Charger mods and Pi Zero W HotSpot modifcation

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IK8JHL
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Charger mods and Pi Zero W HotSpot modifcation

Post by IK8JHL » Sun Feb 09, 2020 5:03 pm

I made my HS OpenGD77 by modifying the charging base to be able to insert the PiZero W directly inside it. To do this I had to replace the original charging circuit with a TP5100, add an LM2596 module to stabilize the voltage at 5V to power the Pi0, change a USB cable. Obviously or replace the original power supply with a 2A one.
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YT5HOK
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Re: Cherger mods and Pi-zero HotSpot modifcation

Post by YT5HOK » Sun Feb 09, 2020 5:08 pm

Very nice! But watch for temperature, even Pi 0 runs very hot when in closed plastic case.
Marko

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m1dyp
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Re: Cherger mods and Pi-zero HotSpot modifcation

Post by m1dyp » Sun Feb 09, 2020 5:10 pm

nice one
73 de Ken :D

IK8JHL
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Re: Charger mods and Pi Zero W HotSpot modifcation

Post by IK8JHL » Sun Feb 09, 2020 6:02 pm

YT5HOK wrote:
Sun Feb 09, 2020 5:08 pm
Very nice! But watch for temperature, even Pi 0 runs very hot when in closed plastic case.
For now about few hours its stable , if necessary i can create some hole
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IK8JHL
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Re: Charger mods and Pi Zero W HotSpot modifcation

Post by IK8JHL » Tue Feb 11, 2020 9:06 am

IK8JHL wrote:
Sun Feb 09, 2020 5:03 pm
I made my HS OpenGD77 by modifying the charging base to be able to insert the PiZero directly inside it. To do this I had to replace the original charging circuit with a TP5100, add an LM2596 module to stabilize the voltage at 5V to power the Pi0, change a USB cable. Obviously or replace the original power supply with a 2A one.

IK8JHL
Posts: 108
Joined: Tue Dec 10, 2019 11:19 am

Re: Charger mods and Pi Zero W HotSpot modifcation

Post by IK8JHL » Wed Feb 12, 2020 11:56 am

Another littele mods, reverse direction of USB cable
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AB6RF
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Re: Charger mods and Pi Zero W HotSpot modifcation

Post by AB6RF » Wed Oct 14, 2020 4:17 am

Here's another pictorial of a GD-77 based hotspot.
I made a somewhat shielded connector for the USB cable, so far the setup seems stable at 500mW using the rubber ducky antenna.
I'll leave it there for few days before I try higher power settings.

Wonder mine doesn't show the IP address on the GD-77 display....

Ab6RF

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F1RMB
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Re: Charger mods and Pi Zero W HotSpot modifcation

Post by F1RMB » Wed Oct 14, 2020 6:11 am

Hi,

To see the IP address, you need to use the CAST display driver on the Pi-Star (MMDVMHost)
  • Using the official Pi-Star
    from expert mode, edit the mmdvmhost configuration file, and set Display to CAST, in [General] section
  • Using my fork
    in the configuration page, in MMDVMHost configuration panel, select the display driver in the MMDVM Display Type drop down list

Cheers.
---
Daniel
73 de Daniel.

AB6RF
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Re: Charger mods and Pi Zero W HotSpot modifcation

Post by AB6RF » Wed Oct 14, 2020 6:52 am

Thanks Daniel. I didn’t know about that setting.
For posterity, the setting in pi-star is at:
Configuration/Expert/MMDVMHost/General Display=CAST (note that “CAST” is in all caps)

AB6RF

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