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Your cart is empty.4 pins, dual row, 2.54mm pitch. Used widely in computer terminals, system appliances, measuring instruments, registers, copiers, automatic vending machines, electric home appliance, switching power supply, etc.
Oak Lea
2025-07-18 15:32:25
These work very good and the price is great. I ordered a few about a year ago and used them up in arduino projects. I ordered these to replace them. It took a while for delivery since they came from China, but the wait was well worth it to get this price.I use them on arduinos to trigger other circuits and avoid an electrical connection between them.I've used 20 or so of these and I have yet to have one fail.
Xaetognath
2025-05-03 12:53:36
These are cheap little optical couplers. They let you connect signals from two parts of a circuit talk to each other, without actually electrically connecting them together. You may, for instance, want to turn on 12V to close a relay, but are working with 5v TTL. This could be a bad thing, but you have OPTOCOUPLERS! You could want to connect a neat toy you just made to your very expensive Pentax SLR, and you don't want your expensive toy destroyed by your cheap circuit, and that could be hard, but you have OPTOCOUPLERS! These make you super safe connecting circuits together.Yes, they work. No, you don't want to pump more than about 5 volts on the input side, or you'll blow them out (remember, there's a teeny little LED buried inside this guy). They only switch 60V or so (according to the data sheet) and only DC (hey, it's a diode, and you emphatically DON'T want to run more than 6v backwards through it), but if you are switching DC up to there, you're golden.They're tiny, kinda cute, look like little bugs in their own weird sort of way, and if you're not using them for their intended purpose, you can always make tiny little critters out of them for a doll house or Polly Pockets set. They don't have enough legs to be insects, crabs, or spiders, but with some creative squinting, you could probably manage any of those.The price gets you 10 of them, so you can afford to wreck a few with experimentation, but they seem pretty solid. I haven't checked the timing yet on an O-scope, but the data sheet claims a rise-time for switching at about 3-4uSec, fall time of 18uSec. Since I want a high rise-time, I'm good with that. For my project, I just care about how fast it comes on, and can let 18uSec go by for fall time without quibbling.For my application, they turned on at 5vTTL with no issue, and passed the low currents I was isolating without complaint. I'll probably be using these in the future for optical isolation in other places as well.
jtx
2025-05-02 14:22:12
I tried them out in test circuits. They all worked. Using a magnifying glass I found they are pc817 as advertised. The anode is marked with a little dot and the emitter is on the opposite side according to the spec sheets I found doing an internet search. I am using them to isolate signals on my beaglebone black and to a lesser extent my arduinos.
Jerry Rutherford
2025-04-22 17:38:37
Perfect replacement parts... much cheaper than elsewhere.
JD
2025-04-08 15:15:13
I am using a 12V on/off input (from a projector) to drive a 3.3V input (on a Raspberry Pi). I used a 510ohm resistor in series with the input, and a 10Kohm bleeder resistor in parallel with the input. The output connects the RPi pin straight to ground (the pin has an internal pull-up resistor). Works perfectly.
Richard A.
2025-02-24 13:32:35
I normally don't leave review. But it is not as described in the picture.These don't have the long legs to fit in breadboards etc... You have tosolder. So if you are planning to design, its a pain cuz they are so tinyand can't go in the breadboard.
Customer
2025-01-27 15:14:58
What is the current rating?
Seven
2025-01-16 18:39:22
HiIf you need an opto coupler with a compact size 4 pin this will work nice. This item does sink much current with the output transistor. Led voltage I ran at 1.4v so calculate your drop resistor. Source voltage - 1.4 divided by 10 ma 10-3 will give you the resistor value
Eric N
2024-12-31 18:13:35
Not much to say about them,,, they work? Did what I needed them to do. Great for isolating logic circuits from high load circuits.
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