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  • Low-Cost DC Motor Speed Control with CMOS ICs
    Two low-cost CMOS ICs manage a 12 VDC, current-limited speed control circuit for DC brush motors. The circuit design (see Figure 1) uses PWM (pulse width modulation) to chop the effective input voltage to the motor. Use of CMOS devices gives the benefits of low power, minimal heat and improved
  • Linear Voltage Fan Speed Control Using Microchip's TC64X Family
    Pulse Width Modulation (PWM) fan speed control methodology pulse-width modulates a fan's full-rated power supply voltage at a low frequency, typically 30 Hz. A typical PWM circuit, consisting of a transistor in series with a fan, can be small and inexpensive because it is either fully
  • Jog Circuit for the SP500 Drive: Setup and Configuration
    below. A. Jog with a pushbutton (3-wire) start-stop. (All devices are usersupplied) Selecting jog by an externally supplied switch will effectively turn the start pushbutton into a jog pushbutton. Jog speed will be the most recent set reference. B. Jog function with a 2-wire start-stop circuit
  • The basics of pneumatic control valves
    Directional valves such as Parker Hannifin's B3G-Series threeway (left) and four-way valves are often used to control pneumatic operations. Directional-control valves are vital in any pneumatic circuit, directing or blocking airflow to control the speed or sequence of operations. One method
  • Basics of MOSFETs and IGBTs for Motor Control
    Today's motors are increasingly driven via electronic controls, which offer better control of speed, position, and torque, as well as much greater efficiency, rather than via direct connection to their source of power (whether AC or DC). To do this, the motor-control circuit must switch the current
  • Taking the Guesswork Out of Pneumatic Control
    systems are often a good bet when a compact, economical unit is a must. They typically consist of a series of valves mounted onto standard manifold subplates. Such systems speed assembly and piping, and all interconnections between valves and controls in the circuit are machined into the manifold
  • A Simple Circuit for Driving Microcontroller Friendly PWM Generators
    for designing a switching power supply as a peripheral to a microcontroller: a set/reset flip-flop, a high-speed voltage comparator and an op amp to implement the error amplifier. The microcontroller controls the MCP1630 through its clock input. The frequency of the clock determines the pulse
  • Modular Air Bearings for Motion Control
    for circuit-board drilling and waferdicing spindles because of their capability for working at high speeds. Recently a type of air bearing called a modular-radial air bearing has become more widely available. These devices were once generally created only for custom orders. Today, they are standard products
  • Application Note - 3 Set Speeds of Operation
    DART CONTROLS DC motor speed controls can be configured for field selectable 3 set speeds of operation by connecting a. switch in the potentiometer circuit. The 3 set speeds are as follows: Valid For Models: Any DART CONTROLS motor. control with an adjustable speed. potentiometer. SCR Series: 500

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