This is my second creation, i hope you all like it, i made the footprint (size) of the design as small as possible while keeping functionality, it uses 3 pistons to hide the hole the dispenser shoots from, when triggered (the input MUST be inverted, I.E. if its triggered the input must be off) the 3 pistons retract and reveal the hole the dispenser shoots from, and trigger the dispenser once
Feel free to use this device in your own creations, just give credit to me