OTXUGK YK01 Frequency Generator vs 7.83Hz Schumann Frequency Generator

Both are USB-powered signal generators built around a 7.83 Hz Schumann default, and they share the same core specs: 0.01 Hz to 200 kHz range, sine/square/inverted square output, and 3 V sine amplitude. The OTXUGK YK01 is the more complete instrument: it adds a built-in frequency detector (1–100 Hz), headphone output for audio-range listening, and a stated 0.01 Hz resolution. The SWRG002 matches the waveform set and adds a 5 V square-wave amplitude plus a DC barrel jack option, but it is a bare board with no detector and no headphone path. Buyers who want to measure and hear frequencies should step up to the YK01; buyers who only need a fixed 7.83 Hz carrier and a 5 V square wave can take the simpler board.

• Choose the OTXUGK YK01 if you want a self-contained unit with a frequency detector, headphone output, and fine 0.01 Hz resolution, not just a fixed 7.83 Hz emitter.
• Choose the SWRG002 if you only need a steady 7.83 Hz sine carrier or a 5 V square wave and are fine with a bare circuit board powered over USB or a DC jack.