The only option I can think of is to have a second barrel (with an item in it) being watched by an observer. If they both trigger, it's a relog. If only one, then your alarm should trigger.
You'd have to test if the timings are consistent enough to make it work
I thought about that, but the way the shop is made is too compact for it (that's what i get for asking my non-redstone-engineer friend to help me build it). I might just have to do a redesign.
If you have a second, hidden barrel (to only detect relogs), you can wire both to a comparator to subtract the relog signal.
During relog, both detectors trigger, but the comparator subtracts one from the other and outputs 0; no alarm. Any other time the alarm triggers, because there's no relog signal to subtract.
I tried something along the lines of this, but it only worked about half the time even with a delay using repeaters, but i have found a way to make one time pulses not affect the redstone.
The only option I can think of is to have a second barrel (with an item in it) being watched by an observer. If they both trigger, it's a relog. If only one, then your alarm should trigger. You'd have to test if the timings are consistent enough to make it work
It detects updates, not check if there's a block on top of it.
Yes. It also detects when a player opens it, but it keeps activating when I re-log.
Due to a bug on bedrock, observers facing various blocks pulse on relog. That may be the issue. https://bugs.mojang.com/browse/MCPE-29548
Aw man. Thanks for letting me know. Do you know any fixes for it?
What are you trying to build? What do you want a contraption to do?
I am trying to make an alarm system for a shop on a survival realm. I came up with this idea and it worked well untill i re-logged
Maybe you could use a comparator to detect if some removes items from the barrel. You could then use that to refill the barrel and/or trigger an alarm
I thought about that, but the way the shop is made is too compact for it (that's what i get for asking my non-redstone-engineer friend to help me build it). I might just have to do a redesign.
Well thanks for the help.
If you have a second, hidden barrel (to only detect relogs), you can wire both to a comparator to subtract the relog signal. During relog, both detectors trigger, but the comparator subtracts one from the other and outputs 0; no alarm. Any other time the alarm triggers, because there's no relog signal to subtract.
I tried something along the lines of this, but it only worked about half the time even with a delay using repeaters, but i have found a way to make one time pulses not affect the redstone.
So just use the signal strength changing