I like a Simple 2 Lamp flasher circuit using MOSFET. Also, it is Astable Multivibrator. When you want a high power lamp flasher. This is a better choice for you. Why!
This high power led flashlight circuit look like torch by 1.5V battery only so it can be used, small so Easy to carry in various places,also very bright [...]
Do it yourself, not hard, but definitely save. Learn it more!
lets to see Automatic Op-amp night light circuit using IC-741. It is also very simple. As my feelings It has high sensitivity more than one,high accuracy.
This is a low voltage LED flasher or 1.5V LED flasher circuit using BC556 and BC546 transistors. And other electronic devices is 4 resistor and 3 capacitor