Power design of Mega 2560 R3 board: Arduino Mega power supply system has two options, USB direct power supply or an external power supply. Select the power supply will automatically switch.
Ritchie Yellow Jacket 60610 Standard Reversible Service Wrench with square openings: 1/4" & 3/16" at one end; 3/8" and 5/16" at other end, and Hex Key Adapter (60613 & 60609). All tools are new and in the original factory packaging. Combination service wrench and hex adapter for accessing liquid and suction based valves on residential and commercial units up to 7.5 tons.
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