¿ªÔÆÌåÓý

  1. BITX20
  2. Topics

uBITX Display Separation Cable

 

While waiting for my uBITX, I decided to try to come up with a way of mounting the main circuit board at the rear of a metal case so I could use the rear panel as a heatsink for the two IRF510's (with insulating hardware).?
The raduino must remain plugged directly into the main circuit board, so the only way to move the LCD display forward if required is to make up a display separation cable.
I found that a discarded computer IDE cable does the job. See the details here:
?

 

The BITX, whether u or not, can benefit from this :) . Makes for more case and panel options.
73 de ZL2DEX
 

Great idea Al !?

I think it will be much easier to mount things with the display?
physically separated from the main board.

Cheers

Michael VE3WMB?

P.S. I am doing the happy dance as my order made the cutoff for the first batch of uBITX?
kits.?
John McFadden
 

¿ªÔÆÌåÓý

Or buy a pack of male-to-female jumper wires labeled for Arduino use (to make sure you get the right header pitch and pin size) and tear off only the 16 you need.

My pack of 120 (40 male/male, 40 male/female, 40 female/female) cost $10 on Amazon for ~6" long and have been very useful while soldering up other connections for mods.

John


On 12/13/2017 7:34 PM, Michael Babineau wrote:

Great idea Al !?

I think it will be much easier to mount things with the display?
physically separated from the main board.

Cheers

Michael VE3WMB?

P.S. I am doing the happy dance as my order made the cutoff for the first batch of uBITX?
kits.?

 

Is the display missing a couple of digits?
 

the picture is for demo only. Notice the arduino board in behind is not connected to anything but the display. I suspect Al is using the default firmware for display purposes only so missing all the software mods. This method is basically plug n play - no soldering or rework. I like easy!?
If you want to melt some solder then flip the LM7805 5V regulator to the back side so a heatsink can be easily added. Runs alot cooler now.
 

¿ªÔÆÌåÓý

Hi all,

just ordering these to remote my display -?

Adafruit Premium Female/Female Jumper Wires - 20 x 6 (150mm)

?


73 VK2VOL


On 14 Dec 2017, at 9:10 am, Al Duncan VE3RRD <ve3rrd@...> wrote:

While waiting for my uBITX, I decided to try to come up with a way of mounting the main circuit board at the rear of a metal case so I could use the rear panel as a heatsink for the two IRF510's (with insulating hardware).?
The raduino must remain plugged directly into the main circuit board, so the only way to move the LCD display forward if required is to make up a display separation cable.
I found that a discarded computer IDE cable does the job. See the details here:
?
<it works.jpg>

M Garza
 

Hi John,
You will need male/female jumpers...

73

Marco - KG5PRT



On Thu, Jan 11, 2018 at 1:20 AM, John Sharpe <johsharpe@...> wrote:
Hi all,

just ordering these to remote my display -?

Adafruit Premium Female/Female Jumper Wires - 20 x 6 (150mm)

?


73 VK2VOL


On 14 Dec 2017, at 9:10 am, Al Duncan VE3RRD <ve3rrd@...> wrote:

While waiting for my uBITX, I decided to try to come up with a way of mounting the main circuit board at the rear of a metal case so I could use the rear panel as a heatsink for the two IRF510's (with insulating hardware).?
The raduino must remain plugged directly into the main circuit board, so the only way to move the LCD display forward if required is to make up a display separation cable.
I found that a discarded computer IDE cable does the job. See the details here:
?
<it works.jpg>


 

John, if you have Jaycar nearby (VK's only) they have? them, plus plug to socket etc.

glenn
vk33pe
 

¿ªÔÆÌåÓý

Phew, I just checked - i ordered the correct ones but posted the wrong link!

john


On 11 Jan 2018, at 6:24 pm, M Garza <mgarza896@...> wrote:

Hi John,
You will need male/female jumpers...

73

Marco - KG5PRT



On Thu, Jan 11, 2018 at 1:20 AM, John Sharpe <johsharpe@...> wrote:
Hi all,

just ordering these to remote my display -?

Adafruit Premium Female/Female Jumper Wires - 20 x 6 (150mm)

?


73 VK2VOL


On 14 Dec 2017, at 9:10 am, Al Duncan VE3RRD <ve3rrd@...> wrote:

While waiting for my uBITX, I decided to try to come up with a way of mounting the main circuit board at the rear of a metal case so I could use the rear panel as a heatsink for the two IRF510's (with insulating hardware).?
The raduino must remain plugged directly into the main circuit board, so the only way to move the LCD display forward if required is to make up a display separation cable.
I found that a discarded computer IDE cable does the job. See the details here:
?
<it works.jpg>






 

¿ªÔÆÌåÓý

Thanks Glenn?

john



On 11 Jan 2018, at 7:41 pm, Glenn <glennp@...> wrote:

John, if you have Jaycar nearby (VK's only) they have? them, plus plug to socket etc.

glenn
vk33pe

 

Do you have an Amazon link you can post? Tnx,
--
John AE5X

?
 

