This LED circuit is powered only by the cell of 1.5 V with IC 555. The timer IC is used in astable mode similar to the double-circuit voltage, which is the step from 1.5V to about 2.5V. The frequency of the circuit is about 60 Hz and consumes very little left that is not a problem.
Part List:
R1- 39 kilo-ohms
R2- 100 kilo-ohms
R3-10 ohms but if no light or very dim, just short it
C1- 100nF
C2- 10nF
C3- 220uF electrolytic capacitor
C4- 100uF electrolytic capacitor
D1- preferably schotky diode but ordinary diode like 1N4001 will do
555- use the CMOS type 555
LED- red, yellow and other low power led (do not use white or blue)
1.5V- any 1.5V battery
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