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ATmega328 brains - This popular chip has 32KB of flash (1/2 K is reserved for the bootloader)
Adafruit has a detailed tutorial with lots of information about the VS1053 as well as instructions for how to use their Arduino library that will get you playing sound effects in under 30 minutes
over or under-voltages
it has an onboard switching step-up/step-down regulator that allows it to be powered efficiently from a 2
6 to control the LCD and then another 3 to control the RGB backlight for a total of 9 pins
High Temp Waterproof DS18B20 Digital temperature sensor + extras adapter ATmega328 brains - This popularThis is a pre wired and waterproofed version of the DS18B20 sensor made with a PTFE wire cable. Handy for when you need to measure something far away, or in wet conditions. This sensor is a little more expensive than the other waterproof version we have with a PVC cable because this one can be used up to 125C the limit of the sensor itself. Because the sensor signal is digital, you don't get any signal degradation even over long distances! These 1