Check the listing for details. Velleman K8004 DC to Pulse Width Modulator Kit - Control DC Motors. Condition: New. Listed at 22.95 USD. DC to Pulse Width Modulator KitThe circuit converts a DC voltage into a series of pulses, such that the pulse duration is directly proportional to the value of the DC voltage. In the Circuit Skills video below, Colin Cunningham explains the basic principles of Pulse Width Modulation and the variety applications where PWM can be used. Specifications: Expert level 40 Pieces PWM range: 0 to 100% PWM frequency: 100Hz to 5kHz (adjustable) Operating voltage: 8 to 35VDC Minimum consumption: 35mA Maximum output current 6.5A Efficiency: better than 90% at full load Adjustable sensitivity: 2.5 to 35VDC Size: 3.3"L x 1.9"W x 1.8"H Weight: 0.5 lbs. Check out more fun and exciting electronic kits Detailed specifications Design Level: Beginner Kit