OLED Display

9a6cw
 

Posts: 5
Joined: 01 May 2022, 11:52

OLED Display

Post by 9a6cw »

73 !

Thanks to everyone who participated in this device.
I made it successfully (tr)uSDX and made several SOTA activations already.Works great !
But this OLED type is absolutely not readable on field operation .. not even in the shadows in my region.
I made also devices with similar display. dmr-hotspot or ATU-100 tuner and theirs is 3X times brighter.

Is there another model ?

Thanks in advance
Faraaz VK4JJ
 

Posts: 215
Joined: 30 Dec 2021, 21:56

Re: OLED Display

Post by Faraaz VK4JJ »

9a6cw wrote: 01 May 2022, 12:13 73 !

Thanks to everyone who participated in this device.
I made it successfully (tr)uSDX and made several SOTA activations already.Works great !
But this OLED type is absolutely not readable on field operation .. not even in the shadows in my region.
I made also devices with similar display. dmr-hotspot or ATU-100 tuner and theirs is 3X times brighter.

Is there another model ?

Thanks in advance
Hi, there is not.
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

Hi,

There is a solution (I've been working on this on and off for a while). Use a 78L08 off of 12V at the interboard connector of the main board. Put a 0.1uF on the output. Connect the 8V output of the 78L08 to C6 of the OLED instead of the wire from OLED Q1 (or U1 as some are labeled). Done.

73,

Robert, WA2T
9a6cw
 

Posts: 5
Joined: 01 May 2022, 11:52

Re: OLED Display

Post by 9a6cw »

Thanks Robert

I was thinking about that solution

73
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

Et Voila!

In the picture, you can also see my fly wire fix for the other type encoder with the outputs reversed.

Incidentally, I decided on 8V because the charge pump measured 7.65V on multiple OLED's.

Also, you can see my nifty removable OLED setup.

73,

Robert, WA2T
Attachments
8Vs.jpg
8Vs.jpg (190.38 KiB) Viewed 3607 times
9a6cw
 

Posts: 5
Joined: 01 May 2022, 11:52

Re: OLED Display

Post by 9a6cw »

Nice solution !! thanks
DL2MAN
 

Posts: 489
Joined: 30 Dec 2021, 19:18
Contact:

Re: OLED Display

Post by DL2MAN »

wa2t wrote: 01 May 2022, 13:19 Hi,

There is a solution (I've been working on this on and off for a while). Use a 78L08 off of 12V at the interboard connector of the main board. Put a 0.1uF on the output. Connect the 8V output of the 78L08 to C6 of the OLED instead of the wire from OLED Q1 (or U1 as some are labeled). Done.

73,

Robert, WA2T
Hi Robert,

does it make the display better readable / brighter ? Is it worth recommending this mod to people asking/complaining about display readability outdoors ? Do you maybe even happen to have side by side comparison photos?

73 Manuel; DL2MAN
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

DL2MAN wrote: 02 May 2022, 08:23
wa2t wrote: 01 May 2022, 13:19 Hi,

There is a solution (I've been working on this on and off for a while). Use a 78L08 off of 12V at the interboard connector of the main board. Put a 0.1uF on the output. Connect the 8V output of the 78L08 to C6 of the OLED instead of the wire from OLED Q1 (or U1 as some are labeled). Done.

73,

Robert, WA2T
Hi Robert,

does it make the display better readable / brighter ? Is it worth recommending this mod to people asking/complaining about display readability outdoors ? Do you maybe even happen to have side by side comparison photos?

73 Manuel; DL2MAN
Hi Manuel,

Definitely brighter, not sure about outdoor readability but can check into it, I can take a photo of side by side with same display with 5V mod and 8V (this) mod and post.

