Principally this both simple low voltage LED flasher circuit diagram are same, using voltage doubling principal with the additional of transistor to allow the capacitor to discharge faster and supply great current about 40mA peak. A large capacitor 1000uF in series with330 ohm resistor would increase the flash duration to about 50mS. The discrete 3 [...]
This circuit diagram show a simple low voltage LED flasher with a single 1.5 DC volts battery, the popular LM3909 LED flasher IC, and a few components. The capacitor uses as a time generator for the LED sequence, variable depend on its values. Many functions and applications of this circuit diagram. Very easy to build, [...]
Designed by Andre de-guerin, this low voltage LED flasher circuit diagram is using two section of a 74HC04 hex inverter IC to create squarewave oscillator that establish the flash rate, while a third section is used as a buffer that charged the capacitor in series with 470ohm resistor while the buffer output is at +1.5V. [...]
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