SMAKN&reg; Square Wave Signal Generator Module Function Generator Module for Arduino new size: 3.3 CM * 2.4 CM the input voltage: 3.3 V to 12 VDC.5 v power supply, the output current can be around 15 ma;The 12 v power supply, the output current can be around 35 ma; input current: p 100 ma output voltage, and power input voltage