Basic electronic circuit help needed, non-automotive. - TCCoA Forums
 
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post #1 of 5 (permalink) Old 10-17-2005, 04:08 PM Thread Starter
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Basic electronic circuit help needed, non-automotive.

I'm having a little trouble designing a circuit, and I need a little help.

It's a very simple flasher circuit, alternating between two sets of LEDs; so when they're placed in between each other, it appears that they are chasing. I need a brightness control, speed control, and an all on/all off/chase switch.

I'll be using superbright white LEDs (~8000mcd), 45 degree viewing angle. VF= 3.5v (4.0 max), IF = 30mA. There will be between 50 and 60 LEDs total.

I'll likely be using a string of AA batteries for power.

Any input is appreciated.. I gotta get this built before the night of the 29th!

1990 XR7 3.8L SC - Still waiting for time and money to come together at the same time..
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Cowboys still do ride horses. Only today it's not just one at a time.
It's 454, each one alive, penned in 8 cylinders. Eating asphalt. Kicking dust.
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post #2 of 5 (permalink) Old 10-17-2005, 04:33 PM
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How about this:

http://ourworld.compuserve.com/homep...tm#555leds.gif

bottom of the page.

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post #3 of 5 (permalink) Old 10-17-2005, 05:10 PM Thread Starter
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Okay, that's a start, thanks.. I was actually thinking about using solid-state relays to cut down some of the wiring, but I'm not sure yet.. and this would have to be adapted for the speed and brightness controls, and the 3-way switch.

1990 XR7 3.8L SC - Still waiting for time and money to come together at the same time..
1991 Ford Ranger
2003 Ford Escape


It's an MN-12 thing... you wouldn't understand.

Cowboys still do ride horses. Only today it's not just one at a time.
It's 454, each one alive, penned in 8 cylinders. Eating asphalt. Kicking dust.
Screaming out loud, "Don't you dare stop for water."
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post #4 of 5 (permalink) Old 10-17-2005, 05:35 PM
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Pop into chat if you have the time. Used to see you there all the time.

_/_/_/_/_/_/_/_/ I like intakes that whine \_\_\_\_\_\_\_\_

# SELECT * FROM users WHERE clue > 0;
# 0 rows returned
# drop table users;_
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post #5 of 5 (permalink) Old 10-20-2005, 08:00 PM Thread Starter
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Okay, this is what I have so far:



Right now, the lights cycle at about 1Hz. I would like to be able to adjust the frequency from that, up to a much higher frequency with a potentiometer. Also, bear in mind there will be again, between 50 and 60 LEDs that I will also need to be able to adjust the brightness for.

1990 XR7 3.8L SC - Still waiting for time and money to come together at the same time..
1991 Ford Ranger
2003 Ford Escape


It's an MN-12 thing... you wouldn't understand.

Cowboys still do ride horses. Only today it's not just one at a time.
It's 454, each one alive, penned in 8 cylinders. Eating asphalt. Kicking dust.
Screaming out loud, "Don't you dare stop for water."

Last edited by LiquidCougar; 10-20-2005 at 08:05 PM.
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