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Releases: mathisschmieder/MMDVM_HS_Hat

Revision 1.6

28 Mar 18:27
@phl0 phl0
rev1.6
e5efaed
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phl0 Florian (DF2ET)
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Revision 1.6 Latest
Latest
  • Added fiducials
  • Added a pick-and-place file
  • Swapped RX/TX Pins on NXT header
  • Added MMDVM Logo
  • Swapped D-Star and DMR LED
  • Added optional L6 for VHF operation
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Revision 1.5

28 Mar 18:23
@phl0 phl0
rev1.5
929ceb2
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Revision 1.5

Added sources for a 3D printed case
Added a fifth mode LED for NXDN

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Revision 1.4

13 Nov 15:40
@phl0 phl0
rev1.4
8befed3
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phl0 Florian (DF2ET)
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Revision 1.4

The SVC LED has been rotated and thus aligned to the layout of all other LEDs. The RainSun ceramic antenna has been replaced by a model that can be ordered at Mouser. DC line filtering has been added to 3v3 line.

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Revision 1.3

10 Nov 09:22
@phl0 phl0
rev1.3
9900a2c
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Revision 1.3

The boot jumper was removed and the STlink header moved to its position. This gave space for another 4-pin header allowing to connect I²C OLED displays. No new stencil needed

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Revision 1.2

31 Oct 19:33
@phl0 phl0
rev1.2
75bb39b
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Revision 1.2

This Revision adds support for an optional AN1603-443 ceramic antenna. Insert C27 or C28, depending on what kind of antenna you want to use.

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Revision 1.1

31 Oct 19:31
@phl0 phl0
rev1.1
23d9586
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Revision 1.1

Rewired 3v3 line for Nextion display connector to 5v0. Added SERVICE LED for visual heartbeat. Fixed improper labelling on P25 and YSF LEDs. Due to added LEDs this revision requires a new stencil.

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Revision 1

31 Oct 19:27
@phl0 phl0
rev1
467a81c
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Revision 1

These boards have "Revision 1" written on them. All bugs found in revision 0 are fixed in this version. Apart from that, the STM32's BOOT0 and RESET pins are connected to GPIOs of the Raspberry Pi. This way, flashing should be possible without manually jumpering BOOT0 and triggering a reset.

Component placement did not change between revisions 0 and 1, therefore any stencils for revision 0 should work for revision 1 boards, too.

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Revision 0

31 Oct 17:14
@phl0 phl0
rev0
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Revision 0 Pre-release
Pre-release

This was the first released version that still contains a couple of errors. There is a trace missing between L1 and C1 that needs to be fixed with a small blob of solder or magnet wire. Otherwise the RF connector is not connected to the ADF7021. The GND side of C20 and C22 is not connected to the rest of the board's GND, this needs to be fixed with a little wire to any other GND. CE is connected directly to +3.3V which disallows mode scanning to work. If you just use one mode this is fine, otherwise the connection to the CE pin has to be cut and connected to PC14 on the STM32.

Earlier schematics showed C14 as 1uF. This is wrong and needs to be replaced with 1nF, otherwise the ADF7021 will neither receive nor transmit properly.

With these changes, you can build a fully working MMDVM_HS with the old revision 0 boards

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