There are 119 circuit schematics available in this category. Click here for all circuit diagrams. The Last circuit was added on Saturday, January 28, 2023.Please note some adblockers will suppress the schematics as well as the advertisement so please disable if the schematic list is empty.

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CircuitCategoryDate AddedOK?Votes 
Bridge headControlAug 14, 2024Status-6 vote up vote down
PWM motor controllerControlJun 06, 2024Status0 vote up vote down
Delayed Power Circuit using an SCRControl Status3 vote up vote down
H-Bridge CircuitControl Status0 vote up vote down
High current PWM controller based around a 555 timerControlSep 23, 2024Status-1 vote up vote down
Relatively simple thermostat circuit diagramControlSep 23, 2024Status-1 vote up vote down
Electric heater thermostatControlSep 23, 2024Status-2 vote up vote down
Making a bistable from a normal relay, based on coil hysteresisControlJul 21, 2024Status-2 vote up vote down
Two-button control for dangerous machinesControlOct 05, 2024Status1 vote up vote down
MOSFET based H-Bridge controller for DC motorsControlMar 17, 2024Status4 vote up vote down
Clap operated remove control for fansControlDec 07, 2024Status0 vote up vote down
Presure based hit switchControlDec 07, 2024Status-1 vote up vote down
Light switch using LDRControlJun 26, 2024Status-3 vote up vote down
Heating System ThermostatControlJun 26, 2024Status-2 vote up vote down
Touch switch based on CD4011 flip-flopControlJun 26, 2024Status-2 vote up vote down
DC Motor Control CircuitControl Status2 vote up vote down
Fan control based on a TL082 opamp and IRF510 power MOSFETControl Status-2 vote up vote down
Simple 120 VAC motor speed controller based on a TRIACControl Status-4 vote up vote down
Electronic Control for DC Motors Using Discrete Bridge Circuits (PDF)Control Status0 vote up vote down
Digital Encoder Circuit Using Stepper MotorControlJan 08, 2025Status3 vote up vote down
Various CNC mill circuit diagrams and other DIY CNC mill informationControlJun 17, 2024Status-1 vote up vote down
H Bridge Motor Control CircuitsControlJun 09, 2024Status-3 vote up vote down
Unipolar and bipolar stepper motor driver circuits using 74194 and ULN2803ControlNov 04, 2024Status-1 vote up vote down
HIGH or LOW Power Switch For Lights or Small MotorsControlSep 10, 2024Status-1 vote up vote down
Push Button Motor Control CircuitsControlSep 10, 2024Status0 vote up vote down
Motor speed controllersControlJun 17, 2024Status-1 vote up vote down
GSM SMS javljalnik ALSMS-01 (page in slovenian )SMS remote control projectControlOct 07, 2024Status-1 vote up vote down
Variety of simple motor control circuit diagrams using SCR or TRIACControlFeb 20, 2025Status-1 vote up vote down
Dremel drill speed controllerControlMay 16, 2024Status0 vote up vote down
PWM Heater fan controller based on PIC12F675ControlMay 24, 2024Status-1 vote up vote down
Audio Signal Detecting Auto Power-On UnitControlMar 30, 2024Status1 vote up vote down
Mains Power Load Sensing Automatic SwitchControlMar 30, 2024Status-1 vote up vote down
Thermo-Fan to keep your amplifier or other equipment coolControlMar 30, 2024Status-1 vote up vote down
Current loop interfaceControlAug 12, 2024Status-1 vote up vote down
AC Motor Speed ControllerControlSep 01, 2024Status-1 vote up vote down
Simple Two Speed Contactor DC Motor ControllerControlSep 01, 2024Status0 vote up vote down
Light/Dark Detector drives a relayControlSep 01, 2024Status-1 vote up vote down
Pulse Width Modulation DC Motor ControllerControlSep 01, 2024Status-1 vote up vote down
Water Detector With Sump/Bilge Pump ControllerControlSep 01, 2024Status-1 vote up vote down
Time Delay RelayControlSep 01, 2024Status-1 vote up vote down
Time Delay Relay IIControlSep 01, 2024Status1 vote up vote down
Simple Servo Controller using 555 TimerControlSep 01, 2024Status-3 vote up vote down
Stepper Motor Controller using 4027 flip-flop and 4070 XOR gateControlSep 01, 2024Status-1 vote up vote down
Touch Switch using 4011 CMOS NAND Gate ICControlSep 01, 2024Status-2 vote up vote down
Stepper motor driver using PIC12F675 that offers serial port command interfaceControl Status0 vote up vote down
Stepper motor driver using PIC12F675Control Status-1 vote up vote down
H-Bridge Motor Control with Power MOSFETSControlMar 23, 2024Status-1 vote up vote down
Simple temperature regulated FAN speed controllerControl Status-1 vote up vote down
Shadow activated (or hand wave) motion detectorControl Status-1 vote up vote down
Pushbutton one-shot and latch (PDF)ControlJan 26, 2025Status-1 vote up vote down
Charge coupled bi-directional power MOSFET relay (PDF)ControlJan 26, 2025Status-1 vote up vote down
Finger touch activated switch (PDF)ControlJan 26, 2025Status1 vote up vote down
Machine vibration triggers hour meter (PDF)ControlJan 26, 2025Status-1 vote up vote down
Solid state relay (PDF)ControlJan 26, 2025Status-1 vote up vote down
Line-powered Xenon flash transmitter (PDF)ControlJan 26, 2025Status0 vote up vote down
