From vance@netcom.comFri Apr 21 10:55:38 1995 Date: Fri, 21 Apr 1995 10:01:35 -0700 From: Vance Gloster To: media@pcnet.com Cc: tmoravan@netcom.com, analogue@hyperreal.com Subject: Re: Divide and Multiply > I'm looking for a thing that someone must have built in the past - a simple > box that provides 1/2 and 2x of a trigger pulse sent into it. ie - take a The 2x trigger is a little involved, but here is a circuit that will do divide by two preserving pulse width. +5 ______ ______ o______| \ In o___________________________| \ | \ | | \ | NAND )O__________o out | | NAND )O_______| / | ________| / |______/ | | |______/ | ______ |_________________ |__| \ ___________ | | \ | | | | NAND )O___|\ clk | | +5 o____| / |/ Q |__| |______/ | | | _ | ____| D Q |__ | | | | | | | | | | D-type | | | | Flip-Flop | | | |___________| | |___________________| You can use a 74LS00 for the NAND gates and a 74LS74 for the flip-flop. I think both are available at Radio Shack. Enjoy! -Vance Gloster vance@netcom.com