Kapanadze Cousin - DALLY FREE ENERGY

[Jeg]

Hi guys. To Verpies or anyone else who feels familiar with this.

I would like to produce a pulse train with controllable time intervals with the less ic's. In the attached image i use two 555. The left one resets the right one and produces the effect i want, but i am not sure if it is a valuable method. What is your opinion?

[verpies]

I would like to produce a pulse train with controllable time intervals with the less ic's. In the attached image i use two 555. The left one resets the right one and produces the effect i want, but i am not sure if it is a valuable method. What is your opinion?

If by "controllable" you mean manual control, then you could use the dual TLC556 timer to decrease the package count (one half wired as an astable, that triggers the other half wired as a monostable).

But if I were you, I'd prefer an all-digital method (not relying on RC time constants) built around the 74HC40103 chips, because they are so cheap and can be wired without any programming down to 30ns resolution. 
The time intervals can be controlled with DIP switches + diodes or the 74HCT595 registers connected to an old computer (in lieu of the manual DIP switches).  The latter option is less expensive than switches ...surprisingly.

...and if programming is acceptable to you, then you could do everything in one 8-pin chip like the PIC 12F1612.  I am sure this  guy would help you with the program if you ask him.

[AlienGrey]

nn

[verpies]

Both are possible.
A fixed crystal oscillator can be easily bought for couple of bucks ( e.g. here ) or substituted with a PLL if a synchronization with an external signal is needed.

[Jeg]

If by "controllable" you mean manual control, then you could use the dual TLC556 timer to decrease the package count (one half wired as an astable, that triggers the other half wired as a monostable).

But if I were you, I'd prefer an all-digital method (not relying on RC time constants) built around the 74HC40103 chips, because they are so cheap and can be wired without any programming down to 30ns resolution. 
The time intervals can be controlled with DIP switches + diodes or the 74HCT595 registers connected to an old computer (in lieu of the manual DIP switches).  The latter option is less expensive than switches ...surprisingly.

...and if programming is acceptable to you, then you could do everything in one 8-pin chip like the PIC 12F1612.  I am sure this  guy would help you with the program if you ask him.

Thanks a lot Verpies. I will consider all the variables you mentioned before proceeding.

ps. (Even i think i already have some 556. I'll try to design it today and ask you again if something go wrong. )