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Best Arduino sensors - for beginners electronics projects What is Sensor? A Sensor is a device used as the primary element that measures physical value and converts it into an electrical signal. Also, we can say that the sensor is a transducer. It measures temperature, distance, light, sound, etc. Sensors and actuators widely used in Arduino projects. These sensors come with a kit or can be purchased separately. Some of them are compatible with Arduino Uno boards and also Raspberry Pi and other electronics modules. There are lots of Arduino sensors kits available in the market. How many types of Arduino Sensors? There are a lot of sensors used in electronics projects, e.g. robotics cars, moving objects, flying drones, IoT(internet of things), sound and light operated, etc. Here a list of 45 in 1 electronic sensor that comes with an Arduino sensors kit, and the details of their applications. Analog temperature Sensors KY 013 temperature sensor KY-013 is an analog temperature sensor module. It includes an NTC (negative temperature coefficient) thermistor. KY-13 used a bead-type thermistor, made with platinum and alloy materials. It can measure temperature from -55°C to +155°C. Digital temperature module Digital temperature Sensor The digital temperature sensor contains DS18B20, a digital thermometer used for measuring the temperature of any substance. Digital temperature module This is a KY-028 module used with an Arduino for temperature indication purposes. NTC thermistor is the main sensor and LM393 a dual differential comparator (use two inputs, after comparison, the larger value to be sent to output). Temperature and Humidity module This is a DHT11 sensor for temperature and humidity measurement. The range for temperature measurement is 0 to 50 ℃. Operating voltage from 3.3 to 5V DC. The humidity measuring range is 20 to 95% RH(relative humidity). Arduino IR sensor IR sensor contains infrared led (transmitter) and receiver led (photodiode). It transmits infrared light, and a photodiode detects the light. We used a potentiometer for distance adjustment. Light Dependent Resistor(LDR) LDR works on the principal photoconductivity. It is a light sensor that is used in automatic light-operated circuits. As it gets light on its surface, it generates a few electrons. Joystick Module Joystick module used in robotics projects. It has an x-axis, y-axis angle, and switch option. It is very useful for robotics arms and moving objects. Metal Touch Sensor It is a KY- 036 metal touch sensor used as a detection sensor. If a person/human body touches this sensor tip, it will trigger and generate an output. We can use a Led as an indication or buzzer for a sound alarm. It has a MOSFET(touch sensor) and LM386(amplifier). Sound sensor This is a high-sensitivity, sound sensor module. It has a condenser mic and is used for sound detection. Arduino Laser sensor Arduino laser sensors are very useful for switching projects. It's based on the detection of motion. It also comes with a transmitter and receiver. Arduino optical switch Arduino optical switch used in counting projects. It also used for interrupting devices, measuring, and counting RPM purposes. Passive buzzer sensor The passive sensor is used for beep/sound alarm for many electronic circuits. It is known as the KY-012 module. It required only low DC voltage(1.5 ~ 12) to activate. Vibration sensor A vibration sensor is a very simple module used to sense minor vibration. We can use it at the main door. Arduino Shock sensor This sensor is known as a knock sensor and a shock sensor. We used it for door-opening projects. Arduino component kit We use many electronic pieces of equipment in our routine life that may include Arduino sensors or other electronic IoT sensors and actuators. If we learn how to use them, we can understand the principle behind devices.

Hi guys,Lovely community here. So i got into the bandwagon of the ESP32. I am planning to build an entire data acquisition built around the ESP32. Would really appreciate it much if i were to get help from all of you. It would be a learning experience for all of us. So basically here are my project details and list of components being used.A 32 Channel Data acquisition system with 30 sensors measuring strain (momentarily using a metal gage strain sensor of 120Ohm being fed to a quarter bridge circuit) and 2 temperature sensors(PT100). I would like an acquisition speed of atleast 1000Samples/Sec per channel. So here is my idea as of now.32 Sensors connected to its each wheatstones bridge. The amplifier is done using the XR18910/XR10910, which is a 16:1 bridge Mux interface with selectable gain. I have attached link https://www.exar.com/content/document.a ... rt=XR10910The XR18911 can be controlled via I2C link. it does all the amplification necessary. I will need to use 2 XR10910 or 4 XR18911(8:1 sensor interface). And then finally controlled by our LEGENDARY ESP32 which converts the analog data to digital. and with the help of wifi to transmit it to a computer where it can be collected in an excel file along with time of capture.Could you guys kindly help me out on how i am to proceed with programming of the ESP32. I would really prefer to use Arduino IDE guys, as that seems to simplify things. Also if there is any improvements that could be added to the circuit. Kindly let me know. Please let me know if you need more details(Picture attached). Thank you

Hello. I made this circuit below: http://www.diy-electronic-projects.com/p270-Everything-that-moves-ALARM The circuit does not appear to be working properly, and I would like to get it working. To be honest with you, I never heard of a human body detector using eddy currents. The first image shows the pulses on the gate of the mosfet. They appear to be low duty cycle(around 15-20%). The other images show the pulses received by the smaller coil(5"/100T/26ga enamel wire) placed in the center of the 24ga speaker wire/5 foot diameter (5T) TX loop. The circuit can be set, but you cannot get it to trigger unless you actually touch/move the RX coil.The RX signal on the scope is more or less sinusoidal. Operating voltage is around 13.5vdc. Hopefully you can assist me. There is a 1000uF electrolytic capacitor across the power rail. Pins 4/8 on the cmos 555 and pin #14 of the 4093 are connected together to the + rail. Thanks,Doug