PTT GREEN YELLOW MIC RED BLUE 12 V
PTT GREEN YELLOW MIC RED BLUE +12 V MIC (out) PTT GND 33 u 16 V 6800Ω +- 3522147 17901 PTT RED GND BLUE board side PTT button lightblue YELLOW MIC GREEN +12 V
1 u MIC in 560 BC 547 8 k 2 47 k 10 k 470 3 k 3 8 k 2 10 u. H 33 k
MIC gnd 33 u. F 16 V + to green connector via 10 u. H inductor 6 k 8 0. 1 u. F 10% 100 V BC 547 connects 47 k to yellow BC 547 100 p 4 n 7 47Ω 4 n 7 + 1 u. F 3 k 9 22Ω BC 557 10 k 10 u. H 22Ω 1 k 8 GREEN 39 u light blue YELLOW
1 u C 1 560 R 1 BC 547 TS 1 e 8 k 2 R 3 b BC 547 TS 2 e C 8 470 R 4 10 k R 2 e 3 k 3 R 5 BC 557 TS 5 0. 33 u C 2 BC 547 TS 3 8 k 2 R 6 47 k R 13 10 u. H L 1 1 u C 3 33 k R 9 100 p C 9 b 47Ω R 7 c e 22Ω R 15 BC 547 TS 4 1 k 8 4 n 7 C 10 c c c MICROPHONE b 10 k R 8 b b e c 6 k 8 R 16 3 u 3 C 6 39 u C 4 c 47 k R 10 BAW 62 GR 1 ak 1 u C 5 e 3 k 9 R 12 b 10 u. H 22Ω L 2 R 14 R 9 +12 V - via PTT MIC OUT BC 547 TS 6
10 u L 1 10 k R 2 1 u C 1 560 R 1 3 k 3 R 5 BC 547 TS 1 0. 33 u C 2 8 k 2 BC 547 R 6 TS 2 47 R 7 8 k 2 R 3 MC 1 microphone GREEN +12 V 470 BC 547 R 4 TS 3 10 u L 2 PTT RED PTT BLUE GND light blue 1 u C 3 22 R 14 10 k R 8 47 k R 10 BAW 62 GR 1 BC 557 TS 5 3 u 3 C 6 100 p C 9 1 k 8 R 11 33 k R 9 47 k R 13 BC 547 TS 6 BC 547 TS 4 22 R 15 100 n C 8 3 k 9 R 12 1 u C 5 39 u C 4 4 n 7 C 10 6 k 8 R 16 colors connection cable differ from original schematic 33 u 16 V C 7 YELLOW OUT
http: //lea. hamradio. si/~s 53 mv/dds/design. html A simple low-current voltage doubler may be built with the 7660 chip. A similar circuit can also be built with the more popular 74 HC 4053 chip as shown on the following drawing: The 74 HC 4053 requires just a few capacitors and resistors to operate as a low-current (1 m. A) negative-voltage doubler. The first switch of the 74 HC 4053 is used as a non-inverting amplifier for the oscillator operating at around 70 k. Hz. The second switch acts both as an inverting amplifier for the oscillator and as an output driver. Finally the third switch operates as a synchronous rectifier for the negative output voltage.
computer USB +5 V PTT VDD GREEN 4053 Voltage inverter YELLOW VEE (-5 V) computer USB GND VSS MIC RED BLUE +12 V 3. 5 mm plug computer in MIC (out) PTT GND 3. 5 mm plug computer gnd (do not connect)
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