Inside an Otis elevator button (Patreon)

Published:

2024-04-04 03:57:46

Imported:

2024-04

Content

A visually nice elevator button with red LED halo. It operates at 24V and has other applications. Clones can be found on AliExpress with the keyword in the description of the video. Note that with this button the switch contact is also referenced to +24V so logic level circuitry will need a suitable interface like a resistive divider.

https://youtu.be/aIc0dUio8aU

Files

Inside an Otis elevator button (with schematic)

It's always interesting to take a look at elevator components. Especially Otis components because of their iconic history. This is a fairly standard illuminated halo button that may be used by other elevator manufacturers too. A search on AliExpress for the keyword br27c will find similar buttons, but they may have different connections than this one. Usually 24V because that's a standard control voltage in industrial applications. I've just ordered a couple to look at. The electrical configuration of this button is odd, because it has a four pin connector, but only three pins are used. A different style of button has the LEDs and switch on four separate connections. It does make sense to use 3 wires though, as the switch signal is also 24V in some applications. If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- https://www.bigclive.com/coffee.htm This also keeps the channel independent of YouTube's algorithm quirks, allowing it to be a bit more dangerous and naughty. #ElectronicsCreators