Detection of AC analogue signal
I am trying to have my basic stamp tell when a metal detector is showing metal. The signal from the speaker is incredibly nasty AC spikes
· All I want is a conditioner that gives a high with detection (Presence of signal). Any ideas?
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Comments
·· You could use a comparator or you could just feed the speaker output to the Stamp pin with a ZENER diode (5.1V we sell)·shunt to ground.
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Chris Savage
Parallax Tech Support
csavage@parallax.com
·· On the comparator that really depends on which one you use and its specifications.· You can always clamp the input to the BASIC Stamp with the Zener.· This Diode is a 2 lead device with an anode and a cathode.· The cathode goes to the I/O pin and the anode goes to ground.· The end with the black ring/line is usually the cathode side.
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Chris Savage
Parallax Tech Support
csavage@parallax.com