1 1Steveo New Member Feb 11, 2006 #1 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?
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 Active Member Feb 11, 2006 #2 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.
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.
M MikeHibbett New Member Feb 12, 2006 #3 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.
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.