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 Post subject: Diode question
PostPosted: Thu Sep 18, 2014 11:43 am 
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I have a Rat clone that I'm sourcing parts for. It calls for a IN4002 diode, but the only one I could find online is too big to fit in the PCB (leads are too thick).

Is there a diode I can substitute in it's place on the PCB or does anyone know where I can find a smaller 4002?

Thanks as always!


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 Post subject: Re: Diode question
PostPosted: Thu Sep 18, 2014 11:45 am 
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timmcg1011 wrote:
I have a Rat clone that I'm sourcing parts for. It calls for a IN4002 diode, but the only one I could find online is too big to fit in the PCB (leads are too thick).

Is there a diode I can substitute in it's place on the PCB or does anyone know where I can find a smaller 4002?

Thanks as always!


Radio Shack should have that in stock. Generally any 1N400X series diode will work for polarity protection.

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 Post subject: Re: Diode question
PostPosted: Thu Sep 25, 2014 7:01 am 
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Also if no Ratshak you could always enlarge the hole if you have the bit tiny enough and your solder pad is big enough to allow for the expansion. I've done that here and there for one reason or another.

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 Post subject: Re: Diode question
PostPosted: Thu Sep 25, 2014 7:13 am 
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TNblueshawk wrote:
Also if no Ratshak you could always enlarge the hole if you have the bit tiny enough and your solder pad is big enough to allow for the expansion. I've done that here and there for one reason or another.


Or you could, you know, cut the lead of the component into a point, instead of wrecking the PCB ... crazy, I know, but I'd rather mess up a 1c didoe than a PCB!

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 Post subject: Re: Diode question
PostPosted: Wed Oct 08, 2014 1:52 pm 
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timmcg1011 wrote:
... but the only one I could find online is too big to fit in the PCB (leads are too thick). ...


I trimmed the original leads down short then soldered on some thinner leads so I could push a component into some sockets once...just a thought.

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 Post subject: Re: Diode question
PostPosted: Wed Oct 15, 2014 11:15 am 
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TNblueshawk wrote:
Also if no Ratshak you could always enlarge the hole if you have the bit tiny enough and your solder pad is big enough to allow for the expansion. I've done that here and there for one reason or another.

This practice is fine for single-sided PCB's but can be a real problem in double-sided boards with through-eyelets, like the BYOC kits use. With the double-sided configuration, you'll commonly have traces coming off the eyelets on the component side of the PCB. If you drill out an eyelet and thereby remove the through-hole sleeve, you'll likely sever the connection with a trace that attaches to that eyelet on the component side of the PCB, unless you solder on both sides of the eyelet. Just sayin'....

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 Post subject: Re: Diode question
PostPosted: Thu Oct 16, 2014 10:37 am 
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You're right Bob. My mind immediately went to Barry's old boards and I wasn't even thinking of the eyelet ones for some reason.

Thanks for the catch.

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powerpopguy wrote:
warm places theory sounds plausible. Occasionally, I wake up and think my snake is missing too, but it turns out it's just a chilly morning. :P


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