Real-Time B-H Loop Visualizer
Budget: $30 – $250 USD
I need a complete, bench-ready setup that lets me watch a ferromagnetic core trace its B-H hysteresis loop live on an oscilloscope screen. All measurements will be taken with my Waveform (Analog Discovery) unit acting as both function generator and two-channel scope, so please design everything around that platform and its WaveForms software.
The job breaks down into a few concrete tasks:
• Circuit: create a schematic and breadboard / PCB layout that injects a ± triangular current through the test inductor, senses the magnetising field (H) via a precision series resistor, and produces the flux density (B) signal with an RC integrator. Component values should keep signals comfortably within the ±5 V input range of the Analog Discovery.
• Instrument setup: provide the exact WaveForms configuration—channel coupling, scale factors, math channels if useful—so the Lissajous display shows a clean, centred hysteresis loop in real time.
• Material handling: specify how to mount and connect my ferromagnetic sample (a small toroidal core is available) so stray inductance or heating do not distort the plot.
• Documentation & deliverables:
– finished schematic (PDF + editable format)
– BOM with part numbers I can source from Digi-Key or Mouser
– step-by-step setup guide with screenshots of WaveForms settings
– brief explanation of the underlying equations, so I can tweak component values for other cores later
The solution is successful when I can power up the circuit, load your WaveForms workspace, and immediately watch a stable, repeatable hysteresis loop sweep across the screen without manual post-processing.
The job breaks down into a few concrete tasks:
• Circuit: create a schematic and breadboard / PCB layout that injects a ± triangular current through the test inductor, senses the magnetising field (H) via a precision series resistor, and produces the flux density (B) signal with an RC integrator. Component values should keep signals comfortably within the ±5 V input range of the Analog Discovery.
• Instrument setup: provide the exact WaveForms configuration—channel coupling, scale factors, math channels if useful—so the Lissajous display shows a clean, centred hysteresis loop in real time.
• Material handling: specify how to mount and connect my ferromagnetic sample (a small toroidal core is available) so stray inductance or heating do not distort the plot.
• Documentation & deliverables:
– finished schematic (PDF + editable format)
– BOM with part numbers I can source from Digi-Key or Mouser
– step-by-step setup guide with screenshots of WaveForms settings
– brief explanation of the underlying equations, so I can tweak component values for other cores later
The solution is successful when I can power up the circuit, load your WaveForms workspace, and immediately watch a stable, repeatable hysteresis loop sweep across the screen without manual post-processing.