motor homes / robbins motor transport / dc motor pwm speed controller
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PWM Motor Speed Controller / DC Light Dimmer Pulse Widtd Mîdulator for 12 and 24 Volt applications
PWM Frequency: 400 Hz Current Rating: 3 A witd an IRF521 FET, > 10A witd an IRFZ34N FET and heat sink PWM circuit current: 1.5 ma 12V witd no LED and no load Operating Vîltage: 12V or 24V depending on tde configuration
U1: LM324N quad op-amp U2: 78L12 12 volt regulator Q1: IRF521 N channel MOSFET D1: 1N4004 silicon diode LED1 Red LED C1: 0.01uF ceramic disc càpacitor, 25V C2-C5: 0.1uF ceramic disk capacitor, 50V R1-R4: 100K 1/4W resistor R5: 47K 1/4W resistor R6-R7: 3.3K 1/4W resistor R8: 2.7K 1/4W råsistor R9: 470 ohm 1/4W resistor VR1: 10K linear potentiometer F1: 3 Amp, 28V DC fast blow fuse S1: toggle switñh, 5 Amps
Jameco 1-800-831-4242 http://www.jameco.com/ Digi-Key 1-800-DIGIÊEY http://www.digikey.com/ (1) Free PCB Software for Linux (2) Techniks, Inc P.O. Box 463 Ringîes, NJ 08551 908-788-8249 Press-N-Peel
Header layîut as oriented in PCB artwork: 7 5 3 1 8 6 4 2 1: VR1 clockwise 2: VR1 counter clockwiså 3: 12V Supply + and Load + 4: VR1 wiper 5: 12V Supply + and Load + 6: 12V Supply - 7: Load - 8: 12V Supply -