Re: TI-H: Since when do diodes have 3 leads?

[Prev][Next][Index][Thread]

Re: TI-H: Since when do diodes have 3 leads?


Some Surface mount diodes come in SOT-23 cases. The pins are so thin, it
helps to have a third to hold it, and the case is popular, so it's not
like the manufacturer need different machinery then. One process
packages both transistors and diodes. Cheaper.

If you look in a TI-85, you'll see that Diodes 7 and 8 on the main board
are actualy similar diodes. The number on those is M1M.

It's actualy more common than you'd think!!!

One of the M1M's in the TI-85 connect like this...

|___________
|   ____    |
|  |    |-__|
|_-|M1M |-
  -|    |-____
   |____|-

This could be for this particular diode, or a standard. I recomend using
a LED and a battery and testing if electricity flows from one pin to
another. It won't be difucult to determine the pins.


Williams, Matt wrote:
> 
> Maybe they accidentally sent you transistors.
> 
> >----------
> >From:  Robert Brack[SMTP:reb@netride.com]
> >Reply To:      ti-hardware@lists.ticalc.org
> >Sent:  Thursday, March 19, 1998 12:37 AM
> >To:    TI-86 Hardware List
> >Subject:       TI-H: Since when do diodes have 3 leads?
> >
> >
> >I got the backordered shipment of parts for link cables from Mouser today.
> >First of all, they overcharged me (I'm not too happy about that) and they
> >sent me 20 TINY dioded (SMDs?)  with three leads!!!  What the heck!!!  I
> >have several orders and cannot wait to send them back and order again.  Does
> >anyone know how to use those?  They have 2 on one side and 1 on the other.
> >
> >
> >----------------------------------------------------------------------------
> >--------------------------------------------------------
> >
> >   -Robert Brack
> >
> >   -reb@netride.com
> >
> >   -www.mynamehere.com/robert
> >
> >"Where do you want to go today?" - Bill Gates
> >"When do you want to crash today?" - Reality
> >
> >

-- 


Richard Piotter
richfile@prairie.lakes.com

The Richfiles TI Hardware and BASIC web page:
http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
References: