2 layers74.9 × 152.4 mm

OAM Time Machine
patamari/4U-OAM-Time-Machine
4U port of the Olivia Artz Modular Time Machine + the Timo Rozendal expander
94 parts1
Boards in 2 GitHub repositories, designed in KiCad, that use the TL071HID by Texas Instruments (-20V~-2.25V、2.25V~20V -40℃~+125℃ 0.5pA 1 105dB 1mV 1pA 20V/us 26mA 2uV/℃ 37nV/√Hz@1kHz 4.5V~40V 5.25MHz 960uA Short-Circuit Protection、EMI filtering/RF suppression SOIC-8 FET Input Amplifiers ROHS). See how each wires it, with its parts, size, README and files; the TL071HID’s symbol, footprint and pinout are on its own page.

patamari/4U-OAM-Time-Machine
4U port of the Olivia Artz Modular Time Machine + the Timo Rozendal expander

dwmorrin/guitar-preamp
High impedance guitar preamp with variable 0 to 33 dB gain.