4 layers91 × 52 mm

Filament dryer monitor
alessandrocardelli/filament-dryer-monitor
ESP32 controller for eSUN eBOX Lite. main is the non-heating SAFE BRING-UP reference; its heater output remains locked OFF.
110 parts
Boards in 1 GitHub repository, designed in KiCad, that use the L7987L by STMicroelectronics (-40℃~+150℃ 1 11uA 250kHz~1.5MHz 2A 4.5V~61V Adjustable Buck Buck Built-in No HTSSOP-16-EP DC-DC Converters ROHS). See how each wires it, with its parts, size, README and files; the L7987L’s symbol, footprint and pinout are on its own page.

alessandrocardelli/filament-dryer-monitor
ESP32 controller for eSUN eBOX Lite. main is the non-heating SAFE BRING-UP reference; its heater output remains locked OFF.