Battery Powered Night Lamp

Monday, May 13, 2013 | Labels: , , , | | This circuit is usable as a Night Lamp when a wall mains socket is not available to plug-in an ever running small neon lamp device. In order to ensure minimum battery consumption, one 1.5V cell is used and simple voltage doublers drives a pulsating ultra-bright LED: current drawing is less than 500µA. An optional Photo resistor will switch-off the circuit in daylight or when room lamps illuminate, allowing further current economy.

This device will run for about 3 months continuously on an ordinary AA sized cell or for around 6 months on an alkaline type cell but, adding the Photo resistor circuitry, running time will be doubled or, very likely, triplicates. IC1 generates a square wave at about 4 Hz frequencies. C2 & D2 form voltage doublers, necessary to raise the battery voltage to a peak value able to drive the LED.

1 comments:

  1. Anonymous says: March 25, 2014 at 2:36 AM  

    I would like to appreciate your work and would like to tell to my friends.for more details something like visit circuit breaker types get more informations.

Post a Comment

Note: Only a member of this blog may post a comment.

Subscribe to: Post Comments (Atom)