hi,
Attached a couple of drawings showing one way of getting 8 sequential delays periods [ON/OFF].
One is the proposed circuit diagram and the other a example of a layout in order to give you an idea of the board size etc....
These drawings will give you an idea of whats involved in making this project. It may look complex, but its basically 8 identical modules.
It uses 4 dual monostable HEF4528 ic's and 1 quad gate HEF4093.
Each of the 8 monostables has it own timing components R1/P1 & C1.
At power ON, ALL relays are energised [lights ON], waiting for the Push Button press.
When the P/B is pressed ALL the relays de-energise [lights OFF].
Monostable #1 is triggered, by the latch controlled by the PB1, this energises RLY1, via the FET driver.
At the end of the MS #1 period MS #2 is triggered, the RLY is de-energised.
The time delay before MS #3 is triggered is determined by MS #2 timing period,
at the end of the MS #2 period, MS #3 is triggered and RLY2 is energised.
This sequence is repeated for MS #3 thru #8.
As MS #8 is triggered the system is Reset and ALL the relays are energised [lights ON].
Summary:
the odd numbered MS ie: #1,#3,#5,#7 are the [light ON] relay energised
the even numbered MS ie: #2,#4,#6,#8 are the [light OFF] relay de-energised, between lights.
I have designed this circuit to give some degree of control of the ON and OFF times.
Assuming a ON/OFF times of about 20secs maximum, total around 120-160secs.
I wouldn't consider using this method for delay times greater than this.
If you wish to use this circuit I will advise you regarding the timing components
connected to pins 1/2 and 14/15 of the MS [monostables].
Typically for about a 20sec delay, P1 is a 1M0 single turn pot and the Resistor 1M0, with a 22uF 6Vwkg tantalum capacitor.
Comment:
A PIC based controller would be a more logical solution, especially if you want to
extend delay times to many minutes.
It will also give you much more flexibilty in future presentations.