Motor Controller circuits

• 12 Volt Differential Temperature Controller
• 35KHz Magnetic-Radiation Remote-Control
• 4 Digit Keypad Switch
• 4-bit receiver for DC motor control
• 555 Based Simple Servo Controller
• 556 Timer Stall-Motor Switch Machine Drivers
• 5A H-bridge motor driver based on TIP122 / TIP127 power transistors
• 6090 digital decoder schematics
• 9V Xenon photoflash controller (PDF)
• A Simple Repeater Fan Controller (PDF)
• AC Motor Speed Controller
• AC switching with TRIAC from TTL
• Assorted relay control circuits
• Audio Signal Detecting Auto Power-On Unit
• Bipolar stepper motor driver based on 74194 chip
• Bridge head
• Brushless DC electric motor control by CPLD
• Charge coupled bi-directional power MOSFET relay (PDF)
• Clap activated remote control
• CMOS control voltage for firing Crydom Soft-Start Motor Module
• CO2 controller for planted tanks
• Constant Temperature Circuit
• Constant Temperature Circuit
• Control 120VAC relay with TTL
• Current loop interface
• Dark activated switch
• DAS1 - 12 Volt 10 Amp Dark Activated Switch
• DC Motor Control Circuit
• DC Motor Controller using 74 series chips
• DC Motor Driver with L6203
• DC Motor Reversing Circuit
• DC Motor-Driver H-Bridge Circuit
• DC Push Button Motor Control Circuit
• Delayed Power Circuit using an SCR
• Digital logic controller
• DIY Power Pulse Controller
• Driving a relay with a CPU
• DS1821 programmable thermostat
• Dual Stepping motor drivers using UDN2540
• Electric heater thermostat
• Electronic circuit diagram of cell phone SMS remote control device
• Electronic Control for DC Motors Using Discrete Bridge Circuits (PDF)
• Fan control based on a TL082 opamp and IRF510 power MOSFET
• FAN Thermostat controlled by IR remote controller
• Finger touch activated switch (PDF)
• GSM SMS javljalnik ALSMS-01 (page in slovenian )SMS remote control project
• H Bridge controller for DC motors
• H Bridge Motor Control Circuits
• H-Bridge Circuit
• H-Bridge Motor Driver Using Bipolar Transistors
• Heating System Thermostat
• High And Low Voltage Cut Off With Time Delay
• High and Low Voltage Cutout with delay and Music
• High current PWM controller based around a 555 timer
• HIGH or LOW Power Switch For Lights or Small Motors
• Home Automation Over Internet
• Homemade Water Drain Pump controller
• Hot Water Tank Level Indicator
• How to Make a PWM Circuit without a Microcontroller
• LDR light/dark activated relay switch
• Light / dark activated relay
• Light detector
• Light Operated Switch
• Light switch using LDR
• Light/dark detector
• Light/Dark Detector drives a relay
• Line-powered Xenon flash transmitter (PDF)
• Machine vibration triggers hour meter (PDF)
• Mains Power Load Sensing Automatic Switch
• Micro-step driver - connect a bipolar steppe motor to a PC through the parallel port
• Microstepping with PBM3960 and TEA3718
• Modular relay system
• MOSFET based speed controller uses 9 IRFZ40 power MOSFETS
• MOSFET H-BRIDGE schematic and theory
• Motor speed controllers
• MotorDriver V1.0 - Dual DC Motor Driver Board (LMD18200T based, 55V 3A, 6A peak) - PDF
• No-Hum Fan Controller
• NPN transistor circuit for relay control (relay driver)
• One component stepper motor driver
• Optically isolated stepper motor controller
• Optically isolated TRIAC driver
• Over / Under Voltage Cut-Out
• PA fan temperature controlled speed motor speed controller
• Pulse width modudulator using 555 timer IC
• Pulse Width Modulation DC Motor Control
• Pulse Width Modulation DC Motor Controller
• Push Button Motor Control Circuits
• Pushbutton one-shot and latch (PDF)
• PWM DC motor control with SG3525
• PWM DC Motor Speed Control
• PWM motor controller
• PWM Motor Speed Controller / DC Light Dimmer
• PWM Motor Speed Controller / DC Light Dimmer
• PWM Motor/Light Controller circuit diagrams
• Radio Remote Control using DTMF
• Relatively simple thermostat circuit diagram
• Relay circuit for relay control via an RS232 port
• Relay circuit using 74LS573 to driver 5V DC relays
• Relay controller based on Microchip PIC16F84 (PDF)
• Remote Motor Controller
• Rolling code 4-channel UHF remote control
• Safe Universal Mains Switching Box
• Selection of PWM driver circuits for electric DC motors
• Serial servo controller
• Several stepper motorol control circuits
• Shadow activated (or hand wave) motion detector
• Simple 120 VAC motor speed controller based on a TRIAC
• Simple keypad operated switch
• Simple Servo Controller using 555 Timer
• Simple temperature regulated FAN speed controller
• Simple Two Speed Contactor DC Motor Controller
• Smart switch, short press for on, longer press to turn off
• Solenoid starter
• Solid state relay (PDF)
• Solid-state power controller
• Sound operated switch
• Stepper motor controller
• Stepper motor controller
• Stepper Motor Controller using 4027 flip-flop and 4070 XOR gate
• Stepper Motor Driver using L298 and L297
• Stepper motor driver using PIC12F675
• Stepper motor driver using PIC12F675 that offers serial port command interface
• Stepper Motor Driver using TEA3718/3717
• Stepper motor positioner
• Switching solenoid driver
• Temperature monitor using 741 opamp
• Thermal cooling fan controller
• Thermo-Fan to keep your amplifier or other equipment cool
• Three electronic circuit diagrams for thermal controllers including linear and PWM control
• Time Delay Relay
• Time Delay Relay II
• Touch switch
• Touch switch based on CD4011 flip-flop
• Touch Switch using 4011 CMOS NAND Gate IC
• Touch Switches
• Unipolar stepper motor driver based on 74194 chip
• Variety of simple motor control circuit diagrams using SCR or TRIAC
• Voice activated switch using MC2830
• Voltage comparator switch
• Water Detector With Sump/Bilge Pump Controller
• Water system controller (PDF)
• Wireless RF PWM dual motor controller