20 Nov
2003
20 Nov
'03
10:37 a.m.
On Wed, 19 Nov 2003, Jim Battle wrote:
Jim Battle wrote:
...
Jim, what make/model of 8" drive are you using? The most usual DC
power connection to one looks like the 'sketch' below. The AC
power to the motor is a separate connector.
POWER CONNECTOR FOR 8" DRIVE
DC Power Connector
view looking at rear of drive
____ ____
| o |_| o |
| 2 _ 1 |
| o | | o |
| 4 | | 3 |
| o | | o |
|_6__| |__5_|
Pin Volts Amperes
1 +24 1.7 max
2 +24 Return
3 -5 Return
4 -5 0.07 max
5 +5 1.0 max
6 +5 Return
- don
After an hour of googling, I am unable to find
what power to feed it.
The connector on the back is two 3-pin molex connectors and looks like
this:
+-------+
| X X X |
+-------+
| X X |
+-------+
Duh, I turned on my brain and buzzed out the connector to the PC board.
If I number the connectors like this
+-------+
| 1 2 3 |
+-------+
| 4 5 |
+-------+
Then 2, 4, 5 = GND, 3 = +5V regulated, 1 is > +12V unregulated.
That is, pin 1 goes to a 7812 regulator, pin 3 goes directly to +5 on
the digital logic, and the other three are grounds.
I've gotten so used to quickly finding things with google I forgot some
of the old fashioned techniques -- like figuring it out myself.