MK 135 (Electronic Decision Maker)

Hello all!

I yesterday built the MK 135 (Electronic Decision Maker) and have discovered a strange malfunction:

It works by pressing a button and two LEDs begin to flash very rapidly and gradually slow down until only one remains on (YES or NO) for some 10 seconds and then fades away and the unit goes to sleep.

When the green LED (YES) remains on it fades away and everything is fine.

However, when the red LED (NO) remains on, it begins to fade away and suddendly turns off completly and then the green LED (YES) turns on and fades away. This happens ramdomly (not always).

What could be wrong here? It’s not supposed to act that way.



This is a property of the applied IC, there is nothing wrong