RC Delay - Use as a "Timer"

This is a simple circuit from tutorials.  It could be used to place a delay between the closing of the switch shown in the figure and the "ON->OFF" signal on the comparator output.  This is used, for example, to place a delay between switching on an amplifier and the turning on of a loudspeaker - to prevent the nasty "thump" or "crack" as the power to the amplifier "hits" the speaker.  With the delay, any settling-down in the amplifier's power supply is over by the time the speaker is swtiched in - typoically after a few seconds.

RC Delay - Use as a "Timer"
RC Delay - Use as a "Timer"
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File speaker_timer.xlsx133.52 KB