SORTING TIMEOK so some more stuff to sort... this time OPTO stuff.... I like opto stuff, it's just cool.
On the left are infra red LEDs and receivers from consumer electronics.
The group of 9 packages circled in red below, not sure what they are, zero markings on any of them.
I think they are receivers, so phot diode or photo transistor, I guess.
I buzzed them, DMM says they behave like diodes, with a drop of about 0.485V.
On the right, opto-couplers. All the yellow ones are yellow because they have some kinda of crusty conformal coating on them and it's hard to read part numbers... might need to do some fine grit wet sanding or scraping with a sharp blade...
All these I salvaged a few years ago from the same board. Were all soldered on both sides of the PCB, the only way I found to removed them without destroying them, was to heat them from the bottom with my hot air station, then just pull the chips effortlessly with tweezers. cheap hot air station I bought for 50 Euros back then. With that one job alone I was sold on the concept and it paid for itself. I now love hot air stations....
The column of small 4 pin black ones I think I must have mostly salvaged from SMPS in consumer stuff. So they are all different, one here one there...
I doubt all that remote control Rx / Tx can be identified, nor would I care too much about it... it's not like I would be reusing it
I would just use it for experiments for fun, at best.
However of course all the opto-couplers I will Google and inventory
In the lot you can see a lone IR barrier sensor. This one might be worth identifying, there must be part number on it, and could be reused in some project, who knows.