3 Channel Capacitive Touch Sensor with I2C

3 Channel Capacitive Touch Sensor with I2C

The project described here is a 3 channel capacitive touch sensor based on CAP1203 chip from Microchip which is a multiple-channel capacitive touch sensor controller. It has 3 x individual capacitive touch sensor inputs with programmable sensitivity for use in touch sensor...

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Precision Thermocouple Amplifier (Thermocouple to Digital Converter with Linearization – SPI Interface)

Precision Thermocouple Amplifier (Thermocouple to Digital Converter with Linearization – SPI Interface)

This precision thermocouple sensor module performs cold-junction compensation and digitizes the signal from any type of thermocouple. The output data is formatted in degrees Celsius. The converter resolves temperatures to 0.0078125°C, allows readings as high as +1800°C and as low as...

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1.544
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Humidity Meter Using OLED Display – Arduino Compatible

Humidity Meter Using OLED Display – Arduino Compatible

This is an easy to build, very compact, and low profile Arduino compatible platform to build a humidity meter/Gauge using a 0.96Inch OLED display. The project consists of Atmega328 microcontroller, 0.96Inch OLED display, 3.3V regulator, and HIH5030 analog humidity sensor from...

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1.766
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Humidity Sensor – Humidity to Frequency Output

Humidity Sensor – Humidity to Frequency Output

This sensor board provides frequency output as per relative humidity value. The project is based on a unique capacitive cell, this relative humidity sensor is designed for high volume, cost-sensitive applications such as office automation, automotive cabin air control, home...

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1.158
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Automatic LED Stairway Lighting – Arduino Compatible

Automatic LED Stairway Lighting – Arduino Compatible

This creative idea is suitable for a stairway with 16 stairs, each stair can have a 12V LED. It has two sensors one at the start and one at the end of the stairs and when the sensor trigered at any end it starts a process of lighting each of the steps in a progressive cycle starts....

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3.135
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Analog Light Sensor + Light Sensitive Switch using OPT101

Analog Light Sensor + Light Sensitive Switch using OPT101

You may have seen many light-sensitive switch circuits based on an LDR sensor. Usually, the sensitivity of the LDR based light sensor is poor. We wanted a very sensitive light switch hence we decided to make a circuit based on a light sensor rather than LDR. After a little research on...

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4.166
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Liquid or Air Pressure Switch with Relay

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...

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3.581
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Strain Gauge Sensor Amplifier or Single Supply Instrumentation Amplifier

Strain Gauge Sensor Amplifier or Single Supply Instrumentation Amplifier

This is a new project, a single supply instrumentation amplifier with onboard bridge configuration, and a 2.5V precision reference voltage chip. The project can be configured for applications such as thermocouple amplifier, bridge amplifier, ECG amplifier, pressure sensors, medical...

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4.261
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