29 Mar
2018
29 Mar
'18
7:56 a.m.
On Sun, Mar 25, 2018 at 6:09 PM, Ethan Dicks <ethan.dicks at gmail.com> wrote:
Now that I've poked around in the innards, I can say that this pinout
has a slight mistake in it. It should be:
1. GND
2. SERIAL OUTPUT (?9 V)
3. SERIAL INPUT
4. POWER IN +5 V
5. POWER IN +5 V
6. NC
7. GND
8. NC
9. NC
There are mentions here and there about how to hook up this dial box
using the +5V power jack and DE9 pins 2, 3, and 7. I can confirm from
direct examination that pin 7 is a ground and 8 is NC on the PCB (and
that 4 and 5 are connected directly to the center pin of the 2.1mm
power jack).
-ethan
SN-921 (2.1mm
barrel jack for +5V)
https://upload.wikimedia.org/wikipedia/commons/7/74/Sgi_dialbox_sn-921_fron…
http://yehar.com/blog/?p=3471
The (Seiko?) SN-921 can apparently be powered via DE9 or the 2.1mm
jack next to it...
1. GND
2. SERIAL OUTPUT (?9 V)
3. SERIAL INPUT
4. POWER IN +5 V
5. POWER IN +5 V
6. NC
7. NC
8. GND
9. NC 