MrDEB
Well-Known Member
Found the file for SPICE but inserting into the LTSPICE program?
here is the circuit I am trying to figure out WHY I can hear 28khz sounds.
Using a 9v 200ma wall wart. When I used a 9v battery I couldn't hear any sound. Figure it must be V= related. When I change the input square wave to under 12khz I can hear the tone very well but above 12khz it sounds like its underwater.
Using a PIC to output the square wave.
here is the schematic as well. I used slightly different caps but ?
here is the circuit I am trying to figure out WHY I can hear 28khz sounds.
Using a 9v 200ma wall wart. When I used a 9v battery I couldn't hear any sound. Figure it must be V= related. When I change the input square wave to under 12khz I can hear the tone very well but above 12khz it sounds like its underwater.
Using a PIC to output the square wave.
here is the schematic as well. I used slightly different caps but ?