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Author Topic: HDD LED Circuit  (Read 5423 times)

Warlok

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HDD LED Circuit
« Reply #30 on: January 08, 2004, 10:04:18 PM »

I finally got the circuit working. I had to replace the IC and the opto and everything worked just fine.
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Skylined

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HDD LED Circuit
« Reply #31 on: January 08, 2004, 10:12:50 PM »

Check everything again.
Pin 4 is a low reference.
Pin 6 is a high reference.
So you have wired something wrong, recheck your connections.

Warlok: Happy to hear that it worked :)
See there is no need to make everything again like some said.
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Shojin Ryori

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HDD LED Circuit
« Reply #32 on: January 08, 2004, 10:34:59 PM »

Aren't 4,5,and 6 on the 3914 IC all going to negative? The only positive I see on the diagram goes to the LEDs, pin 3, pin 9 if the jumper is on, and pin 5 of the 4n2x (i'm not worried about that right now, I just want to get the 3914 test to work) [/img]
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Skylined

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HDD LED Circuit
« Reply #33 on: January 08, 2004, 11:04:55 PM »

Only pins that go directly to negavite are 2 and 4.
Pin 6 goes to pin 7
The pin that goes to ground is pin 8, and pin 8 is also connected to pin 7 through a 10k resistor.
Positive goes to led's anodes and pin 3, 9 by the jumper, and pin 5 of the opto through the 470ohm resistor.
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Shojin Ryori

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HDD LED Circuit
« Reply #34 on: January 09, 2004, 04:29:03 PM »

I still don't get why connecting pin 4 to 5 will turn the leds on from the first to the last.
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Skylined

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HDD LED Circuit
« Reply #35 on: January 09, 2004, 07:24:35 PM »

That isn't what matters, what matters is to make your circuit work, leave that part away.
Check you connections.
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Shojin Ryori

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HDD LED Circuit
« Reply #36 on: January 09, 2004, 09:55:30 PM »

I'm probably just gonna break down and rebuild on a different circuit board, because I have tested and tried it hooked up.  i'll tell you if i get it this time around.
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