Need LED Circuit - Electronic Circuits Projects Diagrams Free

papaharry582 · 15th May 2008, 02:00 AM

OK Folks, here goes,

I am a 61 year old rookie and I need a 12vdc circuit that will light 6 LEDs in order, turn them off and start all over again. I'm not sure how to do this, but I will try to give you a step by step diagram: 1= on 0=off

Step 1 000001
Step 2 000011
Step 3 000111
Step 4 001111
Step 5 011111
Step 6 111111
Step 7 000000

Then the circuit repeats.

My guess is there is someone out there that can design a circuit that will do just about anything, except maybe fix a rainy day.

Thanks

blueroomelectronics · 15th May 2008, 02:04 AM

Bog easy with almost any microcontroller.

colin mac · 15th May 2008, 04:29 AM

You could invert 7 outputs of a 4017. Use 6 of them to trigger a 555 bistable
and the 7th to reset them.

Torben · 15th May 2008, 04:41 AM

My idea was similar to Colin's but involved driving a 4094 shift register from a 555 astable to do the dirty deed. Then you don't need to invert the outputs, but you'd need to use the final (7th) output to reset the counter.

Torben

Ubergeek63 · 15th May 2008, 09:44 AM

Quote:

Originally Posted by blueroomelectronics

Bog easy with almost any microcontroller.

If you have the skill to write and the hardware to program. Not likely in the case of a first timer.

on1aag · 15th May 2008, 10:14 AM

Hi Papaharry582,

If you search the forum you'll find more circuits than
you can handle. Here's one of many.

If you move the reset from Q1B to Q3B you can add two extra leds.

on1aag.

papaharry582 · 15th May 2008, 04:48 PM

Thanks All,

on1aag, I'll give it a try. It will be a learning experience for me, but maybe learning something will keep my two active brain cells from turning to stone.

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15th May 2008, 02:00 AM	(permalink)
papaharry582	Need LED Circuit OK Folks, here goes, I am a 61 year old rookie and I need a 12vdc circuit that will light 6 LEDs in order, turn them off and start all over again. I'm not sure how to do this, but I will try to give you a step by step diagram: 1= on 0=off Step 1 000001 Step 2 000011 Step 3 000111 Step 4 001111 Step 5 011111 Step 6 111111 Step 7 000000 Then the circuit repeats. My guess is there is someone out there that can design a circuit that will do just about anything, except maybe fix a rainy day. Thanks

15th May 2008, 02:04 AM	(permalink)
blueroomelectronics	Bog easy with almost any microcontroller. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

15th May 2008, 04:29 AM	(permalink)
colin mac	You could invert 7 outputs of a 4017. Use 6 of them to trigger a 555 bistable and the 7th to reset them.

15th May 2008, 04:41 AM	(permalink)
Torben	My idea was similar to Colin's but involved driving a 4094 shift register from a 555 astable to do the dirty deed. Then you don't need to invert the outputs, but you'd need to use the final (7th) output to reset the counter. Torben

15th May 2008, 10:14 AM	(permalink)
on1aag	Hi Papaharry582, If you search the forum you'll find more circuits than you can handle. Here's one of many. If you move the reset from Q1B to Q3B you can add two extra leds. on1aag.

15th May 2008, 04:48 PM	(permalink)
papaharry582	Thanks All, on1aag, I'll give it a try. It will be a learning experience for me, but maybe learning something will keep my two active brain cells from turning to stone.