Guest nanop Posted August 26, 2006 Report Share Posted August 26, 2006 Hi!I'm planning to build the following circuit and I have some questions about the following project:http://www.electronics-lab.com/projects/science/006/index.htmlSince the LF351 is no longer available, can I use the TL07x series, TL071, TL082, or possibly a LM741, or LM386?What kind of meter and range do I use?Or possibly skip this and just use the earphone?The last one is, what are the pin connections? THe schematic doesn't show the pin #'s.thanks very much!! Quote Link to comment Share on other sites More sharing options...
audioguru Posted August 28, 2006 Report Share Posted August 28, 2006 Since the LF351 is no longer available, can I use the TL07x series, TL071, TL082, or possibly a LM741, or LM386?It is such a simple circuit that it will work with any opamp. An LM386 is a power amplifier with a pre-determined gain, not an opamp, and the circuit won't have enough gain with it. What kind of meter and range do I use?The project doesn't say anything about the meter. It is driven by the 10k resistor with a few volts, so a 200uA meter will work.Or possibly skip this and just use the earphone?What do you expect to hear? Lots of mains hum.The last one is, what are the pin connections? THe schematic doesn't show the pin #'s.Look on the datasheet for the opamp. Quote Link to comment Share on other sites More sharing options...
faizanbrohi Posted September 4, 2006 Report Share Posted September 4, 2006 " Are you a ghost hunter? Then this is the circuit that you've been waiting for! Since it has been observed that appearance of a ghost tends to disturb the EMF, you can now detect any such changes with this little detector."I think we are hunting ghosts with this meter Quote Link to comment Share on other sites More sharing options...
audioguru Posted September 4, 2006 Report Share Posted September 4, 2006 Steven uses his to detect UFO's flying around his place at night. ;D Quote Link to comment Share on other sites More sharing options...
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