4 AA (6volt) to Lcd rated a 5.5 volts Max

[1Steveo]

Can I do it? has anyone tried?
My Pic mirco's can live with the 4 aa's (6/volts).
What about a LCD rated the same?

 

[Oznog]

Too high for your LCD, and too high for the PIC. Just because you saw it work won't guarantee it works at different temps or reliably over a long period of time. Add a low dropout (LDO) reg and a couple of caps.

 

[MikeHibbett]

Stick a series diode in with the supply. Like a 1n4001

The only problem is that the display contrast will dim with decaying battery volts, and will be unreadable before the circuit itself stops.

I now use 2 AA cells and a MAX619 DC-DC converter. That part delivers 30mA @5v across the life of the 2 cells, and only needs 2 0.1uF caps.

Dont forget to power your led's off the batteries rather than the output of the DC-DC converter!

Mike.