Hi EbNaut

 

I have squized the XOR gates needed to modulate BPSK for EbNaut transmissions using the G0MRF PA

 

The final result is a 4013 compatible plugin module. So, you only need to remove the 14Pin DIP 4013 chip and plug the

module in the shocket. For modulation a two pin input connector can be wired to any USB/COM converter even

using 3V3 levels. The Windows EbNaut Tx program will manage the DTR+DSR outputs for this COM port. It uses an

optoisolator. You can resize the series resistor in the input side to adapt for higer voltage drive levels

 

To drive the PA, any cheap NEO6 GPS can be programmed to output the right 2X frequency in LF or MF. The 3V3 can

be the only issue and you need a simple transistor to increase levels to 5V or more

 

The PCB is single side, no drills. Just a wire jump is needed. SMD components are used but I find this easier than drilling

and using pass trought components. This links to a pìcture of the module

https://www.dropbox.com/s/brak1h0j0naqe6y/IMG_20181211_140305_557.jpg?dl=0

 

73 de Luis

EA5DOM