7 months ago 521
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Arduino NANO VOX PTT for Baofeng. Interface to PC. Can use with Zello. Adjutable hold in code. Maybe add isolation transformers later. One channel for the trigger. Other channel audio pass through.


Nano VOX


ID Name Designator Footprint Quantity Manufacturer Part Manufacturer Supplier Supplier Part Price LCSC Assembly Mounted BOM_Manufacturer Part BOM_Supplier Part BOM_Supplier BOM_Manufacturer BOM_Mounted
1 Arduino_Nano_V3_mod U1 ARDUINO NANO V3 1 Arduino Nano V3
2 Relay module for Arduino U2 ARDUINO RELAY 5V MODULE 30A 1 Relay module for Arduino
3 USB_Sound_Card U3 USB-AUDIO 1 USB Sound Card
4 10K VR1,VR2 P120PK-Y25BR10K 2 858-P120PKY25BR10K 858-P120PKY25BR10K Mouser BI Technologies / TT Electronics
5 SoundSensor_Arduino_LM393 U4 NONE 1 Yes
6 . H1 HDR-2X1/2.54 1 826629-2 C86471 LCSC TE Connectivity
7 10K R3 AXIAL10 1 Resistor MF25 10K, 0.25W 934-1110 Element14
8 10uF C1 CAP-D5.0XF2.0 1 electrolytic capacitor 10UF 50V high frequency C78759 LCSC ValuePro
9 Signal Diode D1,D2 AXIAL-6.5X2.3(DIODES) 2 1N4004RLG C232436 LCSC ON Semicon
10 DS3231 U5 DS3231 1 New SchematicLib
11 220r R1 AXIAL-0.3 1
12 SPDT SW1 M9040P 1


Filename Download
VOX code UNO.txt
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Comments (1)

pattang2018 Reply

Code attached.
Easy to modify time delay.
Remove mic element from Sound Sensor then connect directly to speaker output from usb sound card one channel.Other channel is pass through to mic input on radio.
Sound level trigger trimmer on SoundSensor_Arduino_LM393
Simple circuit.
It works.

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