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Jumper T8SG V2 plus transmitter

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28 Apr 2018 05:03 #68900 by dc59
Replied by dc59 on topic Jumper T8SG V2 plus transmitter

vlad_vy wrote: Will be better to find 5.0V source on T8SG V2 mainboard and connect DFPlayer Vcc to 5.0V.


norulers replied that there is no 5V power on board, only 3.3V , we need to add a 5V regulator ourselves .............

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29 Apr 2018 06:04 - 29 Apr 2018 06:06 #68914 by Moeder
Replied by Moeder on topic Jumper T8SG V2 plus transmitter
Last night I installed the dfplayer and a speaker I had lying around within half an hour. Everything is will prepared by Jumper as you can see from dc59s pictures, unfortunately you have to disassemble nearly the whole transmitter to solder the pins on the bottom of the pcb, but other than that I really like it. In a quick test there was no jitter using a 2s lipo, but I will further investigate on this issue.

@dc59: can we update the wiki with your pictures from this thread?
@vlad_vy: your t8sg_v2+ Build runs fine. I just can‘t notice any difference between contrast setting 7-10
Last edit: 29 Apr 2018 06:06 by Moeder. Reason: Contrast values

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29 Apr 2018 06:24 - 29 Apr 2018 06:29 #68915 by vlad_vy
Replied by vlad_vy on topic Jumper T8SG V2 plus transmitter
@Moeder: It's all I can to do with OLED contrast after several days dances with tambourine around T8SG V2 Plus. I even use quadratic function for contrast calculation and unusual Pre-Charge Period settings. It's almost impossible to get wide contrast setting for OLED screen.

In my case I can‘t notice any difference between contrast setting 8-10.
Last edit: 29 Apr 2018 06:29 by vlad_vy. Reason: Contrast values

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29 Apr 2018 08:35 #68917 by Moeder
Replied by Moeder on topic Jumper T8SG V2 plus transmitter
I'm trying to imagine you around the T8SG with a tambourine :silly: I wasn't criticizing, just noting my experience. Visibility is just fine with the OLED, so we can just keep things as they are.

Concerning the jitter, I can reproduce it with 4xAA alkaline batteries, although it is dependent on the audio volume setting - I don't experience jitter anymore when turning down volume, so it does seem somehow power consumption related. I use a 0.8 W 8 Ohm speaker. I do not have any buzz, but I opted for not using the PCB speaker routing, but instead directly connected the speaker to the DF player pins with a twisted wire pair.

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29 Apr 2018 08:41 #68918 by dc59
Replied by dc59 on topic Jumper T8SG V2 plus transmitter
@Moeder,

If anyone can help to update wiki with my pictures , it will be appreciated , My English is terrible :(

BTW, I got same result as vlad_vy , I can't find contrast difference between 8 to 10.

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29 Apr 2018 09:26 - 29 Apr 2018 09:28 #68919 by dc59
Replied by dc59 on topic Jumper T8SG V2 plus transmitter
@Moeder,

I have no luck :( , I connect speaker with twist wire to DFPlayer , but I still have buzz noise even if I changed volume to 1 ,
I installed 0.5W 8 Ohm speaker .

Attachments:
Last edit: 29 Apr 2018 09:28 by dc59.

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01 May 2018 01:05 #68943 by chrisab
Replied by chrisab on topic Jumper T8SG V2 plus transmitter
Anyone having issues with the Aux4 rotary switch not working on their T8SG V2 Plus. Ive played with the programming, ive opened it up to look or obvious damage and didnt see anything. Aux 5 works fine.

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01 May 2018 03:59 #68946 by ramunas
Replied by ramunas on topic Jumper T8SG V2 plus transmitter
@DC59- When you installed the twisted wire speaker connection, did you cut the connection of those 2 dfplayer pins to the main board? As I read Moeder's description it seems he totally avoided any connection of the speaker signals to the main board. That could explain the different buzz results.

