Modification of the Radioditty charger with "TP5100" card at $ 2.

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PU4BLA
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Re: Modificação do carregador Radioditty com cartão "TP5100" a US$ 2.

Post by PU4BLA » 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 !

VK3KYY
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Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: Modificação do carregador Radioditty com cartão "TP5100" a US$ 2.

Post by VK3KYY » Mon Aug 16, 2021 2:12 am

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)

iz2qdh
Posts: 9
Joined: Wed Jun 08, 2022 4:12 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by iz2qdh » 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

VK3KYY
Posts: 7478
Joined: Sat Nov 16, 2019 3:25 am
Location: Melbourne, Australia

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by VK3KYY » Mon Nov 28, 2022 9:59 am

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.

iz2qdh
Posts: 9
Joined: Wed Jun 08, 2022 4:12 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by iz2qdh » Mon Nov 28, 2022 12:18 pm

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

iz2qdh
Posts: 9
Joined: Wed Jun 08, 2022 4:12 pm

Re: Modification of the Radioditty charger with "TP5100" card at $ 2.

Post by iz2qdh » Sat Dec 17, 2022 10:04 am

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...

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