color image of a classic test circuit will monitor the audio output of this circuit in addition to the music in the game are from the old ateri amp could work in the test… Electronics Projects, Monitor Test Circuit with atmega88 “avr project, microcontroller projects, “
color image of a classic test circuit will monitor the audio output of this circuit in addition to the music in the game are from the old ateri amp could work in the test sample watch the video you’ll see 
MONITOR TEST CIRCUIT WORK
Source: linusakesson.net Source2: MONITOR TEST CIRCUIT WITH ATMEGA88 Monitor Test Circuit with atmega88 alternative link: monitor-test-circuit-with-atmega88.rar