Led flasher circuit

238

03:12:20

This is a simple LED flasher circuit.

published 8 years ago

Robert_Kidd

8 years ago

20mA for bright LEDs. You can reduce series resistors to 200 Ohm.

mercellustouthang

8 years ago

Hello..i m totally new to this app.after i have done making the circuit how will i test it

Robert_Kidd

8 years ago

Hi. Make sure you put a ground on your circuit. Decide what point(s) in circuit you want to monitor, highlight the point then hit the eye symbol.

Robert_Kidd

8 years ago

Hit the yellow triangle to start simulation.

varunjithtk22

8 years ago

can you please tell me what are those 47ohm resitsors for ? Also how did you arrive at 10uf for capacitors?Other resitsors i hope are current limiting for leds

Robert_Kidd

8 years ago

47kOhm resistors provide base current. I didn't post this circuit but 10uF could just have been a convenient value or may have been chosen to give particular frequency. There are formulae to calculate R & C values.

Robert_Kidd

8 years ago

Collector resistors limit LED current as you suggest.

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