My project details:
2. Nokia 5110 LCD (Brightness varied by PWM)
3. Some switches
4. Planning to power it by AA/AAA batteries - 3/3.3V
My question is - Do I need a voltage regulator at all??
If not, can I power it directly with 2 AA batteries?
What protection I need to incorporate?
If yes, then I need to use 3 batteries. Moreover using a voltage regulator will increase the cost.
I know its more of a general electronics question, but avrfreaks has been my goto site of late :)