Remote control by Microchip's MCU

[stefk]

remote control microchip consumption

Hi friends,
I have a problem building PIC based remote control transmiter.
The problem is power supply of the MCU. I must use 12V battery to supply the transmiter, but for MCU I need 5V. I don't want to interrupt the power supply of the MCU by buttons, but in same time I want to reduce the power consumption, so I can't use simple voltage regulator to supply the MCU. Any ideas?
Thanks.

 

[swordman]

U can use lm2575 or similar

**broken link removed**

 

[Nick C.]

Linear (and others) have some very low
dropout regulators. For simple control
applications, you might also consider running
the MCU at the lowest speed possible for
further power savings.

 

[btbass]

Use the PIC16HV540, it can run on a power supply from 3-15Volts.
It has an inbuilt voltage reg for port A, either 3.3 or 5 volts.
Port B works on the main supply.
Can also go to sleep to save power.
I've used it running on a 9volt battery.