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mhennessy · 21st Jan 2020, 11:53 pm

The ones I've seen didn't contain TTL ICs - the electronics was integrated into the IR sensor (e.g. Spectrol 120EN) or Hall sensor (e.g. Alps EM11).

I would be amazed if any such encoder would be damaged by a PP3 via weak (10-100k) pullups. And I'm pretty sure that a TTL or CMOS (e.g. HC) logic IC would be just fine.

Of course, a constructive suggestion might have been the part number of a micropower 5V regulator to get around the ~5mA consumption of the 7805. How about the LP2950, for example? But frankly, I'd stick to my earlier suggestion - it was obvious to me at least that this was for mechanical contacting types only. If the OP had provided a 5V output terminal to power an "active" encoder, then that would have been different.

21st Jan 2020, 11:53 pm	#7
mhennessy Dekatron Join Date: Jul 2007 Location: Evesham, Worcestershire, UK. Posts: 4,244	Re: Simple Rotary encoder tester. The ones I've seen didn't contain TTL ICs - the electronics was integrated into the IR sensor (e.g. Spectrol 120EN) or Hall sensor (e.g. Alps EM11). I would be amazed if any such encoder would be damaged by a PP3 via weak (10-100k) pullups. And I'm pretty sure that a TTL or CMOS (e.g. HC) logic IC would be just fine. Of course, a constructive suggestion might have been the part number of a micropower 5V regulator to get around the ~5mA consumption of the 7805. How about the LP2950, for example? But frankly, I'd stick to my earlier suggestion - it was obvious to me at least that this was for mechanical contacting types only. If the OP had provided a 5V output terminal to power an "active" encoder, then that would have been different.