guitar tuners

[charlie.t]

hi guys,am new here and really need your help.am half way through an hnd electronic engineering course in blackpool,england, and need to start my end of year project. because i play guitar a little, i thought i would try my hand at building a simple guitar tuner.theres loads of stuff on the internet but where should i start.would like to keep it simple.could anyone tell me the quickest route to go down.thanks

 

[Pommie]

The simplest way is to flash an LED at the right frequency and use it as a stroboscope. When the string is tuned it appears still.

Mike.

 

[charlie.t]

thanks mike.initially what components will i need to consider using.am i correct in assuming i need a micro controller to convert frequency to voltage?
charlie

 

[charlie.t]

thanks mike.what components parts would i need to consider for such a tuner.charlie

 

[House0Fwax]

am i correct in assuming i need a micro controller to convert frequency to voltage?

Not necessarily, you can do it with a LM2917

 

[colin mac]

https://images.google.ie/imgres?imgurl=https://instruct1.cit.cornell.edu/courses/ee476/FinalProjects/s2004/ddb25/complete2_files/image005.jpg&imgrefurl=http://instruct1.cit.cornell.edu/courses/ee476/FinalProjects/s2004/ddb25/complete2.htm&h=316&w=576&sz=14&hl=en&start=18&um=1&tbnid=pJQrTWmOjdNqhM:&tbnh=74&tbnw=134&prev=/images%3Fq%3Dguitar%2Btuner%2BPIC%2Bmicrocontroller%26um%3D1%26hl%3Den%26safe%3Doff%26sa%3DN

I wonder if this circuit is any good. He amplifies the output of an electric guitar which goes to the input of a microcontroller that detects the zero crossing
for a number of cycles then uses a lookup table to determine the frequency.