Extensions
I've applied the following extension to my nanoKeyer:
- Powersupply
- Memory bank selection
- smaller code changes
Power-supply
The Arduino nano board has a direct input to its 5V regulator. When applying 13.8V to this input, the regulator gets a little bit hot. This simple circuit
reduces the the input voltage about 3.2V, which helps to keep the regulator cooler. Additionaly a reverse-polarity protecion circuit and a rf-filter is provided.
Memory bank selection
On the current nanoKeyer circuit board, only three memory keys and the command key are available. Usually I work /qrp and /p so I don't want to reprogramm the memories constantly.
I've added a single-pole, three position switch to select te memories 1-3, 4-6 or 7-9 on the three memory buttons.
The sketch has to be updated, to support the switch settings correctly.
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//------------------------------------------------------------------
#ifndef FEATURE_LEGACY_BUTTONS
#ifdef DK_BANKSWITCH
void setOneButton(int button, int index) {
int button_value = int(1023 * (float(button *
analog_buttons_r2)/float((button * analog_buttons_r2) +
analog_buttons_r1)));
int lower_button_value = int(1023 * (float((button-1) *
analog_buttons_r2)/float(((button-1) * analog_buttons_r2) +
analog_buttons_r1)));
int higher_button_value = int(1023 * (float((button+1) *
analog_buttons_r2)/float(((button+1) * analog_buttons_r2) +
analog_buttons_r1)));
button_array_low_limit[index] = (button_value - ((button_value -
lower_button_value)/2));
button_array_high_limit[index] = (button_value + ((higher_button_value -
button_value)/2));
}
void initialize_analog_button_array() {
setOneButton(0,0);
setOneButton(1,3);
setOneButton(2,2);
setOneButton(3,1);
setOneButton(4,9);
setOneButton(5,8);
setOneButton(6,7);
setOneButton(7,6);
setOneButton(8,5);
setOneButton(9,4);
}
#else
void initialize_analog_button_array() {
int button_value;
int lower_button_value;
int higher_button_value;
#ifdef OPTION_REVERSE_BUTTON_ORDER
byte y = analog_buttons_number_of_buttons - 1;
#endif
for (int x = 0;x < analog_buttons_number_of_buttons;x++) {
button_value = int(1023 * (float(x * analog_buttons_r2)/float((x *
analog_buttons_r2) + analog_buttons_r1)));
lower_button_value = int(1023 * (float((x-1) *
analog_buttons_r2)/float(((x-1) * analog_buttons_r2) +
analog_buttons_r1)));
higher_button_value = int(1023 * (float((x+1) *
analog_buttons_r2)/float(((x+1) * analog_buttons_r2) +
analog_buttons_r1)));
#ifndef OPTION_REVERSE_BUTTON_ORDER
button_array_low_limit[x] = (button_value - ((button_value -
lower_button_value)/2));
button_array_high_limit[x] = (button_value + ((higher_button_value -
button_value)/2));
#else
button_array_low_limit[y] = (button_value - ((button_value -
lower_button_value)/2));
button_array_high_limit[y] = (button_value + ((higher_button_value -
button_value)/2));
y--;
#endif
}
}
#endif
#endif
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The updated sketch can be downloaded from here.
Code updated to the Say-Hi Feature
The Say-Hi feature is coded a little bit "ugly". I've updated the feature this way:
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if (machine_mode != BEACON) {
#ifdef FEATURE_SAY_HI
// store current setting
int oldKey = key_tx;
key_tx = 0;
int oldSideTone=sidetone_mode;
sidetone_mode = SIDETONE_ON;
// say HI
delay(201);
send_char('D',NORMAL);
send_char('L',NORMAL);
send_char('2',NORMAL);
send_char('S',NORMAL);
send_char('B',NORMAL);
send_char('A',NORMAL);
sidetone_mode = oldSideTone;
key_tx = oldKey;
#endif
}
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The keyer now sends my call during power-up even if the sidetone is switched of. The state of the transmitter key is also save correctly.
