Was given some JK flip flops last weekend, was wondering if anyone had a cool project I could do with them.

 

You could create a binary clock, or a timer using a binary counter.

 

Binary LED clocks are very cool.

Amaze your friends.

It also helps you to practice binary/hex/decimal conversions in your head.

 

will do thank you, for my clock I will need to find a 555 timer right?

 

Yeah, but a 555 timer won't be very accurate.

Look at using a 74HC4060 driven by a crystal oscillator instead.
Datasheet: http://www.datasheetcatalog.com/datasheets_pdf/7/4/H/C/74HC4060.shtml

 

ok I'll have to look around for that 74HC4060, looks difficult to understand their design on page 5 but I'll give it a shot.

 

It certainly wouldn't be very accurate if I had to do Bin/Hex/Dec in my head to make it work.
Them is long years buried in the past. I doubt if I could even find my HP's now.

 

But that is the point. Practice makes perfect.