Mini-Kits EME243 is an interface module that has been designed to provide a PTT output from the PLUTO GPIO0 connection when used with the F5OEO firmware. The board uses a PDTC143XT digital transistor that has an open collector that can be used to pull a voltage low via a suitable resistor, when going into PTT mode. The PDTC143XT collector to emitter is rated at +50vdc and 100mA maximum, so it should only be used to switch low current logic circuitry and relays.

This module is easily fitted to the Pluto but does require the firmware to be updated as detailed on the Mini-Kits Adalm-Pluto Webpage