KD8CEC Amateur Radio

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DVPi schematic final version

Posted: 17 Sep 2020 09:45 AM PDT
http://www.hamskey.com/2020/09/dvpi-...l-version.html

DVPi schematic final version
I know some nice PCBs are designed for DVPi. I also ordered 5 samples of
the PCB designed by EA7GIB and recently received it.
However, I had to add one LED and one switch to the needs of users. But
this is just an option. Add this feature only if you need it.
You must read the document below link before reading this document.
http://www.hamskey.com/2020/08/dvpi-...coder-and.html

This document is an extension of the document at the link above. Most of
the DVPi's hardware is explained in the link above.
This document describes only recently added hardware.


1.Schematic

2.Added Hardware
2.1 Added TX Led (transmission)
An LED has been added to indicate TX (transmission).
This can also be replaced by the PC817, just like the RX Led.
It can be used usefully when using the PTT button on touch screen or Vox
function .


2.2 Fun2 S/W
The final version of DVPi supports Dual VFO and D-Star.
Function 2 switch can be used in Dual VFO or mode change (DMR - D-Star)
according to user's selection.
GPIO_FUNC2_TYPE=1 : Function 2 switch is used to change VFO (Vfo A - Vfo
B)
GPIO_FUNC2_TYPE=0 : Function 2 switch is used to change Mode (DMR -
D-Star)





3.Conclusion
Again, DVPi can be used without any hardware. Just, if you need, you can
add any hardware you want as RX Led, rotary Encoder ...
Recently, the hose.brandmeister.network server went down. So, Talk group
information is not displayed in DVPi.
I'll wait a few more days and look for other ways before DVPi 1.0.
We can bring the Lastheard information from https://brandmeister.network/
but it will require quite a bit of network traffic.
Let's find a better way together.


Ian KD8CEC