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Leopold FC980C replacement keyboard controller

CoffeeCaller. Once a nice office gadget it now evolved to a small development board for the Nordic nRF52840.

Custom PCB design of an external S-&Watt-Meter for radios. Useful for all enthusiasts and amateur HAM operators.

Open-source ESP32 industrial IoT gateway PCB — wide-input (9-30V), dual MP1584, WiFi+4G+LoRa, IP65. CERN-OHL-S-2.0.