Tinker Unique Posted September 29, 2011 Report Share Posted September 29, 2011 Viewed the 10 rotating (chasing) LED's on a CD with 9v. supply. - Nice. Would like the schematic modifications ( if needed ) for a 12v auto supply AND if a couple the LED's listed could be doubled and work the same. >> Lighting a 'dragons breath (flame) to appear as if it was 'active" in a resin spare tire cover to be activated when the stop light comes on. Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 29, 2011 Report Share Posted September 29, 2011 Viewed the 10 rotating (chasing) LED's on a CD with 9v. supply. - Nice. Would like the schematic modifications ( if needed ) for a 12v auto supply AND if a couple the LED's listed could be doubled and work the same. >> Lighting a 'dragons breath (flame) to appear as if it was 'active" in a resin spare tire cover to be activated when the stop light comes on.We don't know which chaser project you are talking about. Please post a link to it.Using a chaser of LEDs on the back of a motor vehicle might be illegal. Quote Link to comment Share on other sites More sharing options...
Tinker Unique Posted September 29, 2011 Author Report Share Posted September 29, 2011 A very similiar project is posted as a 3v chasing circuit. Was dropped from 7. to 3v using two batteries / driving 10 LED's. The project I have in mind will be on/in a fibreglas/ casting resin spare tire cover with a dragon "blowing" flame, and will only be lighted when the brake light is on ( 3d brake light ). And could be activated in/for car shows. It will not be 'that bright' but will be seen mostly during night driving. I have a 555 and 1470 IC and use Rasdio Shack LED's in craft projects sometimes with a resistor using 2 AA batteries. I can get 12v LED's for the dragon. I've seen where the IC's can handle the 12v supply OR use a resistor. Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 29, 2011 Report Share Posted September 29, 2011 I am the designer of the 3V and 6V chaser projects.They are designed to use low battery voltage and operate with extremely low average current so that a little battery lasts for a long time. Many extra parts are used to reduce the average current but still allow bright flashes.A much simpler circuit will work from a car battery and the average current will be too high for a little battery but will be fine for a car.You can use a 555 for the oscillator that clocks a CD4017 IC that has 10 outputs in sequence. Two to four LEDs can be connected in series to each output. Diodes and transistors are not needed.I don't know what is a "1470" IC. Quote Link to comment Share on other sites More sharing options...
Hero999 Posted September 29, 2011 Report Share Posted September 29, 2011 Why not use a CD4011 configured as an astable, rather than the old 555 timer? It uses much less power than the 555 timer and costs the same price. Quote Link to comment Share on other sites More sharing options...
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