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Author Topic: How do I connect a LED to a CD-ROM?  (Read 1975 times)

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Offline OrjanTopic starter

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How do I connect a LED to a CD-ROM?
« on: July 25, 2004, 09:04:04 PM »

I am thinking about putting a slimline CD-ROM into my A1200, and I thought it would be cool to have an extra LED to show me when the CD-ROM is working or not... But I don´t know how to connect it.. I have only seen the Catweasel MkII S-class to have connectors for external LEDs, so I guess I have to hack a little...

Does one of the pins from the CD-ROM interface carry the LED indication, so I can connect it directly to the connector? Or perhaps you have a better solution for me?
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Offline OrjanTopic starter

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Re: How do I connect a LED to a CD-ROM?
« Reply #1 on: July 26, 2004, 11:25:58 AM »
Way ahead of you! :)

I intend to put a slimline CD-rom in my 1200, provide it with an extra LED, and do the PCMCIA LED "hack"... It´s gonna be so cool... :)

Anyway, if the IDE controller doesn´t have connectors for external LEDs, what can I do? I don´t want the HD LED on the 1200 to light up when the CD is working, I want a separate LED for it...
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- Seymore Cray, on virtual memory.
 

Offline OrjanTopic starter

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Re: How do I connect a LED to a CD-ROM?
« Reply #2 on: July 26, 2004, 01:15:45 PM »

Well, I am swedish, so everything made perfect sense... :)

So, it´s pin 39 controling whether the LED should be on or off? Can I just solder a cable to the back of the IDE connector and hook it up to a LED?
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\\"Memory is like an orgasm. It\\\'s a lot better if you don\\\'t have to fake it.\\"
- Seymore Cray, on virtual memory.
 

Offline OrjanTopic starter

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Re: How do I connect a LED to a CD-ROM?
« Reply #3 on: July 26, 2004, 01:35:57 PM »

I don´t think I´m going to build the device, I am probably going to buy one from ggsdata.se...

But in the schematic it says:

Optional LED:

    +5V DC      o---[220ohm]---->|-----[39]
                               LED

Now, all I want to know is if I can connect a LED like this, by soldering a cable on the opposite side of the IDE controller I am going to buy? Or how should I connect it to the CD-ROM so it lights up when the CD is active?
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\\"Memory is like an orgasm. It\\\'s a lot better if you don\\\'t have to fake it.\\"
- Seymore Cray, on virtual memory.
 

Offline OrjanTopic starter

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Re: How do I connect a LED to a CD-ROM?
« Reply #4 on: July 26, 2004, 01:41:32 PM »

I don´t think I´m going to build the device, I am probably going to buy one from ggsdata.se...

But in the schematic it says:

Optional LED:

    +5V DC      o---[220ohm]---->|-----[39]
                               LED

Now, all I want to know is if I can connect a LED like this, by soldering a cable on the opposite side of the IDE controller I am going to buy? Or how should I connect it to the CD-ROM so it lights up when the CD is active?
Logged
\\"Memory is like an orgasm. It\\\'s a lot better if you don\\\'t have to fake it.\\"
- Seymore Cray, on virtual memory.
 
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