Easy and work project

Hello, I will show you how to make an off-timer delay. This circuit is simple and uses only 3 electronic components. The off time of this circuit is around 15 seconds. But you can change the R-value to increase or decrease off time. Let's make it like the below video.

Hello, today I will show you how to make a simple fan speed control by just 3 electronic components I use only 3 parts One is a 10 kilo-ohms resistor An IRF540N NPN MOSFET and a 10 kilo-ohms potentiometer No heatsink require for less than 2 A load  I use a MOSFET instead of a transistor because a MOSFET control input by voltage so it's easy to bias Let's start by connecting the resistor to the positive terminal and connect another leg to a MOSFET gate connect a MOSFET gate pin to a 10 kilo-ohms potentiometer. two resistor works as a voltage divider connect a MOSFET drain pin to the ground and also connect the potentiometer middle leg to the ground This circuit use only two legs of a potentiometer Then connect a source pin to the load negative pin and connect the load positive pin to 12 volt or positive terminal. See the video below for practical use.

Today I will show you how to make a very simple temperature control fan speed circuit. I use very minimal parts and works in real life. This circuit change 12 volts DC fan speed by temperature. The hotter the temp, the faster fan speed. The circuit principle is a voltage divider between T1 and 20 K potentiometer. When temperature increase, the Thermistor resistance decrease and make the voltage set point between T1 and R1 increase until it is higher than a Mosfet Vgs threshold and make a Mosfet change to ON state and conduct current to a fan. Below picture is the parts you need. Note: T1 is 10 K thermistor See the video below that shows how it work and full circuit diagram and the important of C1

This page shows you how to make a simple led flasher that can use with high current led bulb(10 Amperes for 12 volts led bulb). This circuit also can flash any led bulb both 12 volts and 220 volts and normal light bulb. The circuit uses minimal electronic components as you can see below picture. The circuit use IC 555 to send the signal to a relay so this circuit can withstand high current without generating any heat like another design. you can see video below for the instruction and test circuit. If you want to see the more interesting video. See my youtube channel here Easyandworksproject youtube channel

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!!!

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'm going to show you how to make a 3 ways touch selector switch. This electronic project makes you switch 3 electronic loads  (light bulb, electric fan) to switch on/off by touch the sensor. Let's start!!! Components you need: R1,R2,R3,R4,R5,R6 are 1 kilo-ohms resistor R7 = 10 kilo-ohms IC 1 = CD4017BE Relay 1,2,3 are 5 volts relay  TR1,2,3 are BD139 npn transistors led 1,2,3 = low power led red,green,blue C1 = 2.2 uf T1 = touch sensor This circuit use 4.5 - 5 volts power supply, so you can use 3 AA battery, USB power, or 4 AA rechargeable battery as you need. Use power supply over 5 volts not make circuit broken but the relay must be changed to 12 volts power supply type and you must use 5 volts regulator for touch sensor module.  All you need to do next is watching my video below

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 ...

If you want to make a simple VU meter. LM3914 is the best choice for you. It's easy to make VU meter or 10 dot/bar DC level meter with lm3914.  lm 3914 can withstand +-35 volts input without any damage so you can make VU meter even you are new in electronic DIY. The circuit uses minimal component to make the job done. List of component: R1 = 1 kilo-ohms R2,R3 = 4.7 kilo-ohms R4 = 10 kilo-ohms ic = lm 3914n-1 (lm3914) C1 = 4.7 uf at least to 47 uf (better bass respond) 10 LEDs red,green,yellow,orange or whatever you want 9 - 12 volts DC power supply LM3914 schematic diagram    Lm3914 VU meter video, the video show step by step guide and circuit explanation. Now, I add a sine wave rectifier circuit to lm3914, it makes the dot mode more accuracy. Real dot mode VU meter schematic diagram

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...

Hello, today I will show you how to make a DC power supply for your amplifier project. An audio amplifier normally needs DC power supply to feed it so you need to know how to make it if you want to make a good amplifier. Now, let's start. 1. Find your amplifier's recommended voltage. I use TA2024 amplifier board, the amp board recommends voltage is 8.5 - 13.2 volts so I need a DC power supply that output voltage does not exceed 13.2 volts. 2 Find the right transformer for your project. When you convert AC to DC with full bridge diode rectifier, the DC voltage increase around 1.4142 - 0.6 volts from an AC input when DC output doesn't connect to a load. I found the formula on the internet and it is AC x 1.4142 only but it was not same as I measured because the DC output voltage decreases around 0.6 volts. The transformer on the above picture provide 9.65 volts AC without connecting to a load, the voltage will drop when you connect to a load. So t...

Hello, today I'm going to show you how to make automatic night light switch. This circuit is easy to make and uses few electronic components. This automatic night light switch project makes you save your electricity bill and makes your light bulb life longer. The circuit uses 5 volts power supply so you can use old USB cell phone charger as a power source or you can use any 5 volts adapter that rate at least 100 mAh.  Electronic components list: BD139 npn transistor = 1 BD140 pnp transistor = 1 100 kilo-ohms resistor = 2 5Volts@100 mAh adapter 1 kilo-ohms resistor = 1 Led = 1 ( you can remove 1 kilo-ohms resistor and LED if you don't need LED indicator) 1 LDR (light dependent resistor) = 1 5 volts Relay = 1 All resistor are 1/4 watts rating Full wiring diagram Circuit explains: BD 140 is a PNP transistor that amplifies small current from 2 x 100 kilo-ohms resistor and sending current to  BD 139 NPN transistor Base (B) and am...

Hello everyone, today I'm going to show you how to make a touch sensitive switch, the switch makes you control light,motor just by touch the switch. The switch is very long life and safe to operate even your hand wet because you can put the touch sensor behind any plastic plate and make a touch sensitive light switch or you even can put the circuit in a lamp and make a touch lamp. This circuit uses CD4013BE d flip-flop IC . When you touch the touch sensor( The red module on the above picture) The sensor send output high to CD4013BE pin3 and make CD4013BE pin 1 change state to on or off once. However, CD4013BE output current not high enough for a relay to operate(yellow-black box on the above picture) so you need a PNP transistor(BD140) to amplify current for a relay. You can remove R4 and LED if you don't need light indicator in your project. This circuit uses 5 volts DC to operate so you need a transformer and it cause your overall circuit big but you can buy a ti...

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...