I have seen other people workin on tuners, but mine will be for a bass, maybe it will work on a guitar. Anywho, I'm starting with a frequency to voltage converter, Philips' ECG 995(closest to the LM2917 I could get) and I just have that part made. I tested with my bass and I'm just getting an output of 6.29 V. Could anyone help or give hints as to an indicator? I have an idea using three LEDs: one for being too low (flat), one for high (sharp) and one for in tune. I have a digital cam so I can take photos if needed. Thanks!