alternating LED flasher using 12Vdc supply and 555 timer

[tr1]

could some one direct me to a ckt. diagram please? I would like to assemble an alternating
LED flashing ckt. for use on a model railroad, your help is grately appreciated, thankyou,tr1.

 

[CocaCola]

Google "two transistor flasher" skip the 555 it's overkill..

 

[tr1]

thankyou,cocacola,tr1

 

[CDRIVE]

We have one here.

https://www.electronicspoint.com/3v-2-led-flash-circuit-t247808.html#post1465558

Chris

 

[tr1]

CDRIVE ,THANX, for your instructions, tr1

 

[CDRIVE]

Your welcome. Here's an updated version for 12V operation. The LEDs should flash at about 1 Hertz. Each LED is on for 1 second while the other is off. Please note that it's important to observe the polarity of the caps as shown.

Personally, I'd use a 555 because it would only need one timing cap and fewer components.

Chris

 

[Dispatch32]

What would you need to adjust if you wanted to use Three instead of One 12 Volt Yellow LED's as Alternating Flashing Lights?

Could you please draw up a diagram for 12-14 Volt DC Input a using a 555 Timer IC and Three 12 Volt Yellow LED's on each half of the alternating Flasher circuit?

 

[danadak]

https://www.instructables.com/simple-alternate-LED-flashing-using-555-timer/

https://mechatrofice.com/circuits/555/led-flasher-circuit


Regards, Dana.

 

[Dispatch32]

Thank you very much! I think the one using 12 volt input, 2 555 timers and 2 transistors, plus resistors and capacitors should work for my 12 volt LED's I plan to use on my vehicle for 2 sets of 3 Alternating Yellow Warning Lights. I just need to get a few items and start putting together a test circuit.

 

[danadak]

Protect the circuit from load dump -

https://m.littelfuse.com/~/media/el...n_automotive_environment_application_note.pdf

Also consider using a dual 555 timer -

https://www.ti.com/lit/ds/symlink/ne556.pdf?ts=1653639239224&ref_url=https%3A%2F%2Fwww.google.com%2F


Regards, Dana.

 

[hevans1944]

What would you need to adjust if you wanted to use Three instead of One 12 Volt Yellow LED's as Alternating Flashing Lights?

Could you please draw up a diagram for 12-14 Volt DC Input a using a 555 Timer IC and Three 12 Volt Yellow LED's on each half of the alternating Flasher circuit?

SEE MY RESPONSE TO DANA, BELOW.

Protect the circuit from load dump -

https://m.littelfuse.com/~/media/el...n_automotive_environment_application_note.pdf

Also consider using a dual 555 timer -

https://www.ti.com/lit/ds/symlink/ne556.pdf?ts=1653639239224&ref_url=https%3A%2F%2Fwww.google.com%2F


Regards, Dana.

The two of you please note the date of the last posting to this thread: CDRIVE, Mar 26, 2013, post #6.

This thread is DEAD and it is quite likely that CDRIVE is too. The last time I tried to talk to him, his wife said he had suffered a stroke. I got the distinct impression that his wife was having a hard time coping with it, so I decided not to try to intrude on them any further. Back in the day, CDRIVE was a prolific contributor to this forum. I miss him a lot. Perhaps a moderator, or the owners of this website, could "look him up" and find out if he regained his health or, like @KrisBlueNZ, sadly passed away...

Hop -- AC8NS

 

[Martaine2005]

Poor uncle Chris (CDRIVE), I miss him too.


Martin