Andy Karpov

UKRAINE • + Follow

Engineer

RUSSIAN FEDERATION
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Description

Compact 433 MHz walkie-talkie based on MRF49XA transceiver

The project is about to create a small portable DIY walkie-talkie, based on the idea and schematics from the https://vrtp.ru/index.php?act=categories&CODE=article&article=3351 article.

It based on MRF49XA transceiver IC, PIC16F628 uC and support a direct half-duplex voice communication on ~433 MHz (up to 4 channels supported).

The overall distance of the original project is about 1.5 km, but my design uses a smaller voltage (3.7v with step-up converter to 5v), so the overall distance will be reduced twice a minimum. Waiting for the PCBs to give a try :)

The PCB was designed for the GAINTA G403 (G431) enclosure. You'll only need to drill a few holes (for the LEDs, switch, usb, volume control and atenna connector).

Code

https://github.com/andykarpov/walkie-talkie

Schematic and Layout

https://vrtp.ru/index.php?act=categories&CODE=article&article=3351

Download Gerbers

May 08,2020

3,235 views

Compact 433 MHz walkie-talkie based on MRF49XA transceiver

2 Layers PCB 78.7 x 44.5 mm FR-4, 1.6 mm, 1, HASL with lead, Blue Solder Mask, White silkscreen

A compact 433 MHz walkie-talkie on MRF49XA for the Gainta G403 (G431) enclosure

3235

Published: May 08,2020

Standard PCB

Download Gerber file 34

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