Optically Isolated Analog Input Module for Arduino
Arduino

Optically Isolated Analog Input Module for Arduino

This is an isolated analog input module that is useful for interfacing Analog signals of various types originated from analog sensors and field devices. The module is very useful for in-process controls, factory automation, industrial applications, etc. Interfacing an analog voltage, an...

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Liquid or Air Pressure Switch with Relay
Sensor

Liquid or Air Pressure Switch with Relay

This pressure switch project is built using a piezoresistive transducer, LM358 OPAMP as comparator, and a relay. The circuit activate the relay when the pressure in a system exceed a given set-point. Basically, this switch can power ON or OFF a pump, valve, motor, when certain pressure...

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1073
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Sound Sensor with onboard Relay Arduino Nano Shield
Arduino

Sound Sensor with onboard Relay Arduino Nano Shield

This sound sensor with Relay driver shield for Arduino Nano can be used to develop sound-activated ON/OFF switch or other projects that require sound senor. LM358 op-amp is used as the amplifier, 1st op-amp amplifies the microphone signal, and 2nd op-amp works as a half-bridge rectifier...

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1608
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Use a Comparator or Op-Amp to Simplify Light Dependent Resistor Output
ArduinoBasic Electronics

Use a Comparator or Op-Amp to Simplify Light Dependent Resistor Output

If your project calls for light sensitivity, it’s hard to beat light dependent resistors (LDRs), also known as photoresistors. They’re available for a few cents each, and their resistance varies based on how much light they receive. In the dark, these devices produce resistances in...

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8145
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Current Sensor Amplifier & Over Current Switch
Sensor

Current Sensor Amplifier & Over Current Switch

Current sensor amplifier and over current switch project is based on ACS714-30A current sensor and LM358 Op-amp, ½ of  LM358 op-amp used as an amplifier for low voltage  and 2nd 1/2 LM358 op-amp used as comparator which provides over current TTL output, trimmer potentiometer...

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3704
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Simple Pressure Sensor Amplifier & Over Pressure Switch
Sensor

Simple Pressure Sensor Amplifier & Over Pressure Switch

The pressure sensor amplifier built using LM358 op-amp and MPXM2051GS pressure sensor from NXP semiconductor.  The circuit provides 4V output for full scale pressure input 0-7.5PSI.  One op-amp is used as amplifier and 2nd op-amp is used as comparator to provide an output at set...

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4190
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Heat Activated Cooling Fan Controller
Sensor

Heat Activated Cooling Fan Controller

Heat activated cooling fan controller is a simple project which operates a brushless fan when the temperature in a particular area goes above a set point, when temperature return normal, fan automatically turns off. The project is built using LM358 Op-amp and LM35 temperature Sensor....

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4977
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Sound to Light Effect
Audio

Sound to Light Effect

This project will turn your favorite music into light effects, a microphone picks up the sound and gives  light effects with 6 Red LEDs, ideal for creating fun atmosphere at parties & discos. Supply 9V-12V DC. Features Supply 9V-12V DC (PP3 9V Battery) On Board Preset...

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3586
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