very small timer (maybe SMD)

[psychoboy]

Hi all, i would like to find schematics or links for a very small timer, it can be smd, it has to power a coil when the count reaches 0, count from seconds to soming like 10 minutes, have a led display, it can also use a cheap pic, (btw i never did) i live in argentina , so like i said it has to be cheaper and the components easy to find...
and... also small, it has to fit in an airplane model

 

[batdin]

Hi,
Using PIC is a good approach provided you have already dealt with them.
Otherwise,you should use the more "classic" CMOS .
How will you determine the time?Switch?Potenciometer?
What LED? 7-segment display or just a set of LEDs?
If the simplicity and price are important,use a simple CMOS monostable with variable time-constant.

 

[imported_Moderator]

Use PIC10F from microchip. it has a 4 Mhz internal oscillator and 8 bit timerin 6 pin sot 23 package. it can be used to replace 555 timers.