Arduino Projects for Amateur Radio by Jack Purdum

Author:Jack Purdum
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2015-04-12T04:00:00+00:00

CW Decoder Shield

The decoder shield uses analog pin A5 as its input from the speakers. The A5 analog pin on the expansion board is found at the South-West position (2) on the board. For that reason, we placed the decoder shield at the S-W position of the expansion board. However, because pin A5 on the decoder shield does not line up with A5 on the expansion board, we soldered a small jumper between the two pins on the decoder shield.

Because we intend to share the LCD display on the RTC board with the decoder shield, we simply unplugged the decoder LCD display from its socket header. Whatever output might be generated by the decoder shield is routed to the RTC shield using the same LCD object (i.e., lcd) we create in software. From the perspective of the decoder shield, it appears that the LCD shield is the same as before. The multiple use of the LCD display is our first example of a shared resource in this project.

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