Description

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. 2.4V p-p. from 254.1 to 1000Hz at approx. 1V p-p. from 1000 to 2000Hz at approx. 560mV p-p. and then falls gradually to approx. 320mV p-p at 3500Hz, most radio require less CTCSS input level at higher frequencies so this is ideal.(10K VR adjust output level range) 4.Six DIP-Switch to Selected 64 CTCSS tones . 5.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. 6. CTCSS tones Frequency Accuracy: Guarantee ±0.2%. It's powered by 7 to 16V DC. 7. The product needs to be assembled and soldered by yourself. 8. PCB size is 35 x 35mm. CTCSS tones listed Switch 123456 tones Switch 123456 tones Switch 123456 tones 000000 3500 001110 186.2 000111 85.4 100000 2500 101110 183.5 100111 82.5 010000 2200 011110 179.9 010111 79.7 110000 2000 111110 177.3 110111 77.0 001000 1800 000001 173.8 001111 74.4 101000 1750 100001 171.3 101111 71.9 011000 1500 010001 167.9 011111 69.3 111000 1300 110001 165.5 111111 67.0 000100 1200 001001 162.2 100100 1100 101001 159.8 010100 1000 011001 156.7 110100 900 111001 151.4 001100 800 000101 146.2 101100 150 100101 141.3 011100 254.1 010101 136.5 111100 250.3 110101 131.8 000010 241.8 001101 127.3 100010 233.6 101101 123.0 010010 229.1 011101 118.8 110010 225.7 111101 114.8 001010 218.1 000011 110.9 101010 210.7 100011 107.2 011010 206.5 010011 103.5 111010 203.5 110011 100.0 000110 199.5 001011 97.4 100110 196.6 101011 94.8 010110 192.8 011011 91.5 110110 189.9 111011 88.5 BOM List: Item Quantity Note IC 1 DIP 16 78L05 1 TO-92 DIP Switch 1 DIP 12 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. The buyer needs the basic electronic knowledge and ability of assembling and soldering.