
Thanks. I went ahead and ordered one of the Chinese converters. I had to get some different relays anyway.
Usually get at least 5 from Aliexpress as it is often cheaper than Ebay and in many cases quicker too.
Usually find the one that I want then use that as a search term on Ali but add "LOT" as the last search term.
Then sort by price and wheedle out the ones that match the QTY. I want.
Prices tend to drop a little more then.
Bob.
Never used AliExpress. I'll remember that next time.
Almost all my purchases have moved from Ebay to Aliexpress.
Had fewer (well none) go missing.
Often you can choose a different shipping method.
usually more items are "tracked"
Prices are often a fraction of Ebay and make Amazon prices seem exorbitant (Amazon does have its place for some "fast" deliveries)
Refunds and disputes seem quicker and used twice with results in a couple of days or so, not the long drawn out Ebay / Amazon approach.
Was an avid Ebayer and so was the wife.
Now not so much.
EDIT...
In addition to the above and often completely missing from both Ebay and Amazon there is quite often the full specifications etc for the items you may want to buy.
That makes things a lot easier than guessing as you would on the other two sites where sales are often more important than details.