Compact Low-Frequency Sine Wave PCB
Budget: $30 – $250 USD
I need a miniature sine-wave transmitter board. I will supply the exact antenna footprint and the precise target frequency (it will be somewhere below 100hz, specified down to the decimal). Your task is to design a PCB smaller than 2 cm × 2 cm that generates a clean, low-distortion sine wave, feeds it to the antenna, and runs for at least one month on a single CR2032 coin cell. It has step sweep formula
Long-term frequency stability, minimal harmonic content, and ultra-low power consumption are critical. Feel free to use discrete components, a low-power MCU with DAC, a numerically controlled oscillator, or any other architecture that can hit the spec while staying inside the tight footprint and power envelope.
Deliverables
• Complete schematic and PCB layout (KiCad, Altium, or Eagle)
• Gerbers and pick-and-place files ready for fabrication
• BOM with currently available parts
• Any firmware or configuration files required, with build instructions
• Brief validation (simulation plots or bench data) showing frequency accuracy and projected battery life
If you need additional details on the antenna coupling or acceptable duty-cycling, let me know and we’ll finalize the spec together.
Long-term frequency stability, minimal harmonic content, and ultra-low power consumption are critical. Feel free to use discrete components, a low-power MCU with DAC, a numerically controlled oscillator, or any other architecture that can hit the spec while staying inside the tight footprint and power envelope.
Deliverables
• Complete schematic and PCB layout (KiCad, Altium, or Eagle)
• Gerbers and pick-and-place files ready for fabrication
• BOM with currently available parts
• Any firmware or configuration files required, with build instructions
• Brief validation (simulation plots or bench data) showing frequency accuracy and projected battery life
If you need additional details on the antenna coupling or acceptable duty-cycling, let me know and we’ll finalize the spec together.