Low-Freq Ultrasonic Driver Design
Budget: €250 – €750 EUR
I’m looking for an electronics engineer to design a compact, efficient driver board for piezoelectric ultrasonic transducers operating between 20 kHz and 30 kHz.
The system should allow variable frequency operation and multi-harmonic emission based on pseudorandom modulation (PRN) to create a broadband ultrasonic spectrum.
Requirements:
• Full schematic, BOM, and PCB (KiCad or Altium)
• Configurable center frequency (20–30 kHz) with step ≤10 Hz
• Firmware for amplitude/frequency control and short sweep for resonance tuning
• Capable of multi-harmonic PRN modulation (8–16 preset patterns, selectable seed)
• Efficiency ≥85 % at typical load (specify Vpp @ load C ≈ N nF)
• Basic protections: over-current, over-temperature, open-load
• UART/I²C interface for control and testing
It has tobe be compact, battery-powered device about 12 × 6 × 1 cm. The audio emitter should be very small, ideally integrated directly on the board, or alternatively connected via a short cable.
Note: depending on project stage, you may be asked to sign a Non-Disclosure Agreement (NDA) before detailed specifications are shared.
The system should allow variable frequency operation and multi-harmonic emission based on pseudorandom modulation (PRN) to create a broadband ultrasonic spectrum.
Requirements:
• Full schematic, BOM, and PCB (KiCad or Altium)
• Configurable center frequency (20–30 kHz) with step ≤10 Hz
• Firmware for amplitude/frequency control and short sweep for resonance tuning
• Capable of multi-harmonic PRN modulation (8–16 preset patterns, selectable seed)
• Efficiency ≥85 % at typical load (specify Vpp @ load C ≈ N nF)
• Basic protections: over-current, over-temperature, open-load
• UART/I²C interface for control and testing
It has tobe be compact, battery-powered device about 12 × 6 × 1 cm. The audio emitter should be very small, ideally integrated directly on the board, or alternatively connected via a short cable.
Note: depending on project stage, you may be asked to sign a Non-Disclosure Agreement (NDA) before detailed specifications are shared.