9V Xenon photoflash controller (PDF)ControlJan 26, 2025Status-1 vote up vote down
Op Amp based PID Controller circuit with SPICE simulationControlMar 26, 2024Status-2 vote up vote down
No-Hum Fan ControllerControlSep 13, 2024Status-1 vote up vote down
Clap activated remote controlControl Status-1 vote up vote down
Light Operated SwitchControl Status-1 vote up vote down
Optically isolated stepper motor controllerControlFeb 21, 2025Status-1 vote up vote down
Stepper motor positionerControlJan 26, 2025Status-1 vote up vote down
555 Based Simple Servo ControllerControl Status1 vote up vote down
H Bridge controller for DC motorsControl Status0 vote up vote down
Water system controller (PDF)Control Status-1 vote up vote down
DS1821 programmable thermostatControlMar 01, 2025Status-1 vote up vote down
LDR light/dark activated relay switchControlJun 17, 2024Status-1 vote up vote down
Touch SwitchesControlJan 26, 2025Status-1 vote up vote down
6090 digital decoder schematicsControlOct 30, 2024Status-2 vote up vote down
Smooth, fast, strong and cheap stepper motor controller using a PIC microControlNov 04, 2024Status-1 vote up vote down
Selection of PWM driver circuits for electric DC motorsControlNov 05, 2024Status-1 vote up vote down
Arduindo based Appliance Remote ControlControlJun 20, 2024Status-1 vote up vote down
Remote Motor ControllerControl Status-1 vote up vote down
Assorted relay control circuitsControlMar 18, 2024Status-2 vote up vote down
Thermal cooling fan controllerControl Status-1 vote up vote down
DIY Power Pulse ControllerControl Status-1 vote up vote down
H-Bridge Motor Driver Using Bipolar TransistorsControlAug 12, 2024Status-3 vote up vote down
Dual fan controller using ATTiny45 microcontrollerControlNov 02, 2024Status-1 vote up vote down
DC Motor-Driver H-Bridge CircuitControlJun 09, 2024Status-1 vote up vote down
How to Make a PWM Circuit without a MicrocontrollerControlAug 12, 2024Status-1 vote up vote down
Optically isolated TRIAC driverControlAug 17, 2024Status-1 vote up vote down
Light / dark activated relayControlJan 26, 2025Status-1 vote up vote down
Pulse width modudulator using 555 timer ICControlAug 03, 2024Status-2 vote up vote down
Constant Temperature CircuitControlSep 21, 2024Status-1 vote up vote down
PWM Motor Speed Controller / DC Light DimmerControlSep 07, 2024Status2 vote up vote down
PWM Motor/Light Controller circuit diagramsControlSep 07, 2024Status-1 vote up vote down
12 Volt 10 Amp Dark Activated Switch (kit available)ControlJun 18, 2024Status-1 vote up vote down
DAS1 - 12 Volt 10 Amp Dark Activated SwitchControlSep 07, 2024Status-1 vote up vote down
12 Volt Differential Temperature ControllerControlSep 07, 2024Status-1 vote up vote down
PWM Motor Speed Controller / DC Light DimmerControlNov 17, 2024Status-1 vote up vote down
Constant Temperature CircuitControlJan 26, 2025Status-1 vote up vote down
PWM DC Motor Speed ControlControlJan 26, 2025Status-1 vote up vote down
CO2 controller for planted tanksControlJan 26, 2025Status0 vote up vote down
Relay circuit for relay control via an RS232 portControl Status-1 vote up vote down
Micro-step driver - connect a bipolar steppe motor to a PC through the parallel portControl Status0 vote up vote down
PA fan temperature controlled speed motor speed controllerControl Status-2 vote up vote down
Homemade Water Drain Pump controllerControl Status-1 vote up vote down
Dual stepper motor drivers using UDN2540ControlJul 03, 2024Status-1 vote up vote down
PWM DC motor driver and control with SG3525ControlJul 03, 2024Status-2 vote up vote down
Hot Water Tank Level IndicatorControlNov 27, 2024Status-1 vote up vote down
Temperature monitor using 741 opampControlJan 26, 2025Status-1 vote up vote down
Voltage comparator switchControlJan 26, 2025Status-1 vote up vote down
Dark activated switchControlJan 26, 2025Status0 vote up vote down
Light detectorControlJan 26, 2025Status1 vote up vote down
DC Motor Reversing CircuitControlNov 27, 2024Status0 vote up vote down
Sound operated switchControlJan 26, 2025Status0 vote up vote down
4 channel RF remote controlControlJun 28, 2024Status1 vote up vote down
Remote-Controlled Fan RegulatorControlJul 30, 2024Status0 vote up vote down
Automatic Room Power ControlControlJul 30, 2024Status0 vote up vote down
Gentle breeze fan controllerControlJul 30, 2024Status0 vote up vote down
Automatic Range HoodControlJul 30, 2024Status-1 vote up vote down
Automatic Water Tank Filler Circuit DiagramControlJul 30, 2024Status0 vote up vote down
Heating System Thermostat CircuitControlJul 30, 2024Status2 vote up vote down
Dual Relay Driver Board Circuit SchematicControlOct 06, 2024Status1 vote up vote down
RX/TX 27 MHz Wireless Remote ControlControlOct 02, 2024Status1 vote up vote down
3-Tones Controlled RelayControlOct 02, 2024Status0 vote up vote down
Build an On/Off Motor Controller with BrakeControlOct 15, 2024Status0 vote up vote down
Air-Speed Sensor for Cooling FanControlOct 20, 2024Status0 vote up vote down
Fan Speed Temperature Controller - DH8AGControlOct 20, 2024Status2 vote up vote down