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Re: Modificação do carregador Radioditty com cartão "TP5100" a US$ 2.
Posted: Fri Aug 13, 2021 6:37 pm
by PU4BLA
m1dyp wrote: ↑Wed Jan 29, 2020 10:22 pm
então...... deveria ser assim?
O diodo está em curto para AC ele deve ficar em série não em paralelo com a entrada !
Re: Modificação do carregador Radioditty com cartão "TP5100" a US$ 2.
Posted: Mon Aug 16, 2021 2:12 am
by VK3KYY
Gustavo G Carlo wrote: ↑Fri Aug 13, 2021 6:37 pm
m1dyp wrote: ↑Wed Jan 29, 2020 10:22 pm
então...... deveria ser assim?
O diodo está em curto para AC ele deve ficar em série não em paralelo com a entrada !
"The diode is shorted to AC it must be in series not parallel with the input! "
(LOL)
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Mon Nov 28, 2022 8:06 am
by iz2qdh
Hi all and thanks for sharing this modification.
I've read all the thread, i'm gonna buy some TP5100s from Aliexpress and all the parts but i still have 2 questions:
1. what is the "correct" position for the diode? I've seen in the last schematics that it has to be in parallel with the coil, correct?
2. i use the GD-77 as a DMR scanner. After i modify the charger can i leave it plugged in the charger and turned on without wearing out or damaging the battery?
Thanks 73
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Mon Nov 28, 2022 9:59 am
by VK3KYY
iz2qdh wrote: ↑Mon Nov 28, 2022 8:06 am
Hi all and thanks for sharing this modification.
I've read all the thread, i'm gonna buy some TP5100s from Aliexpress and all the parts but i still have 2 questions:
1. what is the "correct" position for the diode? I've seen in the last schematics that it has to be in parallel with the coil, correct?
2. i use the GD-77 as a DMR scanner. After i modify the charger can i leave it plugged in the charger and turned on without wearing out or damaging the battery?
Thanks 73
1. IMO the diode and coil is not 100% necessary, many people just use the TP5100 with no additional components
2. Probably constantly connecting the battery to the charger is not ideal, but it is not easy to find a battery eliminator for the GD77, so many people leave the radio in the charger.
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Mon Nov 28, 2022 12:18 pm
by iz2qdh
VK3KYY wrote: ↑Mon Nov 28, 2022 9:59 am
1. IMO the diode and coil is not 100% necessary, many people just use the TP5100 with no additional components
2. Probably constantly connecting the battery to the charger is not ideal, but it is not easy to find a battery eliminator for the GD77, so many people leave the radio in the charger.
1. Ok, when i'll have all the parts needed i'll decide what to do
2. I prefer to charge the battery rather than leaving it in the charger
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Sat Dec 17, 2022 10:04 am
by iz2qdh
I made it!
After some time and some italian blasphemities i've managed to install the TP-5100 and make it work at first try.
I've noticed that the LED does not shine so bright...
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Tue Apr 02, 2024 6:04 pm
by OZ1FTG
Brilliant mod , i have just ordered some TPS5100 boards from Ali...
But I have a question about TPS5100 charge current, and am not an EE.
Wasn't the original charger set for 500mA ?
Has anyone making this "mod", had issues with the batteries getting
hot/bad while charging ?
As i see it here (Pict)
viewtopic.php?f=8&t=564&start=30#p4884
It seems like
that board came setup for 2A charge current, as there initially were two prarallel 0.1 ohm resisters (value R100 = 0.1 ohm)
By removing one, the charge current would be 1A.
DG1YFX mentioned the resistors should be in series for 500mA charge current, in the pict here..
viewtopic.php?f=8&t=564&start=10#p4794
But then again if no one has had any issues with the 1A charge current i'll gladly take the shorter charge time.
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Tue Apr 02, 2024 8:39 pm
by VK3KYY
OZ1FTG wrote: ↑Tue Apr 02, 2024 6:04 pm
Brilliant mod , i have just ordered some TPS5100 boards from Ali...
But I have a question about TPS5100 charge current, and am not an EE.
Wasn't the original charger set for 500mA ?
Has anyone making this "mod", had issues with the batteries getting
hot/bad while charging ?
As i see it here (Pict)
viewtopic.php?f=8&t=564&start=30#p4884
It seems like
that board came setup for 2A charge current, as there initially were two prarallel 0.1 ohm resisters (value R100 = 0.1 ohm)
By removing one, the charge current would be 1A.
DG1YFX mentioned the resistors should be in series for 500mA charge current, in the pict here..
viewtopic.php?f=8&t=564&start=10#p4794
But then again if no one has had any issues with the 1A charge current i'll gladly take the shorter charge time.
The batteries are more than 2000mAH in most radios, so charging at 1A will still take 2 to 3 hours, and IMO would not be a problem.
Even 2A would be OK for a 2500mAH Battery.
I don't think many people change the default charge rate on these modules.
I didn't....
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Wed Apr 03, 2024 12:49 pm
by OZ1FTG
VK3KYY wrote: ↑Tue Apr 02, 2024 8:39 pm
The batteries are more than 2000mAH in most radios, so charging at 1A will still take 2 to 3 hours, and IMO would not be a problem.
Even 2A would be OK for a 2500mAH Battery.
I don't think many people change the default charge rate on these modules.
I didn't....
Thnx for the answer
Did you remove one of the resitors for 1A charge current , or are you charging w. 2A ?
Re: Modification of the Radioditty charger with "TP5100" card at $ 2.
Posted: Wed Apr 03, 2024 1:40 pm
by F1RMB
I personnaly charge @ 1A (removed 1 resistor, as you can see in that thread), for years.
Cheers.
---
Daniel