Scratch Robots Motor Controller Motor Controller Circuit Board

Scratch Robots Motor Controller

Motor Controller Circuit Board When the light sensor sees black, the motor is OFF. When the light sensor sees white, the motor is ON Radio Shack Parts $ 9. 00 – 1 -1/8” Modular IC Breadboard $ 2. 00 - IRF 510 N-channel MOSFET $ 3. 00 - Photo Resistors $ 3. 00 - 22 Gauge Hookup Wire $ 1. 50 - 10 K Potentiometer $ 3. 00 - 9 V connector $ 2. 50 - 9 V battery -------------$24. 00 - Total www. build-it-yourself. com

Scratch Robots MOSFET Motor Controller Tools Radio Shack Tools $ 9. 00 – Test Jumpers $ 3. 00 – Screw driver $ 7. 00 – Wire Strippers $ 20. 00 – Multimeter -------------$39. 00 - Total www. build-it-yourself. com

Scratch Robots MOSFET Motor Controller +6 V to 9 V R 1 Photo resistor 2 K Ohms light (on) 50 K Ohms dark (off) 5 V to 9 V DC Motor 1 A G R 2 10 K D S www. build-it-yourself. com

Scratch Robots MOSFET Motor Controller +6 V to 9 V R 1 Photo resistor 2 K Ohms light (on) 50 K Ohms dark (off) 5 V to 9 V DC Motor 1 A G R 2 10 K D S Q 1 IRF 510 N-channel MOSFET 2 V-4 V GS trigger voltage 20 V GS Max voltage 4 A DS current G – Gate D – Drain S – Source If the voltage between the Gate and Source of this N-channel MOSFET is < 2 volts, no current can flow between the Drain and Source terminals. The motor will not run. If the Gate to Source voltage is > 4 volts, then current will flow between the Drain and Source and the motor will run. Adjust R 2 so motor is off when R 1 sees no light. The Gate voltage should be < 2 volts. When R 1 sees light, its resistance should decrease raising the Gate voltage > 4 volts. Then the motor will run. www. build-it-yourself. com Radio Shack Breadboard MOSFET On/Off Controller Build-It-Yourself

Scratch Robots MOSFET Motor Controller Voltage Divider (FET Gate Bias Control) 9 V R 1 Photo Resistor VG VG R 2 9 V = R 1+R 2 VG 10 K = 9 V 4 K(light)+10 K VG = 6. 4 V R 2 Variable Resistor VG = 9 V 10 K 16 K(dark)+10 K VG = 3. 4 V www. build-it-yourself. com