USER MANUAL FOR HARDWARE REV 1.0
06-JUN-2019
PAGE 1
PI-REPEATER-1X
HARDWARE REVISION 1.0
1.
WELCOME
Thank you for purchasing the PI-REPEATER-1X, the first repeater controller board designed to be
powered by the ubiquitous Raspberry Pi computer systems.
This little piece of hardware mates to the Raspberry Pi just like any other daughter card you may have
used for the Raspberry Pi, Arduino, or other development platform.
This system enables you to have a variety of control options for your station, including simplex, duplex,
echo-link, etc.
We use multiturn potentiometers for fine adjustment of the audio, offer hardware pre-emphasis
filtering, active high / active low selects for each COS / CTCSS input signal, and have inputs tolerant to
18Vdc for the signals coming from the radio.
This board will work with any software that is capable of interacting with the sound card (I2S), and
GPIO (I2C required)) for radio interfaces. We recommend getting started with SVXlink, but the choice
is ultimately yours! Feel free to experiment and decide which system best fits your requirements.