John, don'u feel that that short extension cable radiates pulse noise from the d4 to d7 and other 2 wires?

sarma
?vu3zmv


Regards
MVS Sarma
?

On Thu, Jan 11, 2018 at 5:30 PM, John AE5X <ae5x@...> wrote:
Do you have an Amazon link you can post? Tnx,
--
John AE5X

?
chris gress
 

Could you cover the wires with copper foil and ground the foil chris

On 11 Jan 2018 13:56, "Mvs Sarma" <mvssarma@...> wrote:
John, don'u feel that that short extension cable radiates pulse noise from the d4 to d7 and other 2 wires?

sarma
?vu3zmv


Regards
MVS Sarma
?

On Thu, Jan 11, 2018 at 5:30 PM, John AE5X <ae5x@...> wrote:
Do you have an Amazon link you can post? Tnx,
--
John AE5X

?
chris gress
 

I got this on amazon very cheep from China looks good wire ?1,59p UK price?
Copper foil in the UK ?1,99p from b&m?

On 11 Jan 2018 14:33, "chris gress" <Chrisg0wfh@...> wrote:
Could you cover the wires with copper foil and ground the foil chris

On 11 Jan 2018 13:56, "Mvs Sarma" <mvssarma@...> wrote:
John, don'u feel that that short extension cable radiates pulse noise from the d4 to d7 and other 2 wires?

sarma
?vu3zmv


Regards
MVS Sarma
?

On Thu, Jan 11, 2018 at 5:30 PM, John AE5X <ae5x@...> wrote:
Do you have an Amazon link you can post? Tnx,
--
John AE5X

?


IMG_20180111_124602.jpg
IMG_20180111_143804.jpg
IMG_20180111_143823.jpg

Jack Purdum
 

You can find those on eBay under DuPont Jumpers. They come in M-M, M-F, and F-F. Some have plastic guards that come off pretty easily.

Jack, W8TEE


From: chris gress <Chrisg0wfh@...>
To: [email protected]
Sent: Thursday, January 11, 2018 9:40 AM
Subject: Re: [BITX20] uBITX Display Separation Cable

I got this on amazon very cheep from China looks good wire ?1,59p UK price?
Copper foil in the UK ?1,99p from b&m?

On 11 Jan 2018 14:33, "chris gress" <Chrisg0wfh@...> wrote:
Could you cover the wires with copper foil and ground the foil chris

On 11 Jan 2018 13:56, "Mvs Sarma" <mvssarma@...> wrote:
John, don'u feel that that short extension cable radiates pulse noise from the d4 to d7 and other 2 wires?

sarma
?vu3zmv


Regards
MVS Sarma
?

On Thu, Jan 11, 2018 at 5:30 PM, John AE5X <ae5x@...> wrote:
Do you have an Amazon link you can post? Tnx,
--
John AE5X
?




Virus-free.

 

In fact you could use regular aluminum foil for this. ??

A few weeks ago I watched a documentary on the Voyager Space probes
and they interviewed the JPL scientists that worked on developing them. One of them told a story of how just before a few short weeks
before the probes were?supposed to be ready, they came to realize that environment around Jupiter was very RF-hostile
and they had neglected to shield?all of the cables running from the body of the probes out along the booms to the instruments.
With only two weeks left, they??raided all of the local grocery stores for AL foil, cleaned it with pure alcohol, cut it into uniform strips and wrapped?it around all of the external sensor cables to shield them. ?Obviously it worked just fine. ;-) ?

Cheers

Michael VE3WMB?
 

I had a couple of spare 8 pin connectors from my Bitx40 that I used for the separation then soldered the other end to a male header and my uBitx is happy.

Bob
N1ETS

IMG_20180111_111356.jpg

James Lynes
 

Great documentary. See Netflix.

James
 

Using old IDE cables is a very good idea.

Note that there are many types of cable available, but most of them will be either
40 wire or 80 wire cables. the difference in the newer (ATA) 80 wire cables is that
every other wire is used to separate and shield the signal wires. All 40 ground wires
will be connected either to the even side or the odd side of the connector, 2 adjacent
wires to each pin.

In the older cables, there is no ground wire; each signal is routed through each of the
40 pins. It will work, but provides no shielding. Note also that he signal path in the
ATA cables has been cut from 40 to 20 wires. That will make little difference to a
lcd connection. The electronic difference is in the interface port.

It is a good idea to use the 80 wire cable and determine which side is ground, and then
connect that side to ground. That will provide shielding for the signal wires and will
cut down on RFI considerably.

Note that these connectors have 2 rows of 20 pins each. You will be connecting 16
pins for a 16x2 display. Usually, also, these connectors have a center connector for
another drive. Cut the cable so that the shortest of the two connectors are at the ends
of it. Note also that the result will usually be a cable with 2 female connectors, so
that you will have to make a sort of adapter to provide the normal M-F ends.

I don't know if all of this information is exactly correct, but I do know that they work very well.

john
AD5YE

1 - 20 of 20