2 layers118.3 × 42.7 mm

PCB piezo filter v3
djorgeext/PCB_piezo-filter_v4
Fourth version of a pre-conditioning circuit for an analog PCG signal based on a piezoelectric sensor.
48 parts
Boards in 1 GitHub repository, designed in KiCad, that use the TLC2262CP by Texas Instruments (-8V~8V 0℃~+70℃ 100pA 100pA 12nV/√Hz@1kHz 2 2.5mV 2uV/℃ 500uA 50mA 550V/ms 710kHz 83dB Rail-to-rail output PDIP-8 Operational Amplifier ROHS). See how each wires it, with its parts, size, README and files; the TLC2262CP’s symbol, footprint and pinout are on its own page.

djorgeext/PCB_piezo-filter_v4
Fourth version of a pre-conditioning circuit for an analog PCG signal based on a piezoelectric sensor.