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01 May 2018 05:32 #68948 by vlad_vy
Replied by vlad_vy on topic Jumper T8SG V2 plus transmitter

chrisab wrote: Anyone having issues with the Aux4 rotary switch not working on their T8SG V2 Plus. Ive played with the programming, ive opened it up to look or obvious damage and didnt see anything. Aux 5 works fine.


Try to calibrate sticks along with AUX4 and AUX5.

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01 May 2018 13:33 #68952 by dc59
Replied by dc59 on topic Jumper T8SG V2 plus transmitter

ramunas wrote: @DC59- When you installed the twisted wire speaker connection, did you cut the connection of those 2 dfplayer pins to the main board? As I read Moeder's description it seems he totally avoided any connection of the speaker signals to the main board. That could explain the different buzz results.


I didn't ....... :(
Thank you for notification, I will try to modify it again.

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01 May 2018 14:22 #68954 by chrisab
Replied by chrisab on topic Jumper T8SG V2 plus transmitter
That worked! Didn’t know I needed to calibrate the rotary switches. Thanks.

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03 May 2018 13:41 #68993 by dc59
Replied by dc59 on topic Jumper T8SG V2 plus transmitter
@ Moeder & @ramunas,

Thanks for your help!
I cut speaker pin between main board and DFPlayer , I got very clear voice now , no more buzz noise :)

Attachments:

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03 May 2018 14:43 #68997 by Moeder
Replied by Moeder on topic Jumper T8SG V2 plus transmitter
I didn't cut the or leave out those pins, but I'm glad it works for you now. BTW, do you also notice that timer alerts etc. Need a little more delay between playing the different voice files?

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04 May 2018 00:09 #69011 by dc59
Replied by dc59 on topic Jumper T8SG V2 plus transmitter

Moeder wrote: BTW, do you also notice that timer alerts etc. Need a little more delay between playing the different voice files?


No, I didn't , but will try to do some test on this. :)

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11 May 2018 18:55 #69182 by Kecske85
Replied by Kecske85 on topic Jumper T8SG V2 plus transmitter
So I tried installing a dfplayer module with direct connection to the speaker.
When using 1.2V rechargeable batteries or 1.5V alkaline batteries, only static comes out of it.
Using 2 cell lipo it played the clips but makes a loud screeching sound initially and later randomly.
Any ideas/suggestions? I did not solder the module in yet, but I don't think that should be a problem.

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12 May 2018 07:25 #69185 by Moeder
Replied by Moeder on topic Jumper T8SG V2 plus transmitter
Please post some picture of your temporary installation.

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12 May 2018 09:26 - 12 May 2018 09:26 #69186 by Kecske85
Replied by Kecske85 on topic Jumper T8SG V2 plus transmitter
I don't want to take the tx apart again, the screws are starting to strip, but here is a few pics of the dfplayer module.
I just slid it in to its slot when I was testing.
I did manage to mess up when ordering the speaker, it's a 28mm 8Ohm 1W speaker, could that be it?
Attachments:
Last edit: 12 May 2018 09:26 by Kecske85.

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12 May 2018 09:56 #69187 by Moeder
Replied by Moeder on topic Jumper T8SG V2 plus transmitter
I see a good possibility of your speaker taking too much current. Try . 3 or. 5 W Speaker

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12 May 2018 10:36 #69188 by Kecske85
Replied by Kecske85 on topic Jumper T8SG V2 plus transmitter
Cool, thanks, I'll try again when the new speaker arrives.

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13 Jun 2018 20:27 - 13 Jun 2018 20:27 #69633 by dddddd
Replied by dddddd on topic 2s lipo for Jumper T8SG V2 plus transmitter
Can someone please recommend a SPECIFIC 2s lipo that will fit the PLUS?
Have one on order that arrives in a few days...
I believe that I read that it should measure no larger than 90x30x15mm.
Is that correct? (still looking for a specific recommendation).
Will I need to get a battery connector as well, or is the on that is hooked up to the AA battery holder going to work (not hard wired).
Thanks
Last edit: 13 Jun 2018 20:27 by dddddd.

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