ElectroSuite.com - PWM motor speed controller TIP 122 is using a different component to control the speed of the 12V fan or motors using Pulse Width Modulation (PWM). The TIP-122 are Darlington transistors that can support voltage up to 100V. It consist of two transistors with resistors and diode all inside a TO-220 package.
ElectroSuite.com - Music Driven Motor Schematic. The geared motor drive the stem of a dancing flower to beat of music. Motor current draw is : 35mA = no-load, 400mA = stalled, 70mA = Flower-Continuous-run.
ElectroSuite.com - DC Motor Controller and Tachometer. The purpose of the speed controller is to vary the speed of the motor. The name “speed controller” is somewhat of a misnomer.
ElectroSuite.com - Electrical Motor Control Circuits CBT. The Troubleshooting Electrical Motor Control Circuits CBT, you will troubleshoot a motor control circuit consisting of a reversing motor controlled garage door. These fault simulation CDs have instructor resources available too.
ElectroSuite.com – H Bridge Motor Driver Using Bipolar Transistors. H-bridge is an arrangement of transistors that allows a circuit full control over a standard electric DC motor.
ElectroSuite.com – EM7068T AC Motors Explosion Proof. Ideal for wide variety of applications where hazardous fumes or dust may be present.
EM7068T AC Motors Explosion Proof – Baldor.com
This is DC Motor Controller using Transistor 2N3053 and 2N3055, as a function for controlling the speed of DC Motor by setting the bias voltage supply of the DC Motor.
It can be used to controll the speed of 12 V DC Motor, the source voltage for this circuit is 15 Volt.