1.Programmable crystal controlled CTCSS tone encoder kit

2.It can encode the 64 CTCSS tones listed below and generates a sign wave.

3. Output level is fairly flat from 67 to 254.1Hz at approx. 2.4Vp-p.

 from 254.1 to 1000Hz at approx. 1Vp-p. 

from 1000 to 2000Hz at   approx. 560mVp-p.

and then falls gradually to approx. 320mVp-p at 3500Hz, 

most radio require less CTCSS input level at higher frequencies so this is ideal.(10K VR adjust output level range)

4.Two Pins(UP/Down)  to Selected  CTCSS tones .

5.Keep 64 CTCSS tones setting parameter in MCU internal EEPROM, don't worry about power off. Display CTCSS tones by  4 Digit   LED  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. CTCSS tones Frequency Accuracy: Guarantee ±0.2%. It's VIN powered by 7~16V DC.

8. The product needs to be assembled and soldered by yourself.

9. PCB size is 35 x 35mm.

 CTCSS tones listed

No.	tones	No.	tones	No.	tones	No.	tones	No.	tones
0	3500	14	254.1	28	186.2	42	136.5	56	85.4
1	2500	15	250.3	29	183.5	43	131.8	57	82.5
2	2200	16	241.8	30	179.9	44	127.3	58	79.7
3	2000	17	233.6	31	177.3	45	123.0	59	77.0
4	1800	18	229.1	32	173.8	46	118.8	60	74.4
5	1750	19	225.7	33	171.3	47	114.8	61	71.9
6	1500	20	218.1	34	167.9	48	110.9	62	69.3
7	1300	21	210.7	35	165.5	49	107.2	63	67.0
8	1200	22	206.5	36	162.2	50	103.5
9	1100	23	203.5	37	159.8	51	100.0
10	1000	24	199.5	38	156.7	52	97.4
11	900	25	196.6	39	151.4	53	94.8
12	800	26	192.8	40	146.2	54	91.5
13	150	27	189.9	41	141.3	55	88.5

 

BOM List:

Item	Quantity	Note
IC	1	DIP 16
78L05	1	TO-92
7 Segment LED	1	4 Digit  LED  Module
Diode	2	1N4148
7.5K  Resistor	2	1/8W
VR 10K	1
Crystal 32MHz	1
100uF	1	10uF or 47uF
20pF	2	22pF
0.1uF	3	104
PIN Header	1
PCB	1	35 x 35 mm.