snug_gles said:33uF tantalum or also using 22uF tantalum.
Want to get at least 2 minutes from the 555 timer.
Will test with a lower value resistor to increase the current to the cap later.
I am just wondering if the leakage current thru the 33uF cap is about the same current thats charging it via the 5.6M.?
I know that by trying a lower value resistor you will have a shorter delay, but its just a test set up.
If it works OK, you could try a 100uF tant, with a 5.6/3 = 1.8M