Sorry, guy, my brain misfired this morning.
The ciruit should have been:

   PIC Output pin
         |
   +-----+------+
   |            |
   |            |
   |           ---
   |           ---    .1 to 2.2 uFd - value depends on drive pulse
   |            |                     rate, use smaller value with
   |            |                     higher rates
   |            |
   \            \
   / 1K         /
   \            \      10-100 Ohms - may not even be needed.
   /            /                     Limits peak current
   \            \                     from output pin.
   |            |
   |            |
   |     /------+
   |  | /       | //
   |  |/       ---
   +--|   LED  / \
      |\|      ---
      | \       |
 2N3904  |      |
         |      |
        ---   (VCC)
       ///
                ^
Note the LED anode now connects to VCC, instead of VSS.

At 11:01 AM 1/14/98 GMT, in a state of severe coffee deprivation,
Lynn Richardson wrote:
>Try this:
>
>   PIC Output pin
>         |
>   +-----+------+
>   |            |
>   |            |
>   |           ---
>   |           ---    .1 to 2.2 uFd - value depends on drive pulse
>   |            |                     rate, use smaller value with
>   |            |                     higher rates
>   |            |
>   \            \
>   / 1K         /
>   \            \      10-100 Ohms - may not even be needed.
>   /            /                     Limits peak current
>   \            \                     from output pin.
>   |            |
>   |            |
>   |     /------+
>   |  | /       | //
>   |  |/       ---
>   +--|   LED  / \
>      |\|      ---
>      | \       |
> 2N3904  |      |
>         |      |
>        ---    ---
>        ///    ///
>
>The LED will appear to be on solid when the pulse rate is more
>than 30 per second.
>
>
>
>On Wed, 14 Jan 1998 09:16:58 +0200, you wrote:
>
>->Trying to run a PIC 16F84 with 2V i came to tihnk if there is any
>->possibilities to make a LED to run with only one NiCd that has the
>output
>->valtage of about 1.2 V. Led needs about 1.6 V.
>->The system should not have any fancy IC's and it should fit in the
>size of
>->half of an AAA-cell.
>->
>->Virtual beer for the best idea !
>->
>->--------------------------------------------------------------------------
>->PTM, pasi.mustalahti@utu.fi, ptmusta@utu.fi,
>http://www.utu.fi/~ptmusta
>->Lab.ins. (mikrotuki) ATK-keskus/Mat.Luon.Tdk
>OH1HEK
>->Lab.engineer (PC support) Computer Center
>OI7234
>->Mail: Turun Yliopisto / Fysla, Vesilinnantie 5, 20014
>->Pt 02-3336669, FAX 02-3335632 (Pk 02-2387010, NMT 049-555577)
>->--------------------------------------------------------------------------
>

---------------------------------------------------------------------------
Lynn Richardson - Design Eng.|WA0ZNL            |Progress Instruments, Inc.
DC - 1GHz, RX, TX 100W, PLL  |WA0ZNL.AMPR.ORG   |807 NW Commerce Drive
ASM 6805, 8051, Z8, PIC      |44.46.176.3       |Lee's Summit, MO 64086
C                            |lrich@proginst.com|P(816)524-4442 F 246-4556