lbenson
Senior Member
I want to run an 08M2 with HC-11 wireless configured for lowest power consumption. The picaxe would report temperature changes and battery level, report in 4 times a day, and once a day ask for a response from the controller telling it what time it is. It would wait for up to a minute for a response, and then continue.
4 possible configurations for the AAs that I have thought of are:
1. run straight off of 3 AAs (easiest)
2. run off of 4 AAs with an LP2950 5V regulator, understanding that LP2950 gracefully passes through input voltages below 5V
3. use diodes to drop the voltage of 4 AAs to 5.5V, with the understanding that at very low currents, you won't get the "standard" .6V diode drop
4. run down 4 AAs to under 5.5V, and connect them straight to the picaxe.
Which, according to theory, would run longest?
Other suggestions welcome. I could use 5 AAs and the LP2950 in a 6-AA box.
4 possible configurations for the AAs that I have thought of are:
1. run straight off of 3 AAs (easiest)
2. run off of 4 AAs with an LP2950 5V regulator, understanding that LP2950 gracefully passes through input voltages below 5V
3. use diodes to drop the voltage of 4 AAs to 5.5V, with the understanding that at very low currents, you won't get the "standard" .6V diode drop
4. run down 4 AAs to under 5.5V, and connect them straight to the picaxe.
Which, according to theory, would run longest?
Other suggestions welcome. I could use 5 AAs and the LP2950 in a 6-AA box.