Photoswitch compatibility question

I found a bunch of photo switches I'd saved for one reason or another, wondering if they'll work for the standard gen7 opto design without changing anything.

The model number is OPB992L55, datasheet here: DATASHEET

Well, try it. An endstop can be easily assembled on a breadboard.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

Alright then, I'll just make it on a breadboard, following the optoendstop gen 7 PDF, replacing my photoswitch with the H21LOB. To test it, should I hook it up to a working gen7 board, or is there another way?

H21LOB? Gen7 used the H21LOB up to two weeks ago, so simply roll back a few versions and there you are. The "gen2-3compatible" one still uses the H21LOB and just differs in pin layout of the connector.

For testing an endstop, a voltage meter is sufficient. You want close to 0 volts in the untriggered case and close to 5 volts in the triggered case. Maximum for Low is 1.5 V, minimum for High is 3 V on ATmegas supplied with 5 V.

Firmware can compensate for an inversion, 5V/0V instead of 0V/5V.

You likely also want to get the LED right, it should light up only with the endstop triggered.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY