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HERE IT IS - BeaconTNG E-mail
Written by Administrator   
Friday, 23 April 2010 21:12










Today I finished the PCB layout for the BeaconTNG system. Here are the current
schematics. I would be happy about comments. The PCB will be a 4 layer multilayer
board with 233x100mm.
The GPS module will be located on a small separat PCB that will be stacked to the
main board in the top left corner. There is another pin header connector to the
right of the GPS which can hold an option module for future enhancements.
As in the first version of the Beacon 8 LPF modules will be placed in sockets on
individual small PCBs.

Here are the schematics:

CPU

power supply & management

GPS interface

LPF modules

preamp & PA

antenna switch I/O

DDS module

GPS module

display module



Find out more about the BeaconTNG procect here!

Stay tuned on the project.
73
Gernot
 







  
Last Updated on Friday, 21 May 2010 08:27
 
BeaconTNG building blocks E-mail
Written by Administrator   
Saturday, 27 March 2010 12:51



Slowly all the building blocks for the BeaconTNG project are getting together. The code is running now on the new CPU and the TCP/IP
stack is working.  With support of YO2LIO who wrote some excellent libraries for the Mikroe compilers I implemented a Telnet server.
Function is there, now I have to implement features for the CLI. All building blocks are now moved to 3.3V supply. For that I had to reduce
the master clock from 30MHz to 20MHz, as the AD9851 only supports 20.83MHz at 3.3V.

·         The ICSP interface of the CPU will move to a pin head connector inside the box as it will not be needed by the user. Software updates
      can be done by a TFTP bootloader via Ethernet.
·         The GPS receiver will have two external connectors for the 1pps signal and an GPS oscillator output. This way the unit can be used in 
      the shack as a frequency reference when it is not in use as a beacon.
·         There will be a slot for a future option module. This could be a VLF amplifier, a frequency multiplier or something I can't think of yet. 
      The DDS source signal, SPI Bus and some of the spare I/Os will be available to this slot.
·         An antenna switch controller will be integrated with 8 opto-isolated outputs. These can be used to switch antennas or external amplifiers.

Soon I will have the PCB layout ready and order the first sample. Comments and ideas are very welcome!

Find out more about the BeaconTNG procect here!

Stay tuned on the project.
73
Gernot
 
Last Updated on Friday, 02 April 2010 15:18