There are 128 circuit schematics available in this category. Click here for all circuit diagrams. Last circuit added on Thursday, 30 July 2015.

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CircuitCategoryDate AddedOK?Votes 
Bridge headControlAug 14, 20023
PWM motor controllerControlJun 06, 20030
Home Automation Over InternetControlMar 25, 2009-1
CMOS control voltage for firing Crydom Soft-Start Motor ModuleControlMar 25, 20090
FAN Thermostat controlled by IR remote controllerControlMar 25, 20090
Delayed Power Circuit using an SCRControl 0
H-Bridge CircuitControl 0
High current PWM controller based around a 555 timerControlSep 23, 20090
Relatively simple thermostat circuit diagramControlSep 23, 20090
Electric heater thermostatControlSep 23, 20090
Making a bistable from a normal relay, based on coil hysteresisControlJul 21, 20130
Two-button control for dangerous machinesControlOct 05, 20120
MOSFET based H-Bridge controller for DC motorsControlMar 17, 20142
Clap operated remove control for fansControlDec 07, 20140
Presure based hit switchControlDec 07, 20140
Light switch using LDRControlJun 26, 20090
Heating System ThermostatControlJun 26, 2009-1
Touch switch based on CD4011 flip-flopControlJun 26, 20090
DC Motor Control CircuitControl 0
Fan control based on a TL082 opamp and IRF510 power MOSFETControl 0
Simple 120 VAC motor speed controller based on a TRIACControl 0
Electronic Control for DC Motors Using Discrete Bridge Circuits (PDF)Control 0
Digital Encoder Circuit Using Stepper MotorControlJan 08, 20140
Various CNC mill circuit diagrams and other DIY CNC mill informationControlJun 17, 20110
H Bridge Motor Control CircuitsControlJun 09, 20020
Unipolar and bipolar stepper motor driver circuits using 74194 and ULN2803ControlNov 04, 2011-1
HIGH or LOW Power Switch For Lights or Small MotorsControlSep 10, 20060
Push Button Motor Control CircuitsControlSep 10, 20060
Motor speed controllersControlJun 17, 20031
GSM SMS javljalnik ALSMS-01 (page in slovenian )SMS remote control projectControlOct 07, 20090
Variety of simple motor control circuit diagrams using SCR or TRIACControlFeb 20, 20100
Dremel drill speed controllerControlMay 16, 20100
PWM Heater fan controller based on PIC12F675ControlMay 24, 20100
Audio Signal Detecting Auto Power-On UnitControlMar 30, 20101
Mains Power Load Sensing Automatic SwitchControlMar 30, 20100
Thermo-Fan to keep your amplifier or other equipment coolControlMar 30, 20100
Current loop interfaceControlAug 12, 20010
AC Motor Speed ControllerControlSep 01, 20090
Simple Two Speed Contactor DC Motor ControllerControlSep 01, 20090
Light/Dark Detector drives a relayControlSep 01, 20090
Pulse Width Modulation DC Motor ControllerControlSep 01, 20090
Water Detector With Sump/Bilge Pump ControllerControlSep 01, 20090
Time Delay RelayControlSep 01, 20090
Time Delay Relay IIControlSep 01, 20091
Simple Servo Controller using 555 TimerControlSep 01, 20090
Stepper Motor Controller using 4027 flip-flop and 4070 XOR gateControlSep 01, 20090
Touch Switch using 4011 CMOS NAND Gate ICControlSep 01, 20090
Stepper motor driver using PIC12F675 that offers serial port command interfaceControl 0
Stepper motor driver using PIC12F675Control 0
H-Bridge Motor Control with Power MOSFETSControlMar 23, 20150
Simple temperature regulated FAN speed controllerControl 1
Three electronic circuit diagrams for thermal controllers including linear and PWM controlControl 0
Shadow activated (or hand wave) motion detectorControl 0
Pushbutton one-shot and latch (PDF)ControlJan 26, 20010
Charge coupled bi-directional power MOSFET relay (PDF)ControlJan 26, 20010
Finger touch activated switch (PDF)ControlJan 26, 20010
Machine vibration triggers hour meter (PDF)ControlJan 26, 20010
Solid state relay (PDF)ControlJan 26, 20010
Line-powered Xenon flash transmitter (PDF)ControlJan 26, 20010
