Sounder by Deltronic Labs. Rev. 1.01
3
Protocol 4:
Protocol 4 is the same as protocol 2 except that the inputs are de-bounced. De-
bouncing is used with mechanical switches to prevent multiple triggers which can
sound like stuttering at the beginning of a sound. Pins 2, 4, 6, and 8 or both Control
inputs are ground. This makes it easy to connect a push button for triggering the
sounds. Just connect the button to an odd numbered input pin and an even numbered
ground pin.
Protocol 5:
Protocol 5 reads the value encoded on pins 1, 3, and 5 when it sees a high to low
transition on pin 7, and plays the selected sound. Control input A plays on Channel
A. Control input B plays on channel B.
Pin 5
Pin 3
Pin 1
Sound Played on A
Sound Played on B
1
1
1
1
1
1
1
0
2
2
1
0
1
3
3
1
0
0
4
4
0
1
1
5
5
0
1
0
6
6
0
0
1
7
7
0
0
0
8
8
Protocol 6:
Protocol 6 reads the value encoded on pins 1, 3, and 5 when it sees a high to low
transition on pin 7 and plays the selected sound. Control input A plays on Channel
A. Control input B plays on channel B.
Pin 5
Pin 3
Pin 1
Sound Played on A
Sound Played on B
1
1
1
1
9
1
1
0
2
10
1
0
1
3
11
1
0
0
4
12
0
1
1
5
13
0
1
0
6
14
0
0
1
7
15
0
0
0
8
16
Protocol 7:
Protocol 7 uses one byte commands received through the RS-232 connection that is
also used to program the Sounder board. The RS-232 parameters are 115,200 baud,
no parity, 8 bits, 1 stop bit. The RS-232 connection uses the 8 pin PGM connector
on the Sounder board.
