Boards in 1 GitHub repository, designed in KiCad, that use the LM2937L-33-TQ2-R by UTC (-40℃~+125℃ 1 100uVrms 10mA 26V 3.3V 500mA 500mV@(500mA) Fixed Over Temperature Protection、Short Circuit Protection Positive TO-263-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHS). See how each wires it, with its parts, size, README and files; the LM2937L-33-TQ2-R’s symbol, footprint and pinout are on its own page.
xNiDx/EEE3088F-PROJECT
The door unlocks if there is an object in close proximity and a certain sound is pplayed for some time. This is to be paired with a device that emits a sound, which is not in the scope of this project.