parallel port connectors
This tutorial is taken from the book MY EXPERIENCE IN PARALLEL PORT INTERFACING. you can download it free from the files section(file:-parallelport(3 files) of yahoo group-booksbybibin http://groups.yahoo.com/group/booksbybibin/ comments about this book on www.booksbybibin.blogspot.com CONNECTOR Different connectors are shown below.
But accordint to my experience I first used 1284B shown in below diagram with blue
tip is shown, but that does not worked properly before one year, but nowadays we are
getting such connectors and it works fine .I used the same 1284B connector with white
tip(tip means only color). See the my connector 2 years old, still working perfectly. I
have heard of 25 pin male on one side and 25 pin female on other side connector, but i
haven't worked on it. The connector is a normal printer cable which have 25 male pins
on one side and 36 female pins on the other side(circuit side). Better use a 25 – 36 pin
connector which is available commonly, costs around Rs.40 or less(cost of my
connector 2 years back).
Buying Connector:
See whether it have 25 male pins on one side and 36 female pins on other side. It is
normally called centronics connector available in every computer shop. Some people
say it as a printer connector while some others as data cable, so you see the connector
before you bring from the shop whether it is a DB25 connector.
Now let's see the different type of wires available. The following figure shows
diffferent wires. The black wires are very good to get inserted into the female pins of
the connctor. They will be held tight and they won't suffer any problems with loose
contact. But these black wires will enlarge the holes of the breadboard as well as the
cable. But you should use this wire to avoid the problem of soldering. If you can
solder the cable then it good. But soldering can cause some short circuits because you
had to solder atleast some 18 wires. If some short circuit occurs, sometimes you won't
be able to detect and it will eat your time , sometimes it can cause damage to the port
also. If you are good in soldering,then no problem. The green wires are medium type
wires which can be inserted to the holes of the connector and the breadboard. But the
contact won't be good. The black and white wires are the wires we use in breadboard
connection. See the thickness of the wires. If you use this wire to connect to the cable
to breadboard, then it will always get loose and create too much problem to you.
So better use the black wire. I think you got a confusion now. How 25 pins on one side
become 36 pin on other side???????. I got same, so I opened both sides of the
connector to see the inside connection. Then I drawed the inside connections with the
same color of the wires used inside for my cable. See the diagram below. Now you
should have got the problem solved. See data pins(8)+control pins(4)+status
pins(5)+ground(1)=18pins will be used by us. We will leave the remaining pins
unconnected.
MY EXPERIENCE WITH PARALLEL PORT CABLE:
If you are not getting data properly from port your connector
may or may not be bad. This problem occured to me when I am using a normal
connector ,IEEE1284 Type B connector. It is better to use a connector all the time
when you are taking output from port. I have seen many person using simple wire to
the port and taking output. That is a wrong practice. The connector I brought first can
be opened on both sides. I opened it and identified the colours of the wires connected
to the pins as show in figure above. That is not working properly and not getting
ouput properly. So I brought new one which cannot be opened on both sides.
The property of the holes in the second connector is
that if we insert a wire it is just fixed on the hole, so a small force applied on the wire
won't take the wire out. It is MALE to FEMALE connector and having a White colour
instead of Blue colour in IEEE1284B connector. It is IEEE1284B connector itself.
The following shows the Centronics pins on the other side of the cable(36 pin side)
1-co'
2-do
3-d1
4-d2
5-d3
6-d4
7-d5
8-d6
9-d7
10-s6
11-s7'
12-s5
13-s4
14-c1'
36-c3'
32-s3
31-c2
19-gnd
connect port ground to circuit ground. Then connect the data pins in the order in
bread board at one place.
This tutorial is taken from the book MY EXPERIENCE IN PARALLEL PORT INTERFACING. you can download it free from the files section(file:-parallelport(3 files) of yahoo group-booksbybibin http://groups.yahoo.com/group/booksbybibin/ comments about this book on www.booksbybibin.blogspot.com CONNECTOR Different connectors are shown below.
But accordint to my experience I first used 1284B shown in below diagram with blue
tip is shown, but that does not worked properly before one year, but nowadays we are
getting such connectors and it works fine .I used the same 1284B connector with white
tip(tip means only color). See the my connector 2 years old, still working perfectly. I
have heard of 25 pin male on one side and 25 pin female on other side connector, but i
haven't worked on it. The connector is a normal printer cable which have 25 male pins
on one side and 36 female pins on the other side(circuit side). Better use a 25 – 36 pin
connector which is available commonly, costs around Rs.40 or less(cost of my
connector 2 years back).
Buying Connector:
See whether it have 25 male pins on one side and 36 female pins on other side. It is
normally called centronics connector available in every computer shop. Some people
say it as a printer connector while some others as data cable, so you see the connector
before you bring from the shop whether it is a DB25 connector.
Now let's see the different type of wires available. The following figure shows
diffferent wires. The black wires are very good to get inserted into the female pins of
the connctor. They will be held tight and they won't suffer any problems with loose
contact. But these black wires will enlarge the holes of the breadboard as well as the
cable. But you should use this wire to avoid the problem of soldering. If you can
solder the cable then it good. But soldering can cause some short circuits because you
had to solder atleast some 18 wires. If some short circuit occurs, sometimes you won't
be able to detect and it will eat your time , sometimes it can cause damage to the port
also. If you are good in soldering,then no problem. The green wires are medium type
wires which can be inserted to the holes of the connector and the breadboard. But the
contact won't be good. The black and white wires are the wires we use in breadboard
connection. See the thickness of the wires. If you use this wire to connect to the cable
to breadboard, then it will always get loose and create too much problem to you.
So better use the black wire. I think you got a confusion now. How 25 pins on one side
become 36 pin on other side???????. I got same, so I opened both sides of the
connector to see the inside connection. Then I drawed the inside connections with the
same color of the wires used inside for my cable. See the diagram below. Now you
should have got the problem solved. See data pins(8)+control pins(4)+status
pins(5)+ground(1)=18pins will be used by us. We will leave the remaining pins
unconnected.
MY EXPERIENCE WITH PARALLEL PORT CABLE:
If you are not getting data properly from port your connector
may or may not be bad. This problem occured to me when I am using a normal
connector ,IEEE1284 Type B connector. It is better to use a connector all the time
when you are taking output from port. I have seen many person using simple wire to
the port and taking output. That is a wrong practice. The connector I brought first can
be opened on both sides. I opened it and identified the colours of the wires connected
to the pins as show in figure above. That is not working properly and not getting
ouput properly. So I brought new one which cannot be opened on both sides.
The property of the holes in the second connector is
that if we insert a wire it is just fixed on the hole, so a small force applied on the wire
won't take the wire out. It is MALE to FEMALE connector and having a White colour
instead of Blue colour in IEEE1284B connector. It is IEEE1284B connector itself.
The following shows the Centronics pins on the other side of the cable(36 pin side)
1-co'
2-do
3-d1
4-d2
5-d3
6-d4
7-d5
8-d6
9-d7
10-s6
11-s7'
12-s5
13-s4
14-c1'
36-c3'
32-s3
31-c2
19-gnd
connect port ground to circuit ground. Then connect the data pins in the order in
bread board at one place.