00:00Fix motor drive noise with LTV814 optocouplers
00:04Motor drive whining, false triggering, jitter on your signal line?
00:089 times out of 10 it's ground noise leaking across your isolation boundary.
00:13The LTV814 is the cheap, boring fix AC input optocoupler, PC814 compatible,
00:19dip 4, dropped straight into the footprint you already have.
00:22I dug through listings and pulled the 5 deals actually worth your money.
00:27First up, the volume king, 10 pieces of LTV814 dip 4 for 94 cents.
00:33That's under 10 cents a chip, 4,726 buyers, 4.7 stars.
00:39AC input means it handles either polarity, so you can't wire it backwards and cook it.
00:45If you're breadboarding or repairing a stack of drives, buy this bag and stop thinking about it.
00:50Next, the single unit option, 1 LTV814 a dip 4, transistor output, direct insertion, $2.14.
00:59More per chip, sure, but 4,189 sold at 4.8 stars, and you get the A-grade part in
01:05a proper protective
01:06tube instead of loose in a bag. Good pick when you need one known good part for a bench test,
01:11not a drawer full of spares. Third, 10 pieces for $3.32 with a perfect 5-star rating across 3
01:18,786 orders.
01:21Same part, higher price, and that's fine. You're paying for consistency, matching date codes,
01:27sorted leads, packaging that survives shipping. If you're building more than one board and want
01:32every channel to behave identically, this is the bag I'd grab. Fourth is the same 10-pack at 94 cents,
01:39also a clean 5 stars, 3,741 sold. Identical listing to the first one from a different seller,
01:47and honestly, that's the whole trick here. Two sellers, same part, same price, both rated well.
01:54Order here when the first one's out of stock. Cheap insurance against a single seller going dark.
02:00Note, verify package, dip 4 vs. SOP 8, in listing photos for product 5 before buying.
02:07Skipped, pinout slash CTR test procedure, add when viewers ask.
