a 2-to-1 multiplexer and 2-to-1 demultiplexer are equivalent to a 2-position relay from logic standpoint. They differ in construction technology and practical applications (MUX used in high-density, high speed logic circuitry, relay used to control high-power lines) but since redstone power doesn't make this distinction, a redstone MUX is equivalent to both. Sharfpang-fduser (talk) 13:18, 10 May 2022 (UTC)
the description calls it a 1x1x4 circuit but the picture is definatly a 2x1x3 with redstone wire on top of the top right block for the fourth level in height
so the pix is a 2x1x4 that might be able to reduce to a 2x1x3 if redstone can move down two 73.45.66.32 04:58, 30 September 2015 (UTC)
We don't count outputs when calculating circuit size because the output shown is just an example of what you might do with the circuit -- instead of redstone dust you might briefly power a piston, activate a dispenser, etc. And the circuit is 4-high because the space is needed above the circuit for the piston to push the block of redstone into. —munin · · 17:13, 30 September 2015 (UTC)
Thyristor over-complicated?[]
It appears that the thyristor as described here is digital, i.e. input voltage is not preserved, and there is no breakdown voltage? Wouldn't that make it equivalent to an AND gate with the output fed back into one of its inputs? Since one of the designs already contains an AND gate for other reasons, it seems unnecessarily complicated. 51.174.25.89 01:28, 4 September 2020 (UTC)
You are right in that this seem to act not like a real thyristor. This here seems like something closer. When the button is pressed, if the chest is non-empty it will output its value via the block that will connect the comparators until it is emptied, at which point the piston will retract and it will reset. - AD OffKilter (talk) 02:24, 26 May 2022 (UTC)
Faster ABBA[]
The ABBA circuits shown are mostly the kind that use repeaters to delay the input and then delay the signal when the input is cut. When charging up, it works fine. When the signal is cut, there is a delay. Assume there are four outputs (A, B, C, D) and a 4 tick delay between each one. When turned on, A comes on right away. Four ticks later, B turns on. Four ticks later, C turns on. Four ticks later, D turns on. When power is cut, it takes 12 ticks (4 between A and B, 4 between B and C, 4 between C and D) to discharge the incoming line. Then, the discharge actually begins. D cuts off. Four ticks later, C cuts off. Etc... But, that can be fixed by completely killing the input line when power is removed. For example, if each line has a solid block between them, place a sticky piston that pushes the blocks into place when power is added and pulls them out when power is removed. Then, the entire input line will lose power immediately when power is removed. The discharge of D will begin right away, then C, then B, then A. I don't know how to edit this stuff, but I would like someone else to do it if possible. I'll try (and fail) to give an example below:
The input line goes, from left to right, a solid block, a 4-tick rpeater, a solid block, a 4-tick repeater, etc...
In between, I place repeaters to keep the signal from backing up.
The output line is the opposite of the input. There is a solid block for each output and a 4-tick repeater pointing the opposite direction of the input between each pair of blocks.
To make it discharge fast, place a sticky piston on each input block. When powered, the block is between the repeaters. When unpowered, the block is pulled back. Tie that power line into the main input power line. So, when you power the circuit, it works. When you cut power, the blocks pull away and it discharges quickly.
Why does it matter? I built a tall elevator with 8 pistons. They have to fire in order going up and in reverse order going down. Going up is good. Press a button and it goes up. Going down is bad. You have to wait the time it would take to go all the way up before it starts going down. By adding the sticky pistons to kill the input line right away, going down begins immediately instead of taking a long time.
Mistake in the first hysteresis circuit[]
The first circuit shown is actually not a 1-15 hysteresis but a 1-14. Its redstone feedback wire is 2 segments long, thus suffers signal degradation and the resulting redstone signal strength at the comparator input is only 14 at max. In order to make it a 1-15 Schmitt Trigger the redstone torch would have to be attached sideways to the top gold block and not on top of it, so that it powers the feedback redstone wire with signal strength 15 and not 14.
This works as advertised near as I can tell. It's a 0-15 since the comparator is in subtract mode. I just double-checked it here locally. It will only turn on at 15 and will only turn off at 0. - AD OffKilter (talk) 15:10, 24 May 2022 (UTC)
Correct, my mistake. Unfortunately I cannot delete this topic since I'm not registered, so perhaps a moderator or admin could delete this? Thanks in advance.
No worries. But per talk rules though I think we need to keep this discussion now that there's been a reply. - AD OffKilter (talk) 22:35, 24 May 2022 (UTC)
· 17:13, 30 September 2015 (UTC)
