hey i new member here . call me rendra im from indonesian and sorry for bad languange ?? that's nice job for build police flasher circuit?? but the 4017 flash twice on pin 3 and 4 .. ? max flash is 3. pin 3, 4, and 10 . then how build with more long flash ?
how about 3 555 timer and unknown material to build ?? BTW what your programs/software pcb and what type paper for etching the pcb ?
here the classic police flasher 2 555 timer by livewire