So, it is better to use the ADC10 onboard. Why do i need the op amp? the uC is low power and can take form 0- 3.6 V.Will it still work without the launchpad? Ty all so much for puting up with my dumb questions. What is the tehniqe if i want to write to flash, do i have to write it segment A, B , C, D or can i use a trick and write to the difrent part of the segment?