Ok, I've been spending whatever free time I've had reading up on 555 timers and such. It's going pretty slow as I am a complete beginner at this and I don't have much free time anyway.
I've come up with a schematic which suits my needs - as far as I can tell - but I still have a few questions. Have a look at the attached image.
The circuit itself consists of 3 buttons which light the first set of LEDs for a different amount of time each, the second set should come on simultaneously and remain on for approx. 30 seconds.
When getting to grips with the schematic, for simplicity I left out the solenoid (it's actually a solenoid valve) I originally wanted. I would like to add the solenoid in series with the first 2 LEDs which will run for the same time as them. Can I simply add that in or will I have to go back to the drawing board?
I have not even looked at solenoid valves to buy - will the type of solenoid I use greatly affect my design (supply voltage/resistors/etc)?
The timings for each button are just estimates so that I could visualise the process - I still have to work out the exact values of my resistors/capacitors. Have I made this more complicated than it has to be? Do I have anything where it shouldn't be?
I am trying my best but I am beginning to feel a little out of my depth. It's time to consult more experienced people than me.
There is one more stage to the circuit which I will add once I am completely comfortable with the current stage. Any help is much appreciated. Feel free to give suggestions - I am not looking for someone to do this for me, but another point in the right direction would be great.
Thanks.