2016年2月11日 星期四

Programmable crystal controlled CTCSS tone encoder kit (Version 2)

Programmable crystal controlled CTCSS tone encoder kit
(Version 2)














pcb8051@gmail.com

1.      Programmable crystal controlled CTCSS tone encoder kit
2.      It can encode the 47 CTCSS tones listed below and generates a sign wave.
3.      Output level is fairly flat from 67 to 118Hz at approx. 3V p-p
and then falls gradually to approx. 1V p-p at 254Hz, most
radio’s require less CTCSS input level at higher frequencies
so this is ideal.(10K VR adjust output level range)
4.      Two Keypads to Selected 47 CTCSS tones .
5.      Keep 47 CTCSS tones setting parameter in PIC16 internal EEPROM, don't worry about power off. Display CTCSS tones by 4 digit LED display module.
6.      There is an encode enable input that connects to the radio's
PTT line (active low). You can tie the encode enable input (PTT) to ground for continuous encode.
7.      47 CTCSS tones Frequency Accuracy: Guarantee ±0.01%.
8.      It's powered by 7 to 16V DC and draws less them 15 mA.
9.      The product needs to be assembled and soldered by yourself.
10.  PCB size is 55 x 57mm.

Note: 47 CTCSS tones listed
OFF,   183.5 Hz,   110.9 Hz,
254.1 Hz,   179.9 Hz,   107.2 Hz,
250.3 Hz,   173.8 Hz,   103.5 Hz,
241.8 Hz,   167.9 Hz,   100.0 Hz,
233.6 Hz,   162.2 Hz,    97.4 Hz,
229.1 Hz,   159.8 Hz,    94.8 Hz,
225.7 Hz,   156.7 Hz,    91.5 Hz,
218.1 Hz,   151.4 Hz,    88.5 Hz,
210.7 Hz,   146.2 Hz,    85.4 Hz,
206.5 Hz,   141.3 Hz,    82.5 Hz,
203.5 Hz,   136.5 Hz,    79.7 Hz,
199.5 Hz,   131.8 Hz,    77.0 Hz,
196.6 Hz,   127.3 Hz,    74.4 Hz,
192.8 Hz,   123.0 Hz,    71.9 Hz,
189.9 Hz,   118.8 Hz,    69.3 Hz,
186.2 Hz,   114.8 Hz,    67.0 Hz,



BOM List:
PIC16F883  IC      x1
DIP 28
MCP4921   IC      x1
DIP 8
78L05              x1
TO-92
Digit LED_4         x2
DIP 12
8P4R  Resistor     x2
1K~4.7K
5P4R  Resistor     x1
1K~4.7K
Push Button        x2
DIP 4
Diode 1N4148      x2

10K  Resistor      x2
1/8W
VR 10K            x1

Crystal 20MHz      x1

100uF or 10uF      x1

20pF or 22pF       x2

0.1uF              x3
104
0.47uF             x1
474
0.33uF             x1
334
PIN Header         x1

PCB               x1












Note:
1.5P4R Attention Pin 1







2. Capacity 100uF Attention polarity