Easy and work project

In a previous post, I made an Infrared sensor that has a maximum range of only 5 centimeters but my audience want more detector range so I made the circuit for him and for all of you who interesting in DIY electronic project!!! The circuit use opamp comparator configuration that stable than a previous circuit that I use just two transistors to make the job done.  This circuit has detector range about 25 centimeters and can easily adjust detector range easily with a potentiometer(R4 in the below picture). You may need to block strong light expose directly to an Infrared sensor or the circuit will always turn on forever.  You can find the electronic components details in the above picture and you can see the instruction on my video below. You can ask any question on the comment box below if you have any question about this project. Enjoy DIY world!!!

This page contains Arduino Humidity sensor with led alarm source code. This project is good for someone who wants to make a humidity meter or hygrometer with led alarm if humidity and temperature over a threshold. It's easy to make and doesn't require an external power supply, just use power from an Arduino UNO R3 board (USB power compatible with this project). Electronic components list: 1 x Arduino Uno R3 1x 20 x4 I2C LCD display 1 x AM 2320 humidity/temp sensor 1 x 5 mm led ( 2 x if you plan to use led for pin 13 instead built-in led) 1 x 1000 ohms resistor ( 2 x if you plan to use led for pin 13 instead built-in led) Any USB power adapter, 500 mA current at least. Here is the Arduino code: AM 2320 library  https://github.com/hibikiledo/AM2320 LCD display i2c library  https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library #include <Wire.h> #include <AM2320.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x3...

I published hall effect sensor circuit diagram and my audience asked me how to make a hall effect sensor that has a high current capability, so I made it for him and for all of you who want to build high current hall effect sensor. Normally, hall effect sensor used for detect magnetic field and send output to a microcontroller, that means any hall effect sensor doesn't need to have high current output. However, if you want to drive motor or any high current device without a microcontroller, this circuit is the best for you. List of components for this project: 1 x IRF 9540N (P channel MOSFET) 1 x A3144 hall effect sensor 1 x 1 kilo-ohms resistor 1 x 10 kilo-ohms resistor optional (use for led indicator) 1 x 1 kilo-ohms resistor 1 x White, red, blue or any other low current led Note: all resistor for this circuit is 1/4 watt, 20 % tolerance is ok with this circuit. The principle of this circuit: When hall effect sensor detects magnetic ...

Hello, today I will show you how to make an IR toggle switch with Arduino and a Mosfet, it has far more detection range than capacitive touch device and easy to build. The circuit is easy to use and use minimal components to make a job done, now let's start Components list: R1 = 100 ohms resistor R2 = 470 Kilo-ohms resistor R3 = 10 Kilo-ohms resistor R4 =1000 ohms or 1 kilo-ohms IR1 = infrared led IRR1 = infrared receiver led = low forward voltage led, you can find it on any electronic part store Tube1 =Shrink tubing 1 x irf9540n p-type Mosfet If you have the components I list ready, it's time to upload this code to your Arduino UNO r3 /* switch  *   * Each time the input pin goes from LOW to HIGH (e.g. because of a push-button  * press), the output pin is toggled from LOW to HIGH or HIGH to LOW.  There's  * a minimum delay between toggles to debounce the circuit (i.e. to ignore  * noise).    *  * David A...

Now you will not forget to close your faucet or waste water when you pick a soap to wash your hand or face. This project shows you how to make an automatic faucet, you can even use the faucet that water valve damage because of this circuit use solenoid valve to control water. Electronic components you need: 1 Arduino Uno R3 1 TR1 = IRF 540n N channel MOSFET 1 Sensor1 = IR sensor 1 IR1 = IR led R1 = 10 kilo-ohms R2 = 100 ohms R3 = 4.7 kilo-ohms 1 12 volts solenoid valve 12 volts 1 Ampere adapter The Arduino code is very simple and you don't need to load any special module to make this project works  created 29 Dec. 2008  modified 9 Apr 2012  modified 20 Oct 2017 by easyandworkproject.xyz  by Tom Igoe  This example code is in the public domain.  */ // These constants won't change.  They're used to give names // to the pins used: const int analogInPin = A0;  // Analog input pin that the ir sensor is attached ...

