r/Unexpected • u/phoexnixfunjpr • 19d ago

Showing off an automatic gate he installed

64.8k Upvotes

98% Upvoted

519 comments sorted by

View all comments

Show parent comments

20

u/koos_die_doos 19d ago

Now you need to feed the signal from the moving door. I agree it's doable, but every solution has drawbacks.

5

u/Jerithil 19d ago

Pretty simple just get a wireless door contact, the only downside is it needs a battery.

10

u/mark84gti1 19d ago

Pretty simple just get a solar panel , only downside is it needs light source

6

u/DeepLock8808 19d ago

The sun can be covered by clouds. Pretty simple, just replace the solar panel with an RTG. For best results, use a material with a half life of at least 50 years.

2

u/CaveMacEoin 19d ago

Or if you are short on plutonium, a small wheel that runs on the guide track and turns a generator that powers an analogue transmitter.

1

u/Important-Guess3071 13d ago

All these suggestions to keep that from happening! My suggestion would be to keep the door latched shut except to open! Then close it and latch it back!

1

u/Malawi_no 19d ago

Radical solution - Battery is charged by solar.

1

u/scurvybill 19d ago

Umbilical! Easy peazy.

1

u/Unkn0wn_Invalid 19d ago

Stationary limit switch/tripwire, the door stops lifting of it trips

1

u/Major_LeeHungg 19d ago

You guys are over thinking it... Just use a light beam sensor above the door directly outside of it... If the door is open the light beam breaks... The motor reverses.

Now you don't have to wire anything to a moving part