The hardware was assembled by connecting the Arduino UNO R4 WiFi, the PZEM 004T, the current transformer, and the OLED ...
An LM555 timer paired with an NTC thermistor makes a simple, configurable ON/OFF thermostat for heating or cooling.
Botox, FYI, is the brand name for an FDA-approved drug called botulinum toxin (aka a nerve-blocking drug, more on this below) that temporarily "freezes" muscles in your face to help smooth out frown ...
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