Controller Circuits

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Controller circuits

Water Level Controller Circuit using Transistor and Relay

Water Level Controller Circuit

This simple Water level controller circuit is useful to control the water level in a tank. It does this by turning On and Off a water pump depending on the status of the sensors.

Thermistor Controlled Fan Circuit – AC Fan

Thermistor controlled fan circuit

This circuit varies the speed of a fan connected to a 110 or 220 Volts outlet, using just three transistors and a few additional components.

DC Motor Speed Control with 4049

DC motor speed control with 4049 (PWM)

This DC motor speed control with 4049, is a circuit that allows varying the speed of small DC motors of 3 or 6 Volts that are often found in toys or small electronic devices.

DC motor speed controller circuit using 555

This simple DC motor speed controller circuit, works with 12 volts and controls a DC motor using the 555 integrated circuit.

Water level controller circuit using CD4001

This water level controller circuit controls the level of water in a tank. Unlike mechanical controls using a floating buoy, this circuit uses two sensors, an upper sensor and a lower sensor,

Dimmer / AC Motor Speed Controller Circuit using TRIAC

Dimmer / AC Motor Speed Controller Circuit

Dimmer / AC motor speed controller. Very simple circuit that can control the speed of an AC motor or a room light level of a room using a TRIAC

Soldering Iron Temperature Controller (TRIAC – DIAC)

Soldering Iron Temperature Controller (circuit)

Very simple soldering Iron temperature controller system You can do by yourself. It uses very few components. Ideal for DIY projects and circuits

Electronic Thermostat Circuit using transistors

Electronic Thermostat Circuit using transistors.

This circuit allows us to control the temperature of a room, turning a heating device On and Off. Very useful in winter and in very cold places.

H-Bridge DC Motor Control Circuit

H-Bridge DC Motor Control circuit

This circuit enables us to apply voltage to a DC motor in either direction (Forward or Backward) ausing a control circuit.

Automatic Water Level Controller Circuit

Automatic Water Level Controller circuit

This circuit ensures that an elevated tank always has enough amount of water. Perfect for 2 or more stories buildings or houses

Differential Temperature Controller (PCB)

Differential Temperature Controller.

This circuit measures the temperature difference between 2 sensors and activates a relay when they are different. It is also possible to detect a temperature change, even when the two measured temperatures are normally different.

Heat control using thermistor and TRIAC

This Heat control using thermistor and TRIAC circuit, is designed to control the temperature of a room, either by using a heat source such as an electric oven heating element or by using a fan or any cooling device