Hello, today I will show you how to make a security door alarm, the door alarm is easy to make and give the best result. The door security alarm provides a very long battery life and easy installation, the circuit use only 2.4 volts to operate so you can power the circuit with 2xAA rechargeable battery or even you can use a lithium-ion battery with auto charging circuit as power supply because the circuit can withstand up to 5 volts power supply.  If you want to change the power supply to 12 volts, you simply need 7805 IC to regulate 12 volts to 5 volts without any problem. You also can use 12 volts Buzzer instead 5 volts Buzzer that I used in the circuit and connect directly to 12 volts power supply (solar charger's output, 12 volts car battery). The SCR (thyristor) in this circuit can withstand current up to 3 A so you can connect 20 Buzzers (estimate 100 milliamp/hour per Buzzer) with one circuit module without making any damage to The SCR. You also can ...

An infrared proximity sensor is a sensor that detects any object when it close to the sensor. The circuit is an important part of an automatic faucet, robot, and touchless switch. An above image is an infrared proximity sensor circuit diagram. The circuit is simple and easy to make, it has 2 transistors, 4 resistors, an IR LED, an IR phototransistor, and a purple or white or green LED (use as an indicator so you can remove it if you want) Electronic components list This circuit's maximum detection range is 10 centimeters, you can decrease the detector range by changing R2 resistor. Use 7805 regulator IC if you want to use the circuit with 12 volts power supply. The infrared proximity sensor consumes around 50 milliamps per hour when standby and consumes around 80 milliamps(add a relay that consumes 30 milliamps) so you need an external power supply because battery life will not last long. The reason that makes this circuit consume much energy because IR LED n...

This Arduino project: a contactless thermometer is good for anyone who wants to measure temperature from any object without touching it. The infrared sensor detects infrared radiation that is emitted from an object and converts the value to digital data and sent the data to the Arduino board via an I2C interface.  The sensor I use in this project is mlx90614, an infrared and ambient temperature sensor. It can measure a wide range of temperature from -70 to 380 °C for object temperature  reading  and the sensor also measure ambient temperature from -40 to 125°C.  Mlx90614 module read an object temperature and ambient temperature and sends both outputs at the same time.  The sensor module cost around 3 - 4 $ from eBay free shipping   worldwide!!! All you need for this project are Arduino unoR3,mlx90614 module,20x4 I2C display, and jumper wire. Below is the temperature sensor wiring diagram:   MLX90614 wiring diagram ...

Hall effect sensor switch is a switch that turns on when enough magnetic field near the IC. You can use hall effect sensor to make many Diy projects such as rpm meter, magnet detector, and more project involves with a magnet. Did you know? Hall effect sensor uses in many electric machines, example; when you open washing machine door and the machine stop spinning, or when you open microwave door then it pauses and send beeping sound until you close the door. Hall effect sensor IC in this post is A3144(old component but work well and low cost) Send output low (0 volts) when strong magnetic field near a sensor, that why somebody asked on the internet why his project involves hall effect sensor didn't work. Hall effect sensor wiring diagram. You can see an above image that a load(LED in this picture) connect to positive electrode and output instead output and ground. That's the reason why some projects don't work and will never work because the output low when magn...

Hello, today I'm going to show you how to build easy usb power automatic night light with easy to understand wiring diagram in this video. The circuit consume just .24 mah per hour and can add up to 5 or more leds (five leds are recommend or just change some resistor value and attach heatsink to output transistor). As you can see in this video that I used 4  rechargeable battery and got 4.8 volts, so you can use usb charger as power source too. List of component 2 BD 139 transistors or equivalent transistor 1 100 ohms resistor 1 1000 ohm resistor 1 20,000 ohm resistor 1 photo resistor 1-5 LEDs (the more led the more power consume if you use batteries power souce) wiring diagram: Hope you like it.