A free, browser-based guitar tuner that uses your device's microphone to detect pitch. No app download required. Supports standard EADGBE tuning at 440 Hz.

A chromatic guitar tuner that runs in your browser. Uses your microphone to detect pitch in real-time and shows how in-tune you are with a visual gauge.

As regular readers will know, here at Hackaday we are great enthusiasts for the PCB as an art form. On a special level of their own in that arena are the Boldport kits from [Saar Drimer], superlative ...