RDL Voice Activated Relay
By Radio Design Labs (ST-VOX1)
Versatile module accepts unbalanced line or mic level signal and provides switched DPDT contacts. An open collector output is also provided for slave units. Applications include converting PTT (push to talk) function to hands free, automatic muting and audio signal sensing for auto-power-on function. Sensitivity and release delay are adjusted via individual 25 turn potentiometers.