@zander My Uncle had a furniture store with an old 2 storey elevator in the warehouse in Patterson, NJ. A lever for up-down. Had to get the level rig...

The new elevators you do not press up/down but your desired floor. You are then instructed to the designated lift.In my building when both elevators ...

@zander I will post about this phone eventually.It is remarkable, but I have yet to test most of its features.It claims military grade toughness, but ...

I think that a microcomputer or even a microprocessor is overkill for the job. No matter that, the key component would be the LDD or photoDiode to tr...

@inst-tech Back in the day when you could dial zero for an operator and ask her what time it was, one operator had a call sometime before Noon every d...

@zander So how without solid state curcuitry did an elevator respond to all the down button calls by going up to the highest floor first?I have worked...

@inq Yes this is purely academic, and I think a very good logic problem- and perhaps a historical expose of how technologies of earlier periods solve...

@zander Well it's certain that an LED doesn't care if it's limited by a 150 ohm resistor or a 330 ohm. The difference in brightness- might be insigni...

Wow! thanks for turning me on to Pluto!I love it!!!for anyone who wants to know...My phone may have many of those features; my Canon - not so much.My ...

Yes, it was intended for holding notes but not exclusively. When I saw it I knew exactly what it was meant for.

@dronebot-workshopA fireman friend suggested sand, which I have a whole beachful of the stuff just 13 stories below me and 2 blocks away - plus a whol...