Hero999
Banned
An LM317 has a quiescent current of 10mA so, no, it won't last for that long.audioguru said:Use two 9V alkaline batteries in series and an LM317 voltage regulator adjusted for an output ov 13V. The current (only 0.5mA?) is very low and the batteries will last for years.
The voltage regulator IC doesn't oscillate. its output voltage is solid.