Piggyaxe multi timer kit piggyaxe p a set of parts to build a multi purpose pocket timer the timer is fun to build and useful with great repeatability and long time delays possible the circuit provides an activity led a strident beep beep beep warning when the time is up and a visual warning too p p the circuit uses a self clocking binary counter that controls a number of relaxation oscillators that control each other p piggyaxe multi timer kit