I need help with a circuit for a chasing led display

[Bernie_of_CPE]

Hi Chaps,

First posting for a model making enthusiast with very basic electronic knowledge. I need to make assorted lighting schemes for replicas I build, flasing nav lights and landing bay sequencing lights that sort of thing.

I have been fascinated to look at some of the articles here, and decided if there ever was a forum to help with this kind of task it wouldn't be anywhere better than here so here I am..!

I am a bit of a fan of the 1970's Gerry Anderson Series UFO and was always fascinated by the flashing light display used to decorate the sets. I want to replicate a display of a grid of lights used in the opening titles and am wondering if this is possible?

I have seen a few circuit designs here that could be adapted I guess but they seemed to use all the available outputs from the driver chip, max I found was 8 LED's.

So, could a simple circuit be drawn that could flash a ring of 16 Led's each in turn and would it be possible to control the rate of cycling and persistence ?

All help would be appreciated.

Bernie

 

[Fleck]

Like the roulette circuit, but using 2 counter chips?

 

[j dorfman]

Hi Chaps,

First posting for a model making enthusiast with very basic electronic knowledge. I need to make assorted lighting schemes for replicas I build, flasing nav lights and landing bay sequencing lights that sort of thing.

I have been fascinated to look at some of the articles here, and decided if there ever was a forum to help with this kind of task it wouldn't be anywhere better than here so here I am..!

I am a bit of a fan of the 1970's Gerry Anderson Series UFO and was always fascinated by the flashing light display used to decorate the sets. I want to replicate a display of a grid of lights used in the opening titles and am wondering if this is possible?

I have seen a few circuit designs here that could be adapted I guess but they seemed to use all the available outputs from the driver chip, max I found was 8 LED's.

So, could a simple circuit be drawn that could flash a ring of 16 Led's each in turn and would it be possible to control the rate of cycling and persistence ?

All help would be appreciated.

Bernie

Hi Bernie I just signed up today because I enjoy these forums. To answer your question about the LED flasher circuit, I have found one that may fit the bill with some modification from you.

The Chip you might use in this circuit comes in many different configurations. The one I recommend is RS 74154 available at either Radio Shack on line or in some stores and manufactured by other companies. It is a 4-line to 16-line decoder/demultiplexer, that is to say you will get 16 separate outputs from 4 inputs. This is a similar circuit to something like the one used in the original Night Rider circuit to flash the Lights on the front of the "Kitt" car with added sound effects. Other components are needed to complete the circuit function. If you type in " 16 led sequencer circuits projects " it should take you to a page with many of that type circuit using different chips that can do the same thing. You will then have a choice of configurations you can use. As far as the chip I mentioned previously, you will need to do some exploring online or by word of mouth to find a cross reference if you wish to go with that. The input voltage is 5.5volts and VCC is 7 volts. I will upload a picture for you to see what the logic circuit looks like. I wish you the best of luck with your projects.