dennis86
Newbie level 2
hi everyone, I'm newbie. i have few questions wanna ask about this guitar tuner.
The guitar tuner website is: **broken link removed**
The incoming signal is passed through an operational amplifier (U2A), which amplifies it by 800 times. The amplifier is a rail-to-rail National Semiconductor LMC6462 or equivalent. It presents a "zero" at about 133 Hz in its Bode diagram to emphasize the harmonic components of the strings. The output of the amplifier is directly connected to the input of the Schmitt trigger (U2B) that present an hysteresis window centered at ½ VDD with a 1% of power supply voltage width.
1) what is this 800 times input and what is means of rail to rail?
2) why it present a 'zero' at about 133 Hz in its bode diagram? what is the types of harmonics?
3) what U2B is using schmitt trigger? what is the means of hysteresis window?
anyone can answer my question or can tell me more details about this guitar
tuner? im newbie here. im interested to know how to build a guitar tuner. hope anyone can help me. thanks alot : )
The guitar tuner website is: **broken link removed**
The incoming signal is passed through an operational amplifier (U2A), which amplifies it by 800 times. The amplifier is a rail-to-rail National Semiconductor LMC6462 or equivalent. It presents a "zero" at about 133 Hz in its Bode diagram to emphasize the harmonic components of the strings. The output of the amplifier is directly connected to the input of the Schmitt trigger (U2B) that present an hysteresis window centered at ½ VDD with a 1% of power supply voltage width.
1) what is this 800 times input and what is means of rail to rail?
2) why it present a 'zero' at about 133 Hz in its bode diagram? what is the types of harmonics?
3) what U2B is using schmitt trigger? what is the means of hysteresis window?
anyone can answer my question or can tell me more details about this guitar
tuner? im newbie here. im interested to know how to build a guitar tuner. hope anyone can help me. thanks alot : )