Brand N/A Model NE555 Quantity 1 Color Blue Material Plastic + iron Specification Size: 3.5cm x 3.6cm; Main chip: NE555; Input voltage: 5V~15V Features It is used as a square wave signal generator to enerate a square wave signal for experimental development use; For generating drive a stepper motor drive of the square wave signal; Adjustable pulse generated for the use of MCU; Generated adjustable pulse to control related circuit; Output amplitude: 4.2V V-PP to 11.4V V-PP (Input voltage differs the output amplitude); Maximum output current: 15mA (5V power supply V-PP more than 50%) 35mA (12V power supply V-PP more than 50%) Application Great for DIY project English Manual/Spec Yes (Download Address: http://pan.baidu.com/share/link?shareid=549244&uk=11612480) Other With output indicator: LED on when low level LED off when high level LED flashed when low frequency; Output levels of frequency range is selectable which is benefit for output frequency is continuously adjustable; LF level: 1Hz~50Hz; IF level: 50Hz~1kHz; High frequency level: 1KHz~10kHz; HF level: 10kHz~200kHz Packing List 1 x Module User Manual: http://m5.img.dxcdn.com/CDDriver/CD/sku.232460.rar