2 layers

UltrasonicTransmitter
pranphy/TransmitterCircuit
Ultrasonic Transmitter circuit design in KiCad
31 parts1
Printed circuit boards designed in KiCad and published on GitHub, each with its parts, layers and size, its README and its files; open any of them in PCBKit.

pranphy/TransmitterCircuit
Ultrasonic Transmitter circuit design in KiCad