10 Year Led Flasher (Version 2 With Boost Converter)

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Introduction: 10 Year Led Flasher (Version 2 With Boost Converter)

About: Music: my profession for over 40 years... Electronics: my beloved hobby always.

This LED flasher will blink for 10 years on a single 1.5v AA cell. My previous circuit used a blocking oscillator to generate the Vdd voltage for IC1. This circuit relies on a BOOST CONVERTER configuration (inductor-diode-capacitor) . Output voltage is high enough to drive at least 5 leds series-connected.

Step 1: 10 Year LED Flasher (V.2) at Work

Step 2: Circuit Diagram

Step 3: Astable (flash Rate)

Step 4: Monostable (pulse Width)

Step 5: Transformer

Step 6: Boost Converter

Step 7: T1 Secondary

Step 8: Start-up

Step 9: Managing Energy

Step 10: Current Drain

Step 11: For More Details and Waveforms, Watch Video

Step 12:

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11 Discussions

Nice work, c3 i use 10uf25v ok :D

0
user
DUYKT

1 year ago

Hi!

How to green led high bright more than??? what i should change value resistor?

0
user
DUYKT

1 year ago

my circuit is done but led no flash, when i connect jumper then led flash one and end? please help me

4 replies

post an image of your circuit. See if I can help.

Hi, transformer 12V to (black) connect to???

ba-1.jpg

one of the blacks to battery (+) the other to transistor Collector + diode anode +jumper. The yellow (center tap) is not used.

0
user
DUYKT

1 year ago

in video, i see you use 4 capacitors, in circuit diagram: 3 capacitors???

1 reply

the 4th cap is for decoupling but is not mandatory. (not necessary)

0
user
DUYKT

1 year ago

Hi! Can i change transistor BC337 by 2N4401? I don't understand the transformer work by method and create transformer???

Sorry i noob english.

1 reply