With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.
We have a be nice comment policy. Please be positive and constructive.
We noticed you attached photosto your comment.
This is only possible if the motor draws a CONSTANT KNOWN amperage. Say for example the motor draws 500milliamperes (that's half an amp or 0.5A.) Ohms law says the resistance would be R=Volts divided by amps. so 3v divided by 0.5A = 6ohms. So you would need a 6 ohm resistor in series with the motor. HOWEVER, motors use various amounts of amperes depending on the strain on the motor. so you cant really do that with a resistor. However... if you are using a SMALL motor that doesn't use much milliamperes, then you could place a ZENER DIODE in series with the motor. Get a 3.1 volt zener diode. connect it in series with the motor. You must connect the zener diode with proper polarity with respect to the positive battery... One side of the zener diode has a striped end. Connect that striped end to the plus wire. The other end of the zener goes to the plus of the motor. If you connect the zener backwards, then you will only reduce the voltage going to the motor by about 0.7 Volts.
Creating a Simple Direct Current Electric Motor - Masco G44
How To WIRE Washer Machine Electric Motor
Protect Your Electric Motors (Arduino Soft Starter)
Complete Motor guide for Robotics
Control Nema Stepper Motor With Arduino And Micro stepping Drive
Arduino + L298 motor driver integrated
DC Motors Tutorial-1/3: Continuous, H-Bridge, Gear
R Jordan Kreindler
Quick and easy "electric linear actuator" prototype ...
Electric power from dc motor as a dc generator
Posted:Apr 22, 2010
Let your inbox help you discover our best projects, classes, and contests. Instructables will help you learn how to make anything!
© 2016 Autodesk, Inc.