73,

Robert, WA2T
kinggreene
 

Posts: 2
Joined: 02 May 2022, 19:07

Re: OLED Display

Post by kinggreene »

There is another display, kind of, it's a white oled that just consists of the screen with the 30 pin ribbon, I'm thinking of getting one and solder it to a "donor board" it's black text on a white background. It's on digikey
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

wa2t wrote: 02 May 2022, 14:54 ...photo of side by side with same display with 5V mod and 8V (this) mod...
Here you go:
Blue OLED Comp s.jpg
Blue OLED Comp s.jpg (248.25 KiB) Viewed 3468 times
OLED powered by 8V is same brightness as using internal charge pump (but of course without the noise).

73,

Robert, WA2T
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

Tried both 5V and 8V OLED display power in direct sunlight. Result: 5V unreadable. 8V better, but barely readable. These displays are not going to work in direct sunlight unless there are some that are very bright (and then use the 8V mod).

Still a worthwhile mod IMO, and my personal units will have it.

73,

Robert, WA2T
9a6cw
 

Posts: 5
Joined: 01 May 2022, 11:52

Re: OLED Display

Post by 9a6cw »

Thanks for info and picture Robert, I ordered yellow and white display for test...
Of course we are not talking about direct sunlight...
and in most activations I look for any shade..
this small modification might help.

Ivica 9a6cw
9a5yy
 

Posts: 21
Joined: 03 Jan 2022, 22:16

Re: OLED Display

Post by 9a5yy »

Robert, thanks for mod information and picture. I will try mod too and let you know about the results at SOTA activation.

73 de Neven, 9A5YY
Ohwenzelph
 

Posts: 134
Joined: 01 Jan 2022, 03:47

Re: OLED Display

Post by Ohwenzelph »

Will the display still work when powered just thru the USB connector?
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

Ohwenzelph wrote: 04 May 2022, 15:34 Will the display still work when powered just thru the USB connector?
Hi,

I was just about to post about that very thing! No, the only drawback to my mod is that powering the transceiver by USB will no longer power the OLED display. Until now, that is! The solution for that is a 1N4148. Anode to the 5V line (OLED Q1/U2) and Cathode to C6 - same place the flywire goes for the 8V mod connection. OLED works fine on 5V (now). You could even use a leaded 1N4148 with insulation added to the leads.

So the recommended mod for running the OLED display on 5V, except with a diode in the line to block 8V from 5V when running on 12V, and the 8V mod I previously described.

Here's a picture:
8V and 5V USB s.jpg
8V and 5V USB s.jpg (243.16 KiB) Viewed 3317 times
73,

Robert, WA2T
DL2MAN
 

Posts: 489
Joined: 30 Dec 2021, 19:18
Contact:

Re: OLED Display

Post by DL2MAN »

Great, Robert ! Thanks. I have linked it in the "Known Solutions" Thread in the Troubleshooting Section !
73 Manuel; DL2MAN
Murphyv310
 

Posts: 40
Joined: 18 Apr 2022, 19:33

Re: OLED Display

Post by Murphyv310 »

Nice mod that I'll do to mine.
Instead of a 1N4148 I'd be inclined to use a Schottky diode that has a lower forward voltage drop than a silicon variety. Using USB there would be less loss of brilliance due to loosing 0.6 to 0.7v in compassion to 0.15 to 0.22v with the Schottky.
Regards, Trevor. 2M0GZQ
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

Murphyv310 wrote: 05 May 2022, 16:46 Nice mod that I'll do to mine.
Instead of a 1N4148 I'd be inclined to use a Schottky diode that has a lower forward voltage drop than a silicon variety. Using USB there would be less loss of brilliance due to loosing 0.6 to 0.7v in compassion to 0.15 to 0.22v with the Schottky.
Sure, a Schottky diode will be even better. Although I doubt it will make the display much brighter when running on USB power, less drop/higher display voltage is good.
W3SI
 

Posts: 23
Joined: 06 Feb 2022, 08:28
Location: Edgewater, FL

Re: OLED Display

Post by W3SI »

wa2t wrote: 01 May 2022, 17:10 Et Voila!

In the picture, you can also see my fly wire fix for the other type encoder with the outputs reversed.

Incidentally, I decided on 8V because the charge pump measured 7.65V on multiple OLED's.

Also, you can see my nifty removable OLED setup.

73,

Robert, WA2T
Robert,
What did you do to the pin socket to get it to fit together? Did you trim the pins on OLED and also cut the top of the socket down? If so what did you use to cut the socket?
I am about to experiment with different OLED and e-paper screens to get the best clarity in sunlight conditions.
Thanks in advance.
Bill - W3SI
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

Hi Bill,

I removed the pins from the OLED (some come with the header unsoldered) and put the long ends in through the top side (into the female header sockets), trimmed them, and soldered. The socket is 3.5mm header, same as I used for the inter-board connector, cut to size and the end filed smooth. The bottom corners are same deal but with a single header and socket pin each. It's a bit of a trick to get the header properly centered in those big holes, easy to burn fingers, but perseverance will get the job done!

Do keep us posted on your alternative display investigations.

73,

Robert, WA2T
W3SI
 

Posts: 23
Joined: 06 Feb 2022, 08:28
Location: Edgewater, FL

Re: OLED Display

Post by W3SI »

wa2t wrote: 12 May 2022, 21:41 Hi Bill,

The socket is 3.5mm header, same as I used for the inter-board connector, cut to size and the end filed smooth.

Do keep us posted on your alternative display investigations.

73,

Robert, WA2T
Thanks Robert,
Now to find some 3.5mm headers!

I have 2 of these radios and a third Main board on the way from Up Tech Store.

I will keep posted about the display mods that work and the ones that don't. I don't spend a lot of time experimenting but I spend a lot of time in the shop.

Bill - W3SI
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

9a6cw
 

Posts: 5
Joined: 01 May 2022, 11:52

Re: OLED Display

Post by 9a6cw »

73
a small change is worth the effort...
Here is picture of my modification.
78L08 and 78M08 has diferent polarity !!
WhatsApp Image 2022-05-26 at 6.14.18 PM.jpeg
WhatsApp Image 2022-05-26 at 6.14.18 PM.jpeg (156.43 KiB) Viewed 2670 times
WhatsApp Image 2022-05-26 at 6.14.17 PM.jpeg
WhatsApp Image 2022-05-26 at 6.14.17 PM.jpeg (148.15 KiB) Viewed 2670 times
WhatsApp Image 2022-05-26 at 6.14.18 PM 2.jpeg
WhatsApp Image 2022-05-26 at 6.14.18 PM 2.jpeg (96.57 KiB) Viewed 2670 times
73 and only QRO ;) !

Ivica
JohnK1JD
 

Posts: 12
Joined: 27 Apr 2022, 12:54

Re: OLED Display

Post by JohnK1JD »

wa2t wrote: 01 May 2022, 13:19 Hi,

There is a solution (I've been working on this on and off for a while). Use a 78L08 off of 12V at the interboard connector of the main board. Put a 0.1uF on the output. Connect the 8V output of the 78L08 to C6 of the OLED instead of the wire from OLED Q1 (or U1 as some are labeled). Done.

73,

Robert, WA2T
Robert,
I've got the OLED board unsoldered from mainboard v1.0. How did you secure the 78L08 and capacitor to the mainboard?

Thanks,
John K1JD
wa2t
 

Posts: 180
Joined: 01 Jan 2022, 16:30

Re: OLED Display

Post by wa2t »

JohnK1JD wrote: 29 May 2022, 13:48
wa2t wrote: 01 May 2022, 13:19 Hi,

There is a solution (I've been working on this on and off for a while). Use a 78L08 off of 12V at the interboard connector of the main board. Put a 0.1uF on the output. Connect the 8V output of the 78L08 to C6 of the OLED instead of the wire from OLED Q1 (or U1 as some are labeled). Done.

73,

Robert, WA2T
Robert,
I've got the OLED board unsoldered from mainboard v1.0. How did you secure the 78L08 and capacitor to the mainboard?

Thanks,
John K1JD
Hi John,

Scrape away solder mask in appropriate places to make ground contact and do not scrape in other places where ground contact is not needed/wanted. Solder down parts, etc.

73,

Robert, WA2T
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