Offer flashlight with white LEDs in well-known ham radio chip analog timer 555. It can be used for lighting installation in inconvenient location as a pocket or a Bicycle lamp, etc.
The alternator is the 555 timer, the domestic counterpart of which is the chip CREW.
The oscillator frequency is about 100 Hz. At the output of the timer transistor switch VT1, collector set 3 white led type L-53PWC Kingbright company.
When you turn on the flashlight the generator produces a pulse which opens the key and controls the LEDs a powerful light sources, but with little energy consumption battery.
The flashlight is assembled in the case of the previously "Light bn-1-003", in which it is powered by four batteries type R20(D). Inside it has enough space for the installation of manufactured circuits.
The emitter performed as follows. The LEDs are soldered to the cap from normal bulbs type LN-6,3 (6.3 V, 0.3 A), which is screwed into the socket of the flashlight in the usual way. In principle, for the full implementation of its inherent flashlight functions need to make two of these led "bulbs", as in a flashlight there are still additional light bulb (frosted glass).
Author: P. Bobonich, Uzhgorod, Ukraine