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                    ... headers are 2.54mm (0.1”) single or double-row female/socket headers. These machined female headers together with their male counterpart are used in connecting Arduino boards and shields. 2.54mm pitch machi...
 
                    ... to 12VDC rather than 3.0-6.0V. Since you are more likely to have 5 or 9V available than a high current 3V setting, this range makes them ideal for controlling with an Adafruit Motor Shield or an Arduino. Mo...
 
                    5V One 1 Channel Relay Module Board Shield For PIC AVR DSP ARM for arduino Relay power supply module Product Description: The relay coil drive voltage is 5V, and the input control level can also be within 5V. O...