Hi, I was just wondering if you could use 4011 or 7400 instead of 555 as clock generator.

 

Check this out as a possible option.

 

Interesting chek this page, they use an old Quartz clock :

http://www.josepino.com/?one_second_timebase

 

I tried to make it like 3 months ago but i couldn´t

 

if you make this using this way of Jose Pino´s , please upload pictures

sorry my english, but i´m learning

 

All it takes is one inverter from a 74LS14 hex-inverter package to make an oscillator.
(Just noticed it is described in the AN-118.)

 

This is a picture of what i made jejeje

 

ohh yeah it´s easier the way of t_n_k, but i like the way of Jose Pino´s