[Kalle Hyvönen] just finished building his own aquarium lights. He used four powerful soft-white LEDs, mounting them on a pair of heat sinks to keep things cool. Now he could have just connected them ...
Arduino-based aquarium temperature control system using a DS18B20 sensor, 1602 LCD Keypad Shield, and PWM-controlled fans. Adjust and store temperature settings via a menu with EEPROM persistence.
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