MK102 - Adjusting the timings beyond factory limits

Kits Mini Kits Range
1

Hello,

I’m looking to adjust the timings between the LEDS to last upwards of 15 seconds long each. Using the supplied components, the LEDS are only illuminated for roughly 2 1/2 seconds each before switching. How can I accomplish this? IE - which parts of the circuit need to be replaced and so on.

Thank you for your time.

Kikko

2

This is not a realistic goal with an astable oscillator, it will not work in a reliable fashion since component values will have to be extreme in order to achieve such long timing.
A better circuit for such purposes would be the MK188.