The flasher circuits below operate on a single 1.5 volt battery. LED flasher circuit diagrams. The circuit on the upper uses the popular LM3909 LED flasher IC and requires only a timing capacitor and ...

Discrete Component Replacement Circuit For The LM3909 IC; As the title says, first one is a replacement circuit for the LM3909 LED Flasher/Oscillator using discrete components. The circuit is ...

Word. Somebody here finally get it. The 3909 was a single chip charge pump that could light (and blink) an LED when the power source was below the forward bias voltage of the LED.

led flasher 3 Articles . The ... also does his customary reverse-engineering of the circuit, which is just a simple flasher ... has implemented the LM3909 circuit using discrete components on a ...

Note, there is a flasher version 3. Current through component and voltages on nodes can be displayed with a single click on the schematic. Having messed for ages with my little flasher circuit on the ...

The circuit works with any 1.5-V cell, even with a button cell. A good choice, though, is an alkaline AA-LR6 battery, which can power the circuit for several hours due to its 2700 mA-Hr capacity.