RDL ST-GCA3 Gain Control Amplifier - Power Supply Included

the STA cr2 is a precision cost-effective audio controlled relay that provides an active open collector and switches to amp double pole double throw relay contacts when it detects line level audio when audio is absent for a period of five to fifty seconds the open collector and relay contacts are switched off the extended off delay period makes the sta CR to equally useful as a silence sensor the sta CR - detector input may be connected to a line level output of balanced professional equipment or unbalanced consumer products each of these sources provides a different level into the sta CR - requiring the modules input sensitivity to be adjustable adjustment is simple with the audio source active adjust a multi turn trimmer until the signal is detected as indicated by the led when the audio signal is no longer present the sta cr2 weights a specific amount of time to be certain the audio