| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 3879.1 | short pulse (spike!) | WJG::GUINEAU | | Tue Jun 26 1990 20:04 | 19 |
|
The 2090(a) should work fine with a SCSI hard disk - actually it will appear
as though the light doesn't blink at all!
I suspect you have the led cable connected incorrectly. There are 2 sets of
pins on the 2090(a) for led connection. They are located right next to
each other. Try moving the connector to the other set of pins.
Now the light will blink very slightly when the disk is acessed. This is
because the 2090 only blinks the led for SCSI drives during actual DMA - which
is of very short duration, hence not enough energy to light the led.
If you'ld like, I can upload a schematic of a simple circuit I designed and
built which will stretch the LED pulse comming from from the 2090(a),
making the LED look great! The whole thing costs about $5.00 and 1 hour
of your time.
john
|
| 3879.2 | | MQOFS::DESROSIERS | Lets procrastinate....tomorrow | Thu Jun 28 1990 14:46 | 10 |
| Most drives have a set of pins on which you can connect a led, this is
what I did when I installed a SCSI drive on my 2090a. In fact I made
another hole next to the green led and now I have two leds, one for
each drive. Another possibility is to use a bi-color led, one side
driven from one drive and the other from the other drive, a guy in our
group did just that and it quite a show to see the led glow green then
red then orange (when both drives are active)
Jean
|
| 3879.3 | Everbody shoulda have one... | FROCKY::BALZER | Christian Balzer DTN:785-1029 | Fri Jun 29 1990 04:12 | 9 |
| Re: -1 (bicolor LED)
To the best of my knowledge, the HD-LED of the B2000 is a bicolor version,
at least mine is.
I use the the green mode, since a red flickering at this particular location
has my subconcious crying "GURU"... ;-)
<CB>
|
| 3879.4 | Ok for the schematic | LUCCIO::RONCAGLIONI | Luca, IW2BQB in Milan -ITALY- | Fri Jun 29 1990 13:39 | 7 |
| Hi John! I'll check for the cable connection this weekend.
I'll be more than happy if you can upload the schematic you told in (.1).
Thanks!
Luca
|