I am working on a project and could use some experienced help.

The circuit need to do the following:
1-Run off of DC battery source
2-Have some kind of timer or clock
3-At desired time or when timer expires, trigger the relay for at least 1 second
4-Relay needs to fire some kind of motor or solenoid to open small door

Anyone have any suggestions or advice?

Thanks.

 

Yep. I have a great suggestion.

Use the search function and look for 555 timer circuits.

You WILL find exactly what you want.

 

My experience is that 555 based timers can work well only for short time delays of the order of a few minutes only, although the data sheet claim very long time intervals of even hours. The problem of getting long time delays is in finding a very good capacitor with low dissipation. Polypropylene capacitors work well but are not available in large values needed for long time delays.

 

555's can delay for hours fairly reliably, but if that won't work, try counters using "divide by (x) " IC's and a clock pulse. Calculate the necessary time required, and then use a 7555 as a monostable vibrator.

 

From the OPs description he specify a period or time. Maybe he can tell us what it is actually going to be used for.

 

Period of time involved will have a lot to do with the best way of going about the design, but what he's asking is easily done if we know that.