# Compact Door based 50/50 randomiser

##### Terrarian
Ive used this to make a random number generator, if anyone can help me make it other than 50% I'd be grateful

So how it works is that doors have a 50% chance to open either side, and with that we can do this.

In the pictures we see two dart traps being fired at the same time,

On the lower tube, the first pressure plate opens the door, and the second closes it.

If the door is closed:
no input to the logic gates is provided.

If the door is open:
the lower dart goes past the door, toggling the logic gates and closing the door.

On the upper tube we have a dart trap delayed by honey, which will trigger faulty logic lamps to check which lamp is active, and sending an output through the active one, if the dart goes through it changes the state, and if it doesn't then the state remains the same

Output comes out from ONE of the logic gates.

To create 1/4, 1/8, etc. chain more than one together.

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For more randomizers/randomisers, check this thread:

Possibly this one too, if you're set on using doors.

Hm... Why you don't use setup with faulty lamps?

It's easier to setup and allow to create any chances.

Hm... Why you don't use setup with faulty lamps?
View attachment 116153
It's easier to setup and allow to create any chances.
I didn't realise they were a thing when I made it
I've started using them now though, really much more compact.

edit: How would the number of lamps/additional gates affect the system by the way? I don't really understand that part.

I didn't realise they were a thing when I made it
I've started using them now though, really much more compact.

edit: How would the number of lamps/additional gates affect the system by the way? I don't really understand that part.

When you send an input to the faulty lamp at the top the logic gate will send a signal with a certain chance. The chance is equal to the number of normal logic lamps which are ON divided by the total number of normal logic lamps.

So if you had a logic gate with 2 ON lamps and 3 OFF lamps and a faulty lamp at the top, there will be a 2/5 chance it will send a signal.

So how it works is that doors have a 50% chance to open either side, and with that we can do this.
Neat. I like the trap-punk mechanisms, they're cool and clacky. I wonder how you would go about making a 2 outcome device like this, but entirely without the gates...? Also, will the same concept work just as well with spear traps and portal stations (in place of the dart traps)? For faster repetition. I think it could make for a cool novelty casino build.

Also, with this kind of setup, you could easily make a 1/4, 1/8, etc, by adding extra doors along the dart's path, right?

In terms of previous work, this is much like the old bird powered (pseudo) randomisers discussed previously. And @Baih started the thread of through on hoiktronic (door based) randomisers, here, that @DicemanX developed for his blackjack machine and @inomanoms also refined, in there.