9V Xenon photoflash controller (PDF)ControlJan 26, 20010
Op Amp based PID Controller circuit with SPICE simulationControlMar 26, 20110
No-Hum Fan ControllerControlSep 13, 20060
AC switching with TRIAC from TTLControlJan 26, 20010
Control 120VAC relay with TTLControlJan 26, 20010
Driving a relay with a CPUControlJan 26, 20010
Clap activated remote controlControl 0
Light Operated SwitchControl 0
Optically isolated stepper motor controllerControlFeb 21, 20050
Stepper motor positionerControlJan 26, 20010
555 Based Simple Servo ControllerControl 0
H Bridge controller for DC motorsControl 0
DC Motor Controller using 74 series chipsControl 0
Water system controller (PDF)Control 0
Miniature Real-time Controller based on a 89C2051ControlApr 22, 20140
Circuit for soft start module for induction motorControlJun 19, 20110
Time switch with two optotriacs to control resistive AC loads directlyControlMay 19, 20150
DS1821 programmable thermostatControlMar 01, 20030
LDR light/dark activated relay switchControlJun 17, 20030
Touch SwitchesControlJan 26, 20010
6090 digital decoder schematicsControlOct 30, 20020
Smooth, fast, strong and cheap stepper motor controller using a PIC microControlNov 04, 20110
Selection of PWM driver circuits for electric DC motorsControlNov 05, 20090
Arduindo based Appliance Remote ControlControlJun 20, 20100
Remote Motor ControllerControl 0
Assorted relay control circuitsControlMar 18, 20030
Thermal cooling fan controllerControl 0
Electronic circuit diagram of cell phone SMS remote control deviceControl 0
DIY Power Pulse ControllerControl 0
H-Bridge Motor Driver Using Bipolar TransistorsControlAug 12, 20090
Dual fan controller using ATTiny45 microcontrollerControlNov 02, 20100
DC Motor-Driver H-Bridge CircuitControlJun 09, 20020
How to Make a PWM Circuit without a MicrocontrollerControlAug 12, 20090
Optically isolated TRIAC driverControlAug 17, 20090
Light / dark activated relayControlJan 26, 20010
Pulse width modudulator using 555 timer ICControlAug 03, 20090
Constant Temperature CircuitControlSep 21, 20060
PWM Motor Speed Controller / DC Light DimmerControlSep 07, 20090
PWM Motor/Light Controller circuit diagramsControlSep 07, 20090
12 Volt 10 Amp Dark Activated Switch (kit available)ControlJun 18, 20150
DAS1 - 12 Volt 10 Amp Dark Activated SwitchControlSep 07, 20090
12 Volt Differential Temperature ControllerControlSep 07, 20090
PWM Motor Speed Controller / DC Light DimmerControlNov 17, 20020
Constant Temperature CircuitControlJan 26, 20010
PWM DC Motor Speed ControlControlJan 26, 20010
CO2 controller for planted tanksControlJan 26, 20010
Relay circuit for relay control via an RS232 portControl 0
Micro-step driver - connect a bipolar steppe motor to a PC through the parallel portControl 0
PA fan temperature controlled speed motor speed controllerControl 0
Homemade Water Drain Pump controllerControl 0
Dual stepper motor drivers using UDN2540ControlJul 03, 20110
PWM DC motor driver and control with SG3525ControlJul 03, 20110
Hot Water Tank Level IndicatorControlNov 27, 20020
Temperature monitor using 741 opampControlJan 26, 20010
Voltage comparator switchControlJan 26, 20010
Dark activated switchControlJan 26, 20010
DC Push Button Motor Control CircuitControlJan 26, 20010
Light detectorControlJan 26, 20010
DC Motor Reversing CircuitControlNov 27, 20020
Sound operated switchControlJan 26, 20010
4 Digit Keypad SwitchControl 0
Simple keypad operated switchControl 0
4 channel RF remote controlControlJun 28, 20150
Remote-Controlled Fan RegulatorControlJul 30, 20150
Automatic Room Power ControlControlJul 30, 20150
Gentle breeze fan controllerControlJul 30, 20150
Automatic Range HoodControlJul 30, 20150
Automatic Water Tank Filler Circuit DiagramControlJul 30, 20150
Heating System Thermostat CircuitControlJul